ThinkPad Buyer's Guide

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Welcome to the redesign!

Trying to maintain accurate prices on every model <2016 was a little nuts. Now, there are ranges of reasonable estimates.

More information has been added, including suggestions, resources, and education on the naming conventions for the modern models.

The eBay Guide has been here for some time, but it is hands-down the best way I have found to 'teach you how to fish'.

This way, the prices are always accurate to your situation.

If you appreciate the effort, a tip with the link above is very much appreciated!

Overview

Guide updated November 2019.

This Buyers Guide covers ThinkPads new enough to fully support Windows 10 with all updates - with models available from $50 on up!

Used ThinkPads are cheap because they are business-grade computers - and business-grade equipment is purchased new typically every 3-4 years. This is fantastic for the smart or thrifty, as software requirements haven't changed much since mid 2011. Even better, business-grade PC's tend to last far longer, and function far more consistently than consumer or even 'prosumer'-grade technology.

This is a freely offered guide on technology that I, and many others, consider to be the best of the best. That said, your mileage may vary - I can't promise how much you will like it. :)

Price estimates are in blue+bold.

If you’re patient, you can get one for even less!

This Guide is NOT an exhaustive list of all models available.

Rather, it focuses on models in the used market.

Many of the naming conventions, features, and advantages listed on this page for buying a ThinkPad are still valid for new models, however.

The reports of the death of the ThinkPad brand have been greatly exaggerated.

Why ThinkPad?

They’re incredibly cheap when you buy a used one.
Splash-proof keyboard thanks to drainage holes.
Keyboards feel excellent while typing - yes, even the new ones.
Great durability: your data is what it protects most, if it happens to be thrown out of a tall building or run over by a truck. The casing will deal with daily wear and tear like it’s nothing.
On older models - Utilitarian design, indicator LEDs, great keyboard key layout. (That's why some older models are actually worth more, for those used to the older keyboard, build, and aspect ratio. )
Docking solutions that easily turns your laptop into a desktop (some models, old and new, can even use external GPUs!) just by setting it down.
Easy to repair, upgrade, and maintain thanks to readily available Hardware Maintenance Manuals for almost every model, and spare parts are easy and cheap to obtain.
Very good Linux compatibility. Fed up with Windows? Lenovo certifies Linux compatibility on many models in cooperation with Red Hat and Canonical. Just don't expect great tech support - they're outsourced like everybody else. That's what Reddit and search engines are for. ;)

Want to get started with Linux? I recommend Pop!_OS LTS for ease of use, performance, and battery life.

TrackPoint (that red thing on the middle of the keyboard), is great for those who type a lot or hate swiping their fingers all over a touchpad. They work very well for games and other tasks requiring fine movement, such as artwork/design. It may seem archaic or outdated to some, but for others - it's why they use ThinkPads. There are very good reasons to learn & use it! Click here to read the story of the TrackPoint.

eBay Deal-Finding Quick Guide

Finding a good deal really comes down to understanding eBay sorting.

Basically,

pick a model
pick specs (IPS screen unless you plan on replacing it yourself)
search eBay
sort search by low to high, potentially use Offers category
make sure seller is highly rated with at least a hundred sales
READ THE DESCRIPTION OF THE LISTING (it may not be functional, and you are only warrantied by eBay for it matching the description!)
READ IT AGAIN

And now you have a ThinkPad xx70 or older for under $250 USD!

That's really all there is to it. It's really hard to go wrong with those steps, as eBay almost always sides with the buyer in disputes. Even if it doesn't make sense. I should know. I'm both a seller and a buyer.

I've purchased several ThinkPads this way with no unresolvable issues.

You're going to find the best deals on units from refurbisher/recycling companies that do not include the HDD/SSD/OS. That's not a problem at all. SSD's are affordable and easy to install, and Windows 10 Pro downloaded from Microsoft's site will activate itself on any hardware xx40+ automatically, and on any earlier model with the included 7/8 key on the sticker post install.

Alternatively - use Linux. It is 100% viable as a mainstream OS now since everything is done in the browser anyway, Steam support even for Windows games is great, and Linux is typically more stable and consistent than Windows.

Pop!_OS or Linux Mint Cinnamon is the way to go for beginners, Solus if you're looking for rolling release, and Arch if you're looking for nerd cred+lack of free time in addition to rolling release.

Recommendations

If it has a traditional hard drive, replace it with a solid state drive ASAP. This goes for all computers - not just ThinkPads. Check out this guide on how to do a clean Windows install.
If there's one thing ThinkPads have variance of quality on, it is the screen. Some models practically guarantee a 'good' screen - others are a mixed bag. If you care in particular about screen quality, get either an IPS or a touchscreen model. Even better, install an IPS screen after purchase. They are typically not difficult to install, but you should see if you are comfortable with the process by looking up '<model> screen replacement' in YouTube. Note, when looking for a model with IPS or touchscreen - you can expect to pay $100+ more than the prices listed in this guide. This is normal, and in my opinion, often worth the expense.
Click on the 'x Series' headings for specs on models in that series.
With the findings regarding Spectre and Meltdown vulnerabilities, we still don't know which processors will be patched. It's possible that none of those in this list will be. I doubt that however, as the world essentially runs on legacy hardware - but something to keep in mind. Spectre and Meltdown in 2 minutes here.
Scroll to the end of the Guide for benchmark comparisons and other buying tips.
Want even more tips and tricks? Check out this other Buying Guide from ThinkWiki.

Resources

The first thing you should do when you get your ThinkPad is to format it and install a fresh copy of Windows (downloadable here if you have a 7/8 key, or the unit came with 8 or above) or your favorite flavor of Linux to make it run as efficiently as possible. It gets rid of any risk of viruses and unneeded bloatware that the last owner left over or preinstalled for you.
To install drivers and firmware updates quickly (In Windows), use Lenovo System Update. Windows 8 or 10? - use Lenovo Vantage instead.
Need some cool software to use on your new ThinkPad, or want to learn more about technology? Take a look at my Free Resource Directory.
Looking for the 'exploded' wallpapers? Here you go. (Thanks to u/weedboi6969, u/mingxxie, and the rest from /r/thinkpad)
xx50 series has a screen whitelist, meaning if you buy one of those cheaply with the intent to upgrade the screen to IPS, you may need to follow this guide (thanks metrotw!) to make screen brightness driver control work in Windows. This is a non-issue in Linux.
Want to configure the TrackPoint speed in Linux? Here are two tools to do exactly that. Simple Sensitivity & TPConfig. TrackPad too sensitive or fast in Linux Mint? Here's how to fix that.
Want to coreboot/mod xx30's? Use 1vyrain!
Turkish your primary language? Mustafa Gokay's blog has a Turkish translation of some of this page.

Understanding the Modern (2010-2019) ThinkPad Model Naming Convention

Format: (letter)(number 1)(number 2)(number 3)(second letter)

There are other formats, but this is the most common within the modern structure.

Letters

T - Thin-ish. Medium/standard sized laptop. 14" and 15" variants available.

X - Ultraportable. Same thickness as the T series, but with a smaller screen (12" or 13') and less expansion options in favor of weight and a Yoga (2-1, touchscreen) option.

W- The old workstation line, discontinued in 2015 in favor of the P series. Thicker and heavier than the other classes - but you gain workstation-class graphics and CPU power.

P - Same as the W, but given that they are newer, they are relatively light and thin.

X1 - Flagship mainstream ThinkPad line. They tend to be comparable to the MacBook Airs in weight and thickness.

X1 Extreme - Compared to the other X1's, the Extreme is much more comparable to the MacBook Pro in terms of weight and power. The Extreme in particular is a near perfect blend of weight, power, and durability for the traveling worker/prosumer/gamer. Battery life pays a bit for that power tradeoff. The ThinkPad P1 is the same design, but with a Xeon and Quadro rather than an i9 and GTX. The X1 Extreme is the only ThinkPad that can be considered a 'Gaming ThinkPad' - unless you consider the PCMIA/ThunderBolt options (that can be paired with external GPUs) as well.

Numbers/Second Letters

The first number, (example, T420s) represents the screen size. In this example, the screen size is 14".
The second number, (example, T420s) represents the generation. In this example, the generation is the 2012 model.
The third number is a iterative variant of the generation, or alternative. For instance, the T431 has a totally different body design than the T430. The T495 has an AMD Ryzen processor rather than the T490's Intel options.
The second letters (examples: T420s, X380y, W700ds) represent specific features on that model. In these examples, the S in T420s represents Slim, the Y in X380y represents Yoga (2-1, touchscreen) and the DS in W700ds represents Dual Screen.

Questions?

Please use the subreddit if you want to ask questions about ThinkPads, but please read this guide carefully before asking questions, or use the subreddit search feature. No one likes to answer something that has already been answered.

Need to find the best software to run on your new ThinkPad? I've compiled a Free Resource Directory here.

Higher Budget?

Have a higher budget and want a new or factory refurb ThinkPad straight from Lenovo?

Here's two community-made tools to help you find what you're looking for on Lenovo's website more easily.

Lenovo Watch
Logaze (Scroll to make it populate)

My Favorite ThinkPads

(For each use-case)

Affordable Workstation: W540, W541

Yoga: P40 Yoga

Mobile Power: T440p / T495 / X1 Extreme / P1

Ultrabook: Any X series X230+, X1 Carbons 3rd gen and up.

Privacy: All xx30 generation ThinkPads compatible with 1vyrain.

Note: Limiting yourself to these models could be severely detrimental, do your research.

Free Software for Your Nearly-Free Laptop

Before the ThinkPad Buyer's Guide, I was making the Free Software Directory.

Check it out!

"But, but, but... I just want a cheap laptop! What model should I get?"

Any T or X series, as long as you don't care about gaming.

If you want 'gaming', T440p, W540, W541.

However, the newer ThinkPads are often just about as cheap as those ones are during those sales.

Note: the older you go, the more trash the battery life will be.

xx30 generation models are the oldest ones that really seem to hold up at good speed with modern browsers and media, but my bar is kinda high.

T Series (Medium sized laptop)

If you don’t know what size you want, just go for this series.

T series models with an ’s’ suffix (eg. T410s) means they’re slimmer than the regular T series laptops but unlike the X series, they have worse battery life compared to the regular T laptops. They also usually cost more than a regular T series.

T series models with a ‘p’ suffix (eg. T61p) means they’re more powerful than the regular Tseries and some come with stronger dedicated GPUs. These are similar to the W series.

T series models with an 'i’ suffix (eg. T420i) are basically the same as the Regular T series but with lower specs. Avoid the ones with Celerons, they’re too slow. i3 models are serviceable.

An aftermarket Quad Core i7 CPU will work in a T420, but they do not come as standard on any T420.

T520 prices vary depending on the configuration, the lower end price is listed here, but you may spend a bit more if the screen, CPU and GPU are excellent.

Notice:

The T440/T440s doesn’t have physical TrackPoint buttons, which might be a no-go for ThinkPad fans, but if you’re okay with Touchpads, then they’re... okayish? You can transplant the T450 TrackPad into the T440. Make sure you get the Synaptics model trackpad if you use Windows. Here's how to do it for the T440s.

T61 models with Nvidia GPUs are known to have higher than normal failure rates, avoid. Nvidia T61s made after 08/08 are safe but they are very rare.

If you are an unlucky owner of these older Nvidia T61 laptops, try to make it run as cool as possible by keeping the fans clean and using fresh thermal paste, this would extend its useful life quite a lot. Also, avoid sellers selling reballed/reflowed T61s with the older Nvidia GPU, they’ll most likely die within months if not weeks.

Extremely Affordable / Slower (Comparable to low-end new)

<$100

Expected specs: 2-4GB RAM, an HDD or SSD of any size.

T60 (14.1", 15" or 15.4" Core Duo/Core 2 Duo G1)
T60p (14.1", 15" or 15.4" Core Duo/Core 2 Duo G1)
T61 (14.1" or 15.4" Core 2 Duo G2) (non nvidia)
T61p (14.1" or 15.4" Core 2 Duo G2) (nvidia)
T400 (14.1" Core 2 Duo G3)
T500 (15.4" Core 2 Duo G3)

Good Value / Faster (Comparable to mid-range new)

<$150

Expected specs: 2 - 4GB + RAM, an HDD or SSD of any size.

T410 (14.1" Core i-series G1)
T510 (15.6" Core i-series G1)
T420 (14" Core i-series G2)
T520 (15.6" Core i-series G2)

Relatively New / Very Fast (Comparable to high-end new)

14" inch screens.

$100-$200+

Expected specs: 4GB + RAM, an HDD or SSD of any size.

T430 (14" Core i-series G3)
T440 (14" Core i-series G4)
T450 (14" Core i-series G5)
T460 (14" Core i-series G6)

Just updated!

Relatively New / Very Fast (Comparable to high-end new)

15.6" inch screens.

$100-$200+

Expected specs: 4GB + RAM, an HDD or SSD of any size.

T530 (15.6" Core i-series G3)
T540 (15.6" Core i-series G4)
T550 (15.6" Core i-series G5)
T560 (15.6" Core i-series G6)

X Series (Small sized laptop)

Portable and great battery life.

X series with an ’s’ suffix (eg. X200s) means they’re slimmer than the normal X series and use Low Voltage CPUs compared to Full Voltage. This means they’re even more portable and last longer on battery at the expense of CPU power.

Notice:

The X240 doesn’t have physical TrackPoint buttons, which might be a no-go for TrackPoint fans, but if you’re okay with Touchpads, then they’re...okayish? Here's my guide on replacing that trackpad with the far better one from the next generation. Make sure you get one that is Synaptics-branded (ask the seller) if you use Windows. Here's where I got mine.

X series models with an 'i’ suffix (eg. X220i) are basically the same as the Regular X series but with lower specs such as being equipped with Celerons, Pentiums and i3 CPU options. Avoid the ones with Celerons and Pentiums - stick with i3 as the minimum configuration for a reasonable experience.

Extremely Affordable / Slower (Comparable to low-end new)

Expected specs: 2GB + RAM, an HDD or SSD of any size.

<$100

X60 (12.1" Core Duo/Core 2 Duo G1)
X61 (12.1" Core 2 Duo G2)
X200 (12.1" Core 2 Duo G3)
X201 (12.1" Core i-series G1)

Good Value / Faster (Comparable to mid-range new)

Expected specs: 4GB + RAM, an HDD or SSD of any size.

<$150

X220 (12.5" Core i-series G2)
X230 (12.5" Core i-series G3)

Relatively New / Very Fast (Comparable to high-end new)

Expected specs: 4GB + RAM, an HDD or SSD of any size.

$100-$200+

X240 (12.5" Core i-series G4)
X250 (12.5" Core i-series G5)

Rare/Oddities

Expected specs: 4GB + RAM, an HDD or SSD of any size.

$100-$200+

X300 (13.3" Core 2 Duo G2)

X301 (13.3" Core 2 Duo G3)

X Series Tablet (Old-style Convertible PC)

A bit bigger than the X series. It has pen input thanks to a 256-level pressure sensitivity Wacom Digitizer and some models have finger multi-touch as well. And it twists! How cool is that?

X series Tablet models with an 'i’ suffix (eg. X220i Tablet) are basically the same as the Regular X series Tablets but with lower specs. Avoid the ones with Celerons, they’re far too slow.

There are some X60/X61 Tablet models that have a 1400x1050 display. They usually cost a lot more than a regular one, so if you see one selling for cheap, don’t pass up on that deal! Unfortunately the High resolution versions of the X61 Tablet also suffers from a very ugly bubble problem where the glue leaks out and creates bubbles inside the display as it ages. The X60 Tablet Hi Resolution display doesn’t have this problem.

X series Tablets; X41t, X60t, X61t, X200t and most X201t models use Low Voltage Intel CPUs. X220t, X230t and very few X201t models use Full Voltage Intel CPUs.

BE ADVISED - SOME OF THESE MODELS HAVE OPTIONS FOR TOUCH WITH FINGERS *OR* PEN EXCLUSIVELY.

Lenovo has jumped around on which of their ThinkPad product lines should have the Yoga functionality/branding, so I won't get into it. Instead, use DuckDuckGo/Google, and use the general eBay guide at the top of the page.

Extremely Affordable / Slower (Comparable to low-end new)

Expected specs: 2GB + RAM, an HDD or SSD of any size.

<$100

X60 Tablet (12.1" Core Duo/Core 2 Duo G1) - <$100
X61 Tablet (12.1" Core 2 Duo G2) - <$100
X200 Tablet (12.1" Core 2 Duo G3) - ~$120, $140
X201 Tablet (12.1" Core i-series G1) - ~$150, $210

Good Value / Faster (Comparable to mid-range new)

Expected specs: 4GB + RAM, an HDD or SSD of any size.

<$150

X220 Tablet (12.5" Core i-series G2) - ~$50, $100
X230 Tablet (12.5" Core i-series G3) - $60, $150

Rare

Expected specs: 2GB + RAM, an HDD or SSD of any size.

<$150

X60 Tablet/X61 Tablet 1400x1050 - ~$170, $280

W Series (Desktop Replacement)

If you lift (heavy weights) or just like a desktop replacement, look no further than the W Series.

W-series prices vary greatly depending on the configuration, the lower end prices are listed here, but you may spend almost double if the screen, CPU and GPU are excellent.

(All of these I would consider fast)

$60-$200+

W500 (15.4" Core 2 Duo G3)
W700 (17" Core 2 Duo G3 Quad-Capable)
W510 (15.6" Core i-series G1 Quad-Capable)
W520 (15.6" Core i-series G2 Quad-Capable)
W530 (15.6" Core i-series G3 Quad-Capable)

X1 Carbon (Exceptionally Thin and Light)

Like the MacBook Air size, but want something even lighter - yet more powerful? AND more durable? You found it.

X1 Carbon models are, in my opinion, the best and most featureful thin-and-light computers available.

Notice:

The X1 Carbon G2 doesn’t have physical TrackPoint buttons, which might be a no-go for TrackPoint fans, but if you’re okay with Touchpads, then they’re...okayish? It also has an odd keyboard layout and a TouchBar top row. Yes, it was released years before the MacBook TouchBar.

(All of these I would consider fast)

$100-$200+

X1 Carbon G1 (14" Core i-series G3)
X1 Carbon G2 (14" Core i-series G4)

(All of these I would consider fast)

$100-$400+

X1 Carbon G3 (14" Core i-series G5)
X1 Carbon G4 (14" Core i-series G6)

ThinkPad Yoga (New style convertable PC/Tablets)

Like tablets and touchscreens, but still want durability and power?

You find that stunning combo in the ThinkPad Yoga line, and I believe this 'best of everything, worst of nothing' approach is going to be the way forward for users that do not need the raw horsepower that demands a workstation machine.

The best of these so far in the used market is the P40 Yoga.

Lenovo has jumped around on which of their ThinkPad product lines should have the Yoga functionality/branding, so I won't get into it.

Instead, use DuckDuckGo/Google, and use the general eBay guide at the top of the page.

Note:

The S1 Yoga has the 'bad' trackpad. It can be replaced with this one.

Other Important Info

Found an older model not in this guide?

For stuff like T42, X41 or earlier, don’t bother, unless you’re collecting.

'Other' Series

Unless the deal is excellent, avoid:

R-series
SL-series
Z-series
Edge/E-series

These are cost-cut versions of ThinkPads which are thicker, are made of lower quality plastics and are less durable. Terrible hinges on the Edge series especially, some Edges have electrical shorting issues.

The only time I've had a ThinkPad break and didn't know why was an R.

Where do you look for one this cheap?

eBay, Craigslist, Facebook Marketplace, Gumtree, your local newspaper, garage/yard sale or flea market.

You may even be able to find newer ThinkPads such as the xx70 models on the Lenovo US Outlet for under $500 if you’re lucky.

Here are a few tips for buying a ThinkPad in-person.

Check for physical damage. Make sure you’re happy with the physical condition of the ThinkPad that you’re buying.
Make sure there’s a charger and it works
Turn on the laptop, make sure everything lights up. While it’s in the boot screen, press the Blue ThinkVantage button. It should go into the BIOS with no password.
Navigate the BIOS menus, in Security, make sure no other password is set and Intel AMT and Computrace is Inactive or Disabled. (Check the right side of the BIOS screen for current status.)
If the hard drive is working, it should boot into an existing OS unless the listing states, NO OS INCLUDED.

BIOS LOCK WARNING!

Never EVER buy ThinkPads with BIOS locked (Supervisor) passwords, you cannot reset it by taking out the CMOS battery. The Supervisor password is stored on a chip and requires special equipment to extract it or a complete motherboard replacement.

If you do know what you’re doing, there is a $100 tool which can be used to recover the BIOS/Supervisor password from almost any ThinkPad (except some SL models) available at www.ja.axxs.net.

Make sure it can actually access the BIOS. Sellers selling parted out ThinkPads that “Boot to BIOS” are safe. For you collectors out there, if the old ThinkPad cannot advance past the 00161 and 00163 (Dry CMOS battery/No time set) errors, there’s a good chance that the BIOS is locked because the time couldn’t be set.

If your laptop comes with Computrace enabled, there’s a chance that the laptop was stolen, or the previous owner forgot to disable it. You and your ThinkPad can still be tracked and be remotely disabled if Computrace is enabled.

There’s an empty WWAN/PCI-E slot in my ThinkPad, what can I use it for?

On models with Core i-Series G2 and newer (X220, T420, etc.), you can install a bootable mSATA SSD module (currently up to 1TB) in the empty slot. On older ThinkPads (X201, T410 or older), you cannot install mSATA SSDs, they will not work at all. hwtools.net has a lot of interesting things you can put in a regular WWAN/PCI-E slot such as SD card slots and connectors for external GPUs. In order to use these special PCI-E cards, you will need to remove the Wi-Fi whitelist, which involves flashing a custom BIOS.

Should you get a genuine Lenovo battery or a cheap generic battery?

It is tempting to cheap out on a battery for your ThinkPad. There are a few things to keep in mind if you’re thinking of getting a generic battery.

Generic batteries rarely have their advertised capacity.
The batteries usually come with 70-80% of the designed capacity of the Genuine battery
Can be a lot bulkier or have a different design
The battery meter isn’t very reliable but slowly gets better as you charge it more. For example; the battery will work fine till about 15% then instantly jumps to 0% and shut down.

So take your pick: a reliable, but costly (over $100) battery or a slightly annoying and shorter lasting battery for $30.

Can all of those ThinkPads listed play my high quality movies and TV shows?

720p sure, very high bitrate 10bit 1080p playback not guaranteed on Core 2 Duo and ULV CPUs. 3rd gen core I series such as present in the T430, X230, etc, have more graphics-capable CPU's.

Can I play games on a ThinkPad?

With an eGPU (provided it's supported by your model) or a dedicated GPU model, your results should be pretty good. Integrated graphics means don't expect much beyond emulators and indie retro stuff. Dolphin can run on Haswell CPU's and up, for instance - within reason.

Does CoreBoot work on a ThinkPad?

CoreBoot has been tested to work on the T60, T530, X60, X200, X201, X220 and X230 models.

Thinking about getting a Hard Drive / Solid State Drive upgrade?

Make sure you get the Correct size drive otherwise it won’t fit!

Regular Size 2.5" 9.5mm SATA Drive:

T60, T60p, T61, T61p, T400, T500, T410, T420, T510, T520, T530.

X60, X60s, X60 Tablet, X61, X61s, X61 Tablet, X200, X200s, X200 Tablet, X201, X201s, X201 Tablet.

W500, W510, W520, W530.

Slim Size 2.5" 7mm SATA Drive:

T420s, T430, T430s, T430u.

X220, X220 Tablet, X230, X230 Tablet.

1.8" µSATA Drive:

T400s, T410s.

X300, X301.

Intel Processor and Chipset Generations Guide

This section shows the limitations of each Intel chipset generation used in ThinkPads.

CPU Performance is measured by Geekbench 4, Single Core/Multi Core.

GPU Performance is measured by 3DMark06. (No dedicated graphics benches)

PS: These performance numbers have been obtained from Notebookcheck.net for GPU scores and Geekbench 4 for CPU scores. I did not run these benchmarks myself.

Core Duo/Core 2 Duo G1 = Yonah/Merom Socket M (Napa Centrino Platform)
Max 3GB DDR2 RAM
Intel GMA 950
SATAI 1.5Gbps
DDR2 RAM is currently more expensive than DDR3 RAM
CPU Score (T5600): 1000sc/1600mc
LV CPU Score (L2400): 750sc/1350mc
Intel GPU Score: 130
Core 2 Duo G2 = Merom Socket P/Penryn 800 (Santa Rosa Centrino Platform)
Max 4GB DDR2 RAM (8GB unofficially)
Intel GMA X3100
SATAI 1.5Gbps
Middleton BIOS mod can unlock SATAII 3Gbps
DDR2 RAM is currently more expensive than DDR3 RAM
CPU Score (T7300): 1100sc/1950mc
LV CPU Score (L7500): 800sc/1500mc
Intel GPU Score: 400
Core 2 Duo G3 = Penryn 1066 (Montevina Centrino Platform)
Max 8GB DDR3 RAM
Intel GMA 4500MHD
SATAII 3Gbps
These are picky on which DDR3 modules would work, 1066MHz speed modules are your best bet, but they are more expensive than newer, faster DDR3 modules.
CPU Score (P8400): 1280sc/2250mc
LV CPU Score (L9400): 1000sc/1800mc
Intel GPU Score: 740
Core i-series G1 = Arrandale (Capella Centrino Platform)
Max 8GB DDR3 RAM
Max 32GB DDR3 RAM on the W510 with 4 SODIMM slots
Intel HD Graphics
SATAII 3Gbps
CPU Score (i5-540M): 1970sc/3700mc
LV CPU Score (i7-620LM): 1700sc/3200mc
Intel GPU Score: 1500
Core i-series G2 = Sandy Bridge (Huron River Centrino Platform)
Max 16GB DDR3 RAM
Max 32GB DDR3 RAM on the W520 with 4 SODIMM slots
Intel HD 3000 Graphics
SATAII 3Gbps on mSATA SSD slot
SATAIII 6Gbps in Main Drive Bay
CPU Score (i5-2520M): 2400sc/5000mc
Intel GPU Score: 3400

Core i-series G3 = Ivy Bridge (Chief River Centrino Platform)
Max 32GB DDR3 RAM
Intel HD 4000 Graphics
SATAII 3Gbps on mSATA SSD slot
SATAIII 6Gbps in Main Drive Bay
CPU Score (i5-3320M): 2800sc/5700mc
LV CPU Score (i5-3317U): 2200sc/4300mc
Intel GPU Score: 4500
Core i-series G4 = Haswell (Shark Bay Centrino Platform)
Max 16GB DDR3L RAM on Haswell-U
Max 32GB DDR3 RAM on Haswell-M
Intel HD 4400 Graphics on Haswell-U
Intel HD 4600 Graphics on Haswell-M
SATAIII 6Gbps or M.2 4x PCI-E 3.0 SSD
CPU Score (i5-4200M): 2800sc/6000mc
LV CPU Score (i5-4200U): 2500sc/4700mc
Intel M GPU Score: 6300
Intel U GPU Score: 5100
Core i-series G5 = Broadwell
Max 16GB DDR3L RAM (32GB unofficially) on Broadwell-U
Intel HD 5500 Graphics on Broadwell-U
SATAIII 6gbps or M.2 4x PCI-E 3.0 SSD
LV CPU Score (i5-5200U): 2600sc/5300mc
Intel U GPU Score: 7000
Core i-series G6 = Skylake
Max 32GB DDR3L/DDR4 RAM on Skylake-U
Intel HD 520 Graphics on Skylake-U
SATAIII 6gbps or M.2 4x PCI-E 3.0 SSD
LV CPU Score (i5-6200U): 3000sc/5600mc
Intel U GPU Score: 8600
Core i-series G7 = Kaby Lake
Max 32GB DDR3L/DDR4 RAM on Kaby Lake-U
Intel HD 620 Graphics on Kaby Lake-U
SATAIII 6gbps or M.2 4x PCI-E 3.0 SSD
LV CPU Score (i5-7200U): 3500sc/6700mc
Intel U GPU Score: 9600

Core 2 Duo Generations 1-3 refer to the Centrino chipset generation, not the CPU generation because some models such as the T61 offer both Merom 65nm and Penryn 45nm CPUs on the same chipset.

These are the current prices in the US.

Prices listed are in $USD

Thanks to ThinkWiki for the ThinkPad pictures.

Please visit www.ThinkWiki.org for more details such as specifications of each ThinkPad.

Special Thanks

I would like to thank KTGee.net for creating the original guide, which is now offline. I was able to contact them, and they merely no longer desired to maintain it. I would credit the person themselves - but they stated they wished to remain anonymous.

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