For real 20 GB DDR4?
Probably two sticks 16 and a 4.
Not quite, these were available with either 4GB or 8GB soldered to the mainboard, with a slot to upgrade to a max of 20GB for the 4GB version or 24GB for the 8GB version, making this one the 4GB soldered spec.
Edit to add: These are actually pretty decent machines especially for someone intending to run Linux or BSD based OSes on them. The build quality isn’t quite as good as older Thinkpads from the Core2Duo and early Core i-series era, but specs-wise this isn’t a bad machine at all. The highlight is the LCD panel; unlike older Thinkpads this one came standard with a IPS screen at either 1080p or 1440p. No crappy viewing angles and nigh-unusable 768p here!
As the listing (thankfully!) shows, they are not officially supported by Windows 11, so bear that in mind when you get ready to drop $500 on a refurb laptop. It’s still a pretty decent deal for those who know what to do with a machine like this.
Spec-wise the processor is terrible and a dual core from 2015. Most $500 laptops today would run circles around it. The only thing it has going for it is the 20gb of ram which it couldn’t run most decently demanding programs well enough that could utilize that.
I was given one of these as my work computer. Constantly overheated. Windows was corrupted right out of the box. I actually saw the computer throttle itself down to 200MHz (yes, Pentium III speeds) because of overheating. I could not use Zoom (to broadcast) and anything else without the damn thing overheating. They replaced it with a T490 which ain’t much better. So, if you’re doing anything more than just Word or Minesweeper, I might look elsewhere.
Agree, windows corruption is an issue and should be resolved with a re-image. On the other hand, this seems like a good/solid machine that will last for a number of years given the robust memory and i7 CPU (even though it’s a bit old).
I wish it folded yoga-style and I would buy it.
“Five year old processor”…
So you’re saying that it would make a spifferiffic Chrome OS Flex platform. 
Well I did caution against buying a machine like this for $500 today, otherwise for specific use cases (Linux or OpenBSD in particular) it makes for a solid machine. It could be found cheaper on other sites, I’m sure. Also, those $500 laptops from today all have 15" or 17" 1366x768 panels with horrible viewing angles and pixels so big you can see them from three feet away, so there’s that to consider as well.
We had these at work and mine was upgraded to 20 GB because 8 wasn’t enough for what I needed to do and it was actually slower with 20 GB than it was with 8 GB because you lose the dual channel DDR performance in that configuration. These look good on paper but they’re garbage compared to what the specs would suggest.
They work pretty well if you keep their vents adequately uncovered or change the power settings in the control panel to limit the CPU to 90% instead of 100%, and provided that you’re not doing any heavy lifting with them, but don’t expect more than 8 GB of performance from them just because you see 20 GB of RAM in the specs. It just isn’t there to be had.
Other than that, these are decent if those caveats are OK with your uses.