Some person on Web says yes: https://forum.thinkpads.com/viewtopic.php?t=133646#p864052

There's also the W520, which looks like a T520, but is set up for a larger PSU, and had quad-core and better GPUs as factory options. (I own a few each of T520 and W520, but don't like the huge power bricks of the W. So I'm using the T as daily driver, until I really need something in the W.)