Change or Upgrade RAM in lenovo thinkpad t430 / T420 / T410 / T510 / T520 / T530... - YouTube
Lenovo Thinkpad T410 T420 T520 1TB Hard Drive Upgrade
8GB Stick for IBM Lenovo ThinkPad T Series T420 T420i T420s T520 T520i. SO-DIMM DDR3 Non-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com
Added a couple more cores and 12 more gigs of ram to my T520 : r/thinkpad