CMS 8GB (2X4GB) DDR3 10600 1333MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® B590 Series - A29 at Amazon.com
Lenovo Thinkpad B590 Laptop Computer, 2.20 GHz Intel Core i3, 4GB DDR3 RAM, 500GB SATA Hard Drive, Windows 10 Home 64 Bit, 15" Widescreen Screen (Used) - Walmart.com
Original A+ For Lenovo B590 B580 V580C motherboard Laptop main board 48.4TE05.011 HM77 Good working - Price history & Review | AliExpress Seller - Amy PC Parts Store | Alitools.io