HP Laptop EliteBook Intel Core 2 Duo SL9400 (1.86GHz) 4GB Memory 250GB HDD Intel GMA 4500MHD 12.1" Windows XP Professional (available through downgrade rights from Genuine Windows 7 Professional) 2530 - Newegg.com
2GB [1x2GB] Memory RAM Upgrade for the Compaq HP EliteBook 8530p, 8530w, 8730w | eBay
How to upgrade RAM and SSD on HP 2530p - HP Support Community - 6683751
8GB 2X4GB Memory RAM for HP EliteBook 2530P 200pin 800MHz PC2-6400 DDR2 SO-DIMM Black Diamond Memory Module Upgrade - Walmart.com