A-Tech 4GB Stick for Dell Studio Notebook Series 1537 1555 1737 - DDR2 800MHz PC2-6400 SO-DIMM RAM Memory at Amazon.com
8GB (4GBx2) Team High Performance Memory RAM Upgrade For Dell Studio 1555 (DDR2) Model Laptop. The Memory Kit comes with Life Time Warranty. at Amazon.com
Dell Studio 1555 / 1557 / 1558 Memory Removal and Installation