A-Data XPG Gaming Series AX2U800GB2G5-2G DDR2 4GB (800MHz, CL5, 2 x 2GB) (Personal Computers)
For the past 3 years I have this memory of A-Data and he still works without problems. I've been thinking to switch to DDR3, but having to change my entire hardware because of the situation, I have so far refrained. Recently, I've even Corsair 4GB TW