Summary: I added this memory to an existing setup with 2G PNY memory. Caused Windows Home XP to restart after about 1 minute. I tried several times with the same result. I removed the memory and it works just fine. The photo shown for the memory off.
Summary: Ordered this for an old Lenovo PC that called for PC5400 DDR2. For some reason I didn't understand the PNY memory would't work. Bought the Kingston PC5400 DDR2 and it worked fine. I called PNY and they said their memory does something different (can't remember what) and would not work in the Lenovo.
Summary: I bought this for an older Dell machine running a single-core AMD AM2 processor. My goal was to speed up the machine as much as possible, for as little money as possible, and since the CPU is outdated and not replaceable, I went for largest RAM I could.