The ram in the my brothers computer is ddr2 800 MHz. Well it was supposed to be.
I bought it because it was advertised at pc 6400 ddr2 800mhz memory.
When I put the comp together it would get a bsod and I didn't know why.
I brought it to the comp shop and after $200 worth of work they figured out it was the memory and they had to underlcock it to 666 Mhz. See I hated that. We waisted a ton of money.
200 at the comp shop and another 150 on the mem. If only I had picked out different ram.

Plan on getting different ram now.