Did I break my CPU?

[Hammerstein]

I've gone through three motherboards. The first was fine for three weeks and then the fan header died and performance was screwy, too. I RMA'ed it and the second had the same issue. The third, also, which I got today, but that has another issue, too, (HSF bracket is broken, so I have to return it anyways :/), but I was able to test it with the HSF mounted on it without the clips so it was even. Anyways, by this point, I doubt it is my mobo. So, that likely leaves RAM or CPU...

I say this because all the SANDRA benchmarks are terribly low (CPU and memory). Memory bandwidth is reduced to around 1600 MB/s on an i865G. It is recorded as around 2000 MB/s if I run Memtest. This is reflected in games - Morrowind stuttered where it did not before. 3D Mark 2001 is 7100 on a P4 2.6C with a R9800 Pro (No AA, AF, default settings). However, the Shader aspect of 3D Mark runs at full speed, at 100-ish fps, suggesting that the GPU is fully functioning.

With the motherboard probably eliminated...any thoughts?

Any help at all is REALLY appreciated...