There is a FAQ in strictly Intel about this. you need Mushkin Level II black RAM, with the BH-5 chips. You have CH-5. It doesn't work well on the 875/865 at 5:4.
i tryed my kingston hyperx KHX4000/512 and i still couldnt get it to work it says that the voltge is 2.6 i tryed 2.7 and it didnt help.
my timing it 8/3/3/3
Are you running a FSB > 200 with the memory ratio turned down so the memory runs at 200mhz?
If so, you need Mushkin Level II Black. Nothing else will work, unless you find other BH-5 based memory somewhere (good luck). It's a problem with the Chipset.
I've had the same issue man. It's annoying as all hell.
240 - WALL, 239 fine.
I somehow managed to get mine to 251 bootable once and 248 stable. But when I switched from stock HSF to Vantec Aerocool, I couldn't obtain that. It was quite weird. It automaticly hit a wall at 240.
But I *was* running my memory in single channel mode (2x512 in channel 1) at the time, so who knows if that had something to do with it. Because I switched that to dual channel as soon as I switched the HSF.