Well, I got my new Xeon X5650 in the mail today, I already have two from Ebay, but one of them is faulty and when both were seated in my SR-2 it would cause the mobo to stick on POST code FF and go nowhere and never boot. RMA'ed the motherboard. Had to have been one of the Ebay X5650s.
Bought a completely new X5650 from Amazon for $100. Never used. EoL so it's $900 off it's original retail price. What a steal lol. New Xeon X5650 + Ebay Xeon X5650, no FF code.
Stock, they idle at 0.950 volts (lol, so low, gotta love server parts) , and fully loaded 1.1 volts. Idle temps high 20Cs to low-mid 30 Cs, load temps ~50C.
Put the BLCK up to 195 (3.9 GHZ from 2.667)
Tried 1.25 volts at first.
BSOD 0x101 just after Windows booted to Desktop and I was starting to run things.
Quick googling, basically the BSOD means not enough vCore.
Raise to 1.28.
BSOD 0x124 about 1/3 way through the CPU test of Cinebench.
Also, 0x124, from what I gather, means not enough vCore. Considering I just had my E5620s overclocked to 3.51 GHz, I doubt it could be anything else. Nothing in the system is faulty, as the system was running fine previous to my X5650s being installed, with overclocked E5620s. I simply change vcore and leave all the other stuff (PLL, VTT, other stuff I don't know what does) on auto, as this seemed to work fine for my E5620s, even when overclocked. My E5620s if I recall ran at 3.51 GHz at 1.25 volts. Obviously, since these X5650s are six core, they will need more voltage... at least, I would surmise.
Raise to 1.3 volts
BSOD 0x124 about 1/2 way through CPU test of Cinebench.
So... should I keep going with the voltage, (anything over 1.3 tends to worry me) or do you think I should try to change some of the other settings (VTT, PLL, others I don't know what they do) to try to acheive stability?
At 1.3 volts both X5650s were idling about 35c and load (untill the BSOD, at least) about 65c. TJmax of the X5650s are 81c.