What does the system "freezing" normally mean?

JonJ678

JonJ678

JonJ678

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I'm currently trying to get my system stable at 210 bsck. It's so close I can taste success. Then it freezes. No blue screen, doesn't reboot. Image on the screen becomes stationary (animations stop), mouse and keyboard ignored until a hard reset.

Passes ibt on the maximum ram XP can allocate, 20 passes anyway. I don't have a 64 bit copy of windows installed at present, can't seem to find an equivalent for ubuntu. Very interested if anyone knows of such a program.

Previously the system froze when I started ibt. Increased vcore, problem gone. It then froze partway through ibt. Again increased vcore, problem gone. I've now set 1.4V vcore in the bios and it'll run ibt for however long I wish. However the system still freezes occasionally. I'm at a loss, while I think more vcore will solve it I'm sure this isn't the best solution.

Stable at 210 with turbo off, the issue arises with turning turbo back on.

UD5/i7 920/corsair 1600mhz
Bsck 210
Ram x6 / ucore x16 / qpi x36
Vcore 1.4V (currently trying 1.425, doesn't seem to be helping)
QPI 1.315V (tried up to 1.35V)
IOH core 1.1 (tried up to 1.2)
PLL 1.8 (instantly unstable below 1.6)
Vdimm 1.64V
Turbo is on, load line calibration off. Energy saving things off.

Frustrated with it. Remaining to try are clock skews, which I can find nothing online about. various IOH related voltages (same), and a lower bsck which I'm not keen on. Where can I go from here?

edit: it also occasionally freezes while navigating the bios, making the issue os independent

New trick. Circuit breaker goes when the system is reset. Audio is unaffected by the screen freezing; I can still hear iplayer I just can't watch it. Circuit breaker going has worried me, back to 4ghz to see if it occurs at this speed. Shame, folding was loving the extra 400mhz.
 
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His RAM isn't overclocked, it's running at 1260MHz instead of 1600..

Jon, this is a long shot mate, but have you tried using 13x uncore multi instead of 16??
 
I can't select an uncore below 15 in the bios without the bios freezing, I may be able to start on x13 then increase bsck without it failing.

Google doesn't think much of freezing. I'm currently inclined to blame turbo, little sense though that makes. Crash is non reproducible at 4ghz, I believe the next step is to sit at 4.2 for a while.

Neither ram nor motherboard chipset gets warm to the touch as I have temporarily given up hopes of quiet. If I turn the 1600rpm scythe pointing down at them off both chipset and ram become hot, suggesting good thermal contact between sink and chips.

Ram is corsair dominator, currently running at 1600mhz c8 at 1.64V. At 4.4 it was running at 1260mhz c8 at 1.64V. Unsure where to go from here.

This thread mentions freezing as a result of some ram misbehaving. I've increased qpi and vdimm and am now in ubuntu @ 4.4 waiting to see if it crashes.

Ram and gpi voltage didn't do anything. Currently testing at 1.425V vcore, been good for half an hour so far. Failed after about an hour, but in a different way. Vcore up a notch, think this will hold. *optimism*.
 
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Vcore doesn't resolve this, at least nothing up to 1.45 helps. More qpi doesn't help. More Vdimm doesn't help. IOH voltage makes things much worse. Stuck.

I think I'm going to have to knock it down to 3.8 or so with turbo running then overclock in small notches from there, or not use turbo at all.
 
I have this problem when trying to get above 4Ghz on my micro with turbo enabled,
I rarely see a blue screen just a frozen desktop maybe my overclock just wont go that far but then again my chip is quite good on voltage up to 4Ghz so i know it must be able to go higher surely.
 
That's interesting. Same here, low voltage until I try to use turbo, then it all goes a bit wrong. Any ideas aside from giving up on the x21?
 
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