Stable Prime and IBT, but unstable idle?

cje · 13 Feb 2009 at 09:28

Hey guys, I'm running 3.2 ghz with a Q6600 and Striker II extreme.

I've got it prime and intel burn test stable with 1.536vcore. Yes it is high, but temps are OK.

It's been stable for 10 hours on prime95 and then about 20 passes linpack intel burn.

But then after I left the pc for 10 m inutes, it bluescreened and restarted on it's own. How can it be stable during load, but unstable idle?

Current BIOS settings (1104):

FSB : 1600
Multi: 8
PCIE:101
SPP<>MCP : 201

Spread Spectrum (ALL) : Disabled
Speedstep, c1e etc all : disabled.

Vcore: 1.45
Loadline Calibration : Enabled
VDIMM: 1.62
NB : 1.48

Rest is on auto

I remember reading somewhere, that on these boards I might have to look into GTL tweaking? Anyone want to help? What should I set my VTT to?

EDIT forget the unstable on idle thing, I found that setting my ram to 2t solved it.

Should I be lloking into GTLs though for 1600 fsb?

Cob · 14 Feb 2009 at 11:02

Shouldn't need to tough the GTL's for 1600mhz FSB. It's a relatively low FSB.

cje · 14 Feb 2009 at 11:09

Ok thanks. Found out that ram timings were unstable with that fsb for some reason. Damn this board is hard to work with.

cje · 22 Feb 2009 at 23:17

Sorry to dig up this thread again, but it is happening again.

My overclock passed 200 test of Intel Burn Test, I left it alone watching BBC iplayer, and it bluescreened in 10 minutes. Current settings are:

FSB 1520
Multi: 9x
RAM : 1333 (Stock)
Unlinked mode

Ram timings : 9-9-9-24 2T

PCIE: 101
SPP <> MCP : 201
Vcore: 1.5v
VDIMM : 1.6
NB : 1.44
NB GTL : +10mv

Speedstep, C1E etc all disabled. All other settings on auto.

I just don't get it now. Any ideas where to go next? I am at a loss.

OH, and it ALWAYS bsods about 10-11 minutes after starting to watch an iplayer movie.

EDIT - IF it help, known stable settings are:

fsb : 1600
multi: 8x
RAM : 1333
timing: 9-9-9-24-2T

VCORE:1.45
VDIMM:1.6
NB:1.44
NB GTL: +10mv

cje · 23 Feb 2009 at 17:10

Anyone? anyone at all?

kppanic · 23 Feb 2009 at 20:12

cje said:
Anyone? anyone at all?

Not sure of your board, but make sure Loadline Calibration or any Vdrop mod is disabled. It is known that with such options systems are fine under load but actually become unstable at idle due to the mechanics of how such flags work.

cje · 23 Feb 2009 at 20:53

Ah, OK. I did have it enabled. I'll disable it and raise the vcore a bit more then.

cje · 23 Feb 2009 at 21:28

Genius! Thanks ever so much mate. I have stopped using Loadline Calibration. Only trouble is that I can't get 3.6ghz stable anymore, without pumping 1.6vcore into it. And thats way too much on air for me. The chip has a VID of 1.3, it'll boot with 1.5vcore in BIOS, ACTUAL is 1.56v. But it droops down to 1.48 during heavy loads. I guess it needs more, which I can't give due to temps.