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Great 4.0 OC, trouble with 4.2 (i7 930)

post #1 of 6
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i7 930 currently @ 4.0ghz (HT on), ASUS P6X58D-E, 6GB G.Skill PI 1600mhz.

I've had a stable 4.0 template for months now, and have finally found the time to start pushing for 4.2-4.4.

At 4.0 I'm running with 1.28 vcore, 1.26 qpi, 1.88, and 1.50 on ram for 191x21. Temps are fine.

When I push it higher, to let's say 4.2, I'm having trouble determining where the problem is. Here is an example of my attempts recently:

1.325 vcore + 1.3 qpi = Linx fail
1.325 vcore + 1.31 qpi = Linx fail
1.33 vcore + 1.31 qpi = bsod (0x9c)
1.30 vcore + 1.28 qpi = Linx fail
1.29 vcore + 1.32 qpi = Linx fail

What's annoying me is that the problem has mostly been in Linx, with very few freezes, making it difficult to pinpoint the exact problem. I've had almost no freezes or BSODs at any of these settings, except when I moved vcore to 1.33. Otherwise, everything runs fine on the surface but fails Linx during the first pass or two. I've also upped the ram to 1.6 as well.

Any ideas on the next step? I could obviously just shoot the vcore up very high, but I'm trying to avoid doing that. I'm just curious about why I can run low vcore/qpi with no BSOD and then BSOD basically any time I try 1.33 vcore with around 1.3 qpi.

End goal was 4.4 because of the decent numbers I got for 4.0 and my temps, but 4.2 has been a bit annoying to start off.
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THE RiG
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post #2 of 6
Increase your PCI-E Bus speed to 103Mhz, Also I what are your memory speeds and timings. I'd probably loosen your timings and run a T2 instead of a T1 if you aren't already.

Comps

E.G My timings are 9-9-9-24 T2
post #3 of 6
Quote:
Originally Posted by boondoks View Post
i7 930 currently @ 4.0ghz (HT on), ASUS P6X58D-E, 6GB G.Skill PI 1600mhz.

I've had a stable 4.0 template for months now, and have finally found the time to start pushing for 4.2-4.4.

At 4.0 I'm running with 1.28 vcore, 1.26 qpi, 1.88, and 1.50 on ram for 191x21. Temps are fine.

When I push it higher, to let's say 4.2, I'm having trouble determining where the problem is. Here is an example of my attempts recently:

1.325 vcore + 1.3 qpi = Linx fail
1.325 vcore + 1.31 qpi = Linx fail
1.33 vcore + 1.31 qpi = bsod (0x9c)
1.30 vcore + 1.28 qpi = Linx fail
1.29 vcore + 1.32 qpi = Linx fail

What's annoying me is that the problem has mostly been in Linx, with very few freezes, making it difficult to pinpoint the exact problem. I've had almost no freezes or BSODs at any of these settings, except when I moved vcore to 1.33. Otherwise, everything runs fine on the surface but fails Linx during the first pass or two. I've also upped the ram to 1.6 as well.

Any ideas on the next step? I could obviously just shoot the vcore up very high, but I'm trying to avoid doing that. I'm just curious about why I can run low vcore/qpi with no BSOD and then BSOD basically any time I try 1.33 vcore with around 1.3 qpi.

End goal was 4.4 because of the decent numbers I got for 4.0 and my temps, but 4.2 has been a bit annoying to start off.
Hi,

Am running more cooling than you are but here's a few
settings when I was at 4.4. with the 930 and same board.

Set your ram to thier listed timings and voltage.
CPU 1.38-9. Slowly raise if have to if no temp problems.
QPI 1.33 Same.
PLL Default 1.80
Pci-e Default 100
Multi 21x
All power saving features Off. I run HT on but up to you.

Once you hit 4.1-4.2 going to be a needed V jump to get to
next level. The blck wall.

But all depends on your chip-cooling-ambient as to final.
You may have to go higher with your voltages to get there and
I use about 78c as my high temp clock under load.
Those temps were with 480.3 and now running 600.5 water
and 75c at 4.51.

I use Prime Blend.

Later
Edited by Irocing - 2/22/11 at 2:27pm
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Works for me
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Crucial 128 M4 Boot-WD 640 Sata3 Storage Plextor/ Samsung 600.5- 3 Rads-Micro Rez-355 Pump Win 7 64 bit he 
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post #4 of 6
At about this point in my OC, I had to start ramping volts to get any further.

I'm on 1.25 for 4GHz, 1.31 for 4.2GHz, 1.36 for 4.3GHz.


When I was pushing for 4.3 however, I started getting failures in LinX, and that turned out to be the RAM. What solved it for me in the end was knocking all the timings down from 8 to 9 and giving the RAM voltage a bump from 1.64 to 1.66.


To test, ditch your RAM clock and timing down to something really low and see if you can get stable then.

Edit:
Also, I found a pip on the PLL voltage helped increase my stability at a slightly lower v-core for 4.3, though it didn't solve it completely.
Edited by Crabid - 2/22/11 at 4:12pm
    
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post #5 of 6
i think hes right^, i need to start messing with ram timing to get 4.3 aswell i guess
ReD MiSt
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ReD MiSt
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post #6 of 6
Quote:
Originally Posted by Asus11 View Post
i think hes right^, i need to start messing with ram timing to get 4.3 aswell i guess
Hi,

Whats going to hurt you though, is AIR to go any further.

Just nature of the beast, or a really cold computer room.

Later
Works for me
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Crucial 128 M4 Boot-WD 640 Sata3 Storage Plextor/ Samsung 600.5- 3 Rads-Micro Rez-355 Pump Win 7 64 bit he 
MonitorKeyboardPowerCase
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Works for me
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i7-930 4.51 HT on Asus P6X58D-E Sapphire 7970 OC Edition 1250/1650.1.200v Corsair Dominator 1600@1723 
Hard DriveOptical DriveCoolingOS
Crucial 128 M4 Boot-WD 640 Sata3 Storage Plextor/ Samsung 600.5- 3 Rads-Micro Rez-355 Pump Win 7 64 bit he 
MonitorKeyboardPowerCase
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