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getting an i7 920 to 4.45 ghz

post #1 of 9
Thread Starter 
I have my system stably clocked at a 112 bclk. If I try clocking with a 21x multiplier, I get one of the following:
1. lockup during booting of windows--_always_ seems to occur at AVGIDSEH.sys (part of antivirus app) according to safeboot, though this is sometimes bypassed without an error.
2. It boots into Windows but locks up during a memory stress test.

This happens whether I'm at 1.35v vcore or 1.4v vcore.

I think I've tried changing almost everything without improvement. If I raise pci-e clock I have to raise pci-e voltage as well or it will freeze in the middle of POST before it shows devices.

Any suggestions? I wonder if it's a poor motherboard, since I can't get my bclk to 115 either.
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post #2 of 9
The board is the reason for the failure to post over 212 bclk, mine was the same way & needed QPI slow mode enabled to go over 212, not bad for 2d but kills framerates in 3d. Chances are good that to use the 21 multi at that bclk it may just need a big bump in vcore, my 920 will do 4.2Ghz at 1.24V, for 4.4Ghz needs like 1.35V.
    
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post #3 of 9
Thread Starter 
Quote:
Originally Posted by FtW 420 View Post

The board is the reason for the failure to post over 212 bclk, mine was the same way & needed QPI slow mode enabled to go over 212, not bad for 2d but kills framerates in 3d. Chances are good that to use the 21 multi at that bclk it may just need a big bump in vcore, my 920 will do 4.2Ghz at 1.24V, for 4.4Ghz needs like 1.35V.

Good to know why I can't get higher. As I said though, I've tried 1.35 and 1.4 vcore, and both settings display the same symptoms, so I doubt raising it further could help...
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Hard DriveHard DriveOptical DriveOS
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post #4 of 9
Thread Starter 
Looks like dropping 4.21ghz didn't help either, but I was able to gain stability by dropping channel interleaving from 6 to 5 (with no memory performance loss). I have another strange symptom now: the windows 'welcome' display stays on-screen for quite a while (10 seconds or so, normally <1), then the screen briefly flashes black and it proceeds as normal. I get lock-ups after running games for a while, so it seems display drivers/pci-e related. Maybe fiddling with pci-e settings (voltage, frequency, clock drive) will help...
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post #5 of 9
Not sure about clocking on a gigabyte board but 200x21 and 205x21 (4.2 & 4.3) have been pretty easy to do with an i7-950 and i7-970. 200x21 is what I use now 24/7 at 1.3vcore LLC full calibration.
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post #6 of 9
have you tried loosening your ram timings? I'm at 4.4 atm for gaming though using offset settings ....
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post #7 of 9
Some good 920's as my lapped 930 takes more voltage at that clock.

Here's 4.3
On three Rads and 600.5 of them.

381





And 1.42 for a stable 4.5.

Later
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post #8 of 9
Thread Starter 
Seems raising ICH core by .1v stabilised things greatly (at 4.21 ghz, going to aim lower first before attempting 4.45); no more lockups after gpu-intensive work. Not sure why the ICH core, given what it does and how seldom people recommend changing it, but there you have it. Will see how it goes.
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CPUMotherboardGraphicsRAM
i7 920 SLBEJ OC'd @ 4.4 ghz Gigabyte GA-EX58-UD3R Rev 1.6 MSI GTX 780 twin frozr Kingston HyperX 2000mhz @ 1600mhz 6-6-6-16 
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Contuter
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CPUMotherboardGraphicsRAM
i7 920 SLBEJ OC'd @ 4.4 ghz Gigabyte GA-EX58-UD3R Rev 1.6 MSI GTX 780 twin frozr Kingston HyperX 2000mhz @ 1600mhz 6-6-6-16 
Hard DriveHard DriveOptical DriveOS
Seagate Barracuda 7200.12 1TB SATA-2 Samsung SSD 840 EVO 120GB Samsung SH-S223B/BEBE 22x DVD±RW SATA Dual Layer Windows 7 Home Premium 64 bit OEM 
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post #9 of 9
Thread Starter 
Quote:
Originally Posted by wirefox View Post

have you tried loosening your ram timings? I'm at 4.4 atm for gaming though using offset settings ....

They're very tight right now and I want to see if I can keep them that way. As I said, dropping interleaving by 1 helped a lot without any decrease in ram bandwidth scores. Interestingly dropping it by more than 1 increment _did_ decrease performance dramatically; even booting was visibly slower.
Contuter
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 SLBEJ OC'd @ 4.4 ghz Gigabyte GA-EX58-UD3R Rev 1.6 MSI GTX 780 twin frozr Kingston HyperX 2000mhz @ 1600mhz 6-6-6-16 
Hard DriveHard DriveOptical DriveOS
Seagate Barracuda 7200.12 1TB SATA-2 Samsung SSD 840 EVO 120GB Samsung SH-S223B/BEBE 22x DVD±RW SATA Dual Layer Windows 7 Home Premium 64 bit OEM 
MonitorPowerCase
Dell U2410 Cooler Master m700 Real Power Cooler Master Centurion 590 
  hide details  
Reply
Contuter
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 SLBEJ OC'd @ 4.4 ghz Gigabyte GA-EX58-UD3R Rev 1.6 MSI GTX 780 twin frozr Kingston HyperX 2000mhz @ 1600mhz 6-6-6-16 
Hard DriveHard DriveOptical DriveOS
Seagate Barracuda 7200.12 1TB SATA-2 Samsung SSD 840 EVO 120GB Samsung SH-S223B/BEBE 22x DVD±RW SATA Dual Layer Windows 7 Home Premium 64 bit OEM 
MonitorPowerCase
Dell U2410 Cooler Master m700 Real Power Cooler Master Centurion 590 
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