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Guide to Overclocking the Core I7 920 or 930 to 4.0ghz - Page 84

post #831 of 1477
gonna try that out now. the biggest / smallest problem is that the system crashes at random times, not during any benching, ie. when i watch a flash video or exit out of a game
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post #832 of 1477
Quote:
Originally Posted by DarkMeld View Post
gonna try that out now. the biggest / smallest problem is that the system crashes at random times, not during any benching, ie. when i watch a flash video or exit out of a game
That could be anything. The question now is whether or not that happens while your system is NOT overclocked. If it happens while not overclocked, you may want to try running memtest if you haven't already. If you can get at least 2 passes without any errors with all sticks, then you should be fine. If you get errors before 2 passes, try testing each stick individually. Now if you're having absolutely no problems with the RAM, then my only other suggestion that I can think of would be to purchase a PSU tester and test your PSU. If you've tried all these already, my apologies in advance.
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post #833 of 1477
Thread Starter 
Guys for the millionth time you can run your ram at 1.7. You have droop on your ram as well. You just have to be within .5 of the qpi/uncore. It's also not going to increase your systems power usage by more than a few watts.

Also, darkmeld, if your system is crashing in those situations it sounds like your video card may be the culprit, but you should just, as kuya said, try setting everything to stock then slowly reenable various overclocks to see what the culprit is. Sometimes games/flash just crash cause they are unstable. If you passed 16+ hours of prime it's probably not your cpu.
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post #834 of 1477
thanks for the tips. I was thinking the PSU as well because I was running on much lower voltages stable before i installed a 470gtx.

I also noticed my cas changing itself from the 8 i set to 9 or even 10 so I did the irrational thing, lol, and tightened my timings from 8-8-8-24 2T to 7-8-7-20 1T. i just ran 2 passes in memtest and no errors.

For now everything seems a-ok. I'm not a big fan of burning electricity on a long prime run but I may have to eventually if it keeps crashing.
Edited by DarkMeld - 7/18/10 at 7:01pm
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post #835 of 1477
Quote:
Originally Posted by DarkMeld View Post
thanks for the tips. I was thinking the PSU as well because I was running on much lower voltages stable before i installed a 470gtx.

I also noticed my cas changing itself from the 8 i set to 9 or even 10 so I did the irrational thing, lol, and tightened my timings from 8-8-8-24 2T to 7-8-7-20 1T. i just ran 2 passes in memtest and no errors.

For now everything seems a-ok. I'm not a big fan of burning electricity on a long prime run but I may have to eventually if it keeps crashing.
If you're just running a single 470, your 600w PSU should suffice. Either way, I would definitely pick up a PSU tester (only about $15).

If you ever make small changes, I would recommend running 5 passes of IBT on Maximum. If you have HT enabled, run with 8 threads; otherwise, set it to 4. I think there's a bug with the software such that if you leave the threads set to auto, it will crash. If you pass 5 passes, then go for the long 16+ Hour P95 test. Testing with IBT first should help perform a quick stability test so that you're not wasting time with P95 initially.
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post #836 of 1477
Prime 95 stable but getting errors on Linx after 5 or so passes. Also random Error 124 BSOD's.

I7 930 w/D0 Stepping @3.8Ghz
Vcore 1.225
PLL 1.84
QPI 1.26875
DRAM BUS Voltage Auto (CPU-Z reports it's at 1.5. RAM is rated at 1.5 by mfr.)

Any advice?
Edited by xynder777 - 7/19/10 at 6:23am
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post #837 of 1477
Quote:
Originally Posted by DarkMeld View Post
These voltages and still getting 124 error! I've stepped the QPI from 1.2 to where it is now

BCLK: 200mhz
Multi: x19
Vcore: 1.275v
DRAM Bus: 1.70v
QPI/DRAM core voltage: 1.375v
CPU PLL: 1.80v
ICH: 1.1v
IOH: 1.1v
LLC: Disabled

What should I change? I'm running 6x2gb at 1603mhz which definitely has something to do with it
Probably Vcore or QPI/DRAM .. Raise Vcore up to 1.28-1.3 as well as ICH and IOH to 1.24.. Search for rated QPI/DRAM requirement at RAM at stock on UD7 and perhaps raise two or three notches.. Otherwise just set to 1.45. Note if 12g or 2000 ram your may require up to 1.59. Anyway find stability and then lower. Also set ram to stock.. i.e voltage and timings and then up the ram two notches.. XMP is fine as your not doing anything special..

I'm confident you'll get a decent result. Given your RAM / CPU
aren't duds, but to be honest your settings are more than a tad on the conservative side.. They 'may' work at such low voltages, but less likely than not.

You can stress test with IBH or Prime for only an hour or so. Then either wait for a crash until your satisfied or lower your voltages straight away, stress again etc until you find optimal stability. Now put her to use use and wait it out..

As a bonus you can lower your CPU PLL to 1.7 .

AND FOR THE LAST TIME Don't work up in small increments to find a midrange OC.. As this is a misconception. Only when your pushing your temp and bandwidth - do you tiptoe. Raise voltages a moderate level and then work backward.. I will explain.

You want to find your absolute best performance.. The bottom line is you'll need to try different approaches which means starting over a few times.. Know that you will get a good feel for your rig and can only then truely hone your system to its optimial settings through a methodical approach.

Remember to be moderate and know the basic principles such as safe temps, volts. Reference at least a half dozen examples and it helps if they include various approaches.. And ask yourself questions, like If you raise ICH quite a bit (1.42-1.5) then i've found one could lower Vcore considerably thus reducing core temps.. However observing my system temps include NB would be raised.. having a a large and well ventilated case 'may' be one of many solutions..

Use your senses as well as science and in time your rewards will be just.

Most importantly.. Ask questions and consider everyones opinions but make up your OWN mind.
Edited by gobbo353 - 7/19/10 at 4:49am
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post #838 of 1477
I've been trying to experiment with load line calibration. I've learned that when I disable it, I need higher voltages for it to run stable. At the same time, the temperatures seem to drop some degrees, despite having raised the voltages. Is it known what's more beneficial when ocing? LLC off or on? ATM I don't have time to experiment myself, so would be helpful to get this knowledge from someone who knows.

edit: Ah, I read the article and found the answer. I'll have to try some tweaking with it disabled.
Edited by arnie - 7/19/10 at 9:51am
post #839 of 1477
Quote:
Originally Posted by arnie View Post
I've been trying to experiment with load line calibration. I've learned that when I disable it, I need higher voltages for it to run stable. At the same time, the temperatures seem to drop some degrees, despite having raised the voltages. Is it known what's more beneficial when ocing? LLC off or on? ATM I don't have time to experiment myself, so would be helpful to get this knowledge from someone who knows.

edit: Ah, I read the article and found the answer. I'll have to try some tweaking with it disabled.
I usually just set it at LLC 1 as it may translate to more efficient and stable overall vcore..

Otherwise at normal, you usually need a litte more to cater for vdroop. Further under load voltage usually sits near orginal bios..

Conversly i've heard that 2 is only really good for benchmarks otherwise your underlying voltages can be a tad high.. under load you may also experience voltage spikes higher than your original bios setting, which 'may' not be good for components. depends though how close the the limit your system already is .. I used LLC2 for a while while checking stability at 4.45 and 4.5 before tweaking and then ultimately lowering to LL1 for 24/7 @4.45. i wasn' successful at stable 4.5 but am still trying.. however be it idle or under load the voltage was constant and near orig bios setting
Edited by gobbo353 - 7/20/10 at 12:07am
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post #840 of 1477
Hi guys,i'm new in this overclocking thingy but i hope someone able to help me.Cos i accidently adjusted the PCIE frequency then, i used CPU-Z to monitor i7 930 found L3 cache show not active.Is there anyway to rectify it? i will very appricate someone can help million thanks.
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