stable 4ghz from i7 920 d0 and ex58 ud5

Harty

Harty

Harty

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Joined
8 Apr 2010
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44
Location
Edinburgh
hi all,

been reading this forum for some time now just never posted.
i bought the i7 bundle from OC in november to build my new gaming rig but cant seem to get past 3.8ghz without having to put the vcore through the roof and still getting nowhere ranging from random restarts and blue screens with 0009c errors which i cant figure out if i could maye get a push in the right direction from you guys it would help a lot. my specs are as follows:

i7 920 d0 stepping 'bloomfield'
noctua fan(forget which model)
antec 1200 case
ex58 ud5 gigabyte board
corsair xms trichannel kit rated at 1600mhz

bios is set up right now at 3.8ghz
fsb - 200
multi - x19
HT/all C states/visualisation/turbo - disabled
uncore - x17(3400)
qpi - x36(3600)
ram multi - 8(1600)
timings - 9-9-9-24-2T all else on auto for ram
voltages:
vcore - 1.25000
cpupll - 1.86
qpi - 1.335
dram - 1.780
all other volts set at normal for pcie and such

any help here would be greatly appreciated! :)

thanks,
Chris
 
I had blue screens when using Prim95 at 200 x20 on a Rampage II Extreme. I managed to get it stable when I upped the QPI from 1.335 to 1.35. No problems there after! Oh, and is that a safe voltage for your memory? Thought 1.65v was the recommended voltage before you'll have issues with your CPU...
 
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d3m0n edge - your sig is to big, max 4 lines of standard text ;)

Did not see the DRAM voltage, max recommended voltage for i7 setup's is 1.66v ~
 
Put the Dram voltage to 1.66 as said above!
Then try the following:
FSB: 190/191
Multiplier: 20
HT + Turbo = Enabled
VCore ~ 1.31

Also, check that you have one of the Overdrive (Or something of a simillar name) Setting in the BIOS set to standard. I think it comes on Turbo (as starndard) and the other option is Extreme.
If you have it on Turbo or Extreme it'll interfer with your OC.

Note. I know that 190x20=3.8 That's what Turbo boost is for ;)
 
You dont mention how much vdroop you experience in your initial post. What PSU do you have?

I am using level 2 LLC with 1.200v (BIOS Set) for 4ghz. When loading with Prime the LLC kicks in and increases the vCore to 1.216v.

This way you get the best of both worlds, lower temps at idle and more juice when you need it.

If you are stuck and clutching at straws, start from scratch. Here's a decent post from another forum that might help.

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1st I would see about just getting you cpu over 4ghz. I would set mem to 8x uncore to 16x qpi to the low setting (which I believe is 4.8) vcore to around 1.3 turbo on vtt to 1.26 mem voltage to 1.65 and turn HT off.
With those settings I would guess you should have no trouble getting over 4 gigs with a bclock in the 190 to 200 area. If you have trouble you can try to change the multi to 19 and see what bclock you can get that way to see which mutli your chip seems to like best.

After that you can start with your mem (may need to up the vtt for that and maybe the mem voltage also) buy upping the ratio and the uncore multi also (needs to be a minimum of 2:1 between uncore and memory) also I would lower the cpu multi durring this to keep cpu stability out of the equation.

Once you have found these limits you will have a good idea on your max settings and can look for your max cpu with HT on (knowing what settings are max and work best for your setup see what has to be done to get close with HT on) you may only need a bit more vcore (I would try to stay under 1.40) or you may need to drop the multi or bclock down until you get stable with these settings.

From that point it is mostly just tweaking to get the max out of those setting like best mem ratio/speed with timings qpi speed all with keeping voltages as low as possible and being stable.

The main voltages that make the most difference are vtt (which can be listed as QPI/Vtt) mainly needed with high mem speeds your vcore and vdimm. I have found very little help from raising any of the other voltages so I just leave them at default. vtt and mem voltages have to stay under 0.5v difference and depending on each setup .2~.4 usually seems best.

For my 24/7 setting this is what I have come to use.

bclock 195
Turbo enabled
HT off (I use no software that uses more than 2 threads and don't need the extra heat of aprox 12 degrees under load that it brings)
vcore at auto + 6%
all power saving settings turned on
vdrop/droop allowed
8x 16x for mem and uncore settings

I have tested these setting stable up to 198 bclock and have lowered to 195 as a little margin since just one crash could cost a few hours of work to be wasted.

With my settings I get an idle voltage as low as 1.14 (it varies but usually at 1.15) and load of 1.312 which helps with heat for 24/7 operation.

I hope this helps and since we have different MBs the terminology of the setting can be different but will do the same thing.
 
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Disabling vDroop solved all my problems, up the vCore to almost 1.3v bclock 195, turbo on, hyperthread on, ram 1.65 max, i got mine 1.61, lower the memory multiplier to a safe amount, and then make the uncore twice the memory speeds, might want to raise uncore voltage 50mV or so, turn on speedstep

Lower the PLL to 1.6 or so, people have gained stability increases from lowering it
 
hi all thanks for all the replies, i've tried all these suggestions and its all exactly the same... i get either blue screens with 0009c code, 0101 code or 0001b code, just instant to near instant resets or just plain hanging followed by a reset.

tried intel burn test and any settings i tried, rarely made it through a standard burn without dieing and as for prime, turns out my settings for 3.8 "stable" reset the second i pressed start and all of the other settings i tried died seconds into a blend.

think i may have gotten a duff cpu:(.

think im gonna have to start from scratch and work it up slowly which kills me:(
anyone got any ideas where to start from or any other suggestions?

Thanks,
Chris
 
Before overclocking do a stress test with everything at stock, I had a problem on my build with it failing stress testing at stock, my 2nd set of memory was faulty.
 
The computer will shut down or BSOD if it gets too hot, also turn off automatic reset in control panel, may want to turn off auto shut down in BIOS.

I wouldn't try overclocking straight into it, you can be lucky, but doesn't look that way, best bets are to see what you can get stable on stock voltages, then up the voltage, see what you can get on that, and up again.. until you get it stable..

Other way is if you have 4GHz set in your mind, set the Bclock, disable all the hyperthreading and turbo mode, etc.. keep testing and raising the vcore until it's stable, raise the uncore a bit, do whatever you want on the PLL, keep ram default or a tiny bit more, up the qpi a little, make sure the memory multipliers aren't too high, once you got it stable, you might want to try turning on hyperthreading, test it again, if unstable, raise vcore again, and you should be fine.

You don't need dram more than 1.65 or 1.66 if you don't have the 1.65 option, but lower than 1.65 should be fine, vcore shouldn't go above 1.35 but personally I keep mine below 1.3 on 4.1GHz, you raise the vcore a little bit and the temperature goes up, on my system I noticed roughly a 3 degree increase per 10mV
 
try setting ur qpi voltage to 1.4 V or above i had to do this with my 920 do to get 4.4 GHZ

currently got my qpi set at 1.6V to get my 950 stable at 4.6 GHZ and its been like that for months with no probs

think people worry to much about killing there cpu i tried killing my 920 a few times set all the voltages to max guess what it would not post reset bios and hey it worked not a scratch lol

And make sure that crappy intel turbo option is disabled
 
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It's not really a crappy option, just means you need to take into account the extra multiplier. Just means you need to up the voltage according to the core clock:vcore ratio, but I'd always disable it first and then turn it on once you overclocked stable and then retest
 
Yjani said:
Works fine on mine, has done for nearly 6 months, mine is DO-Stepping
Click to expand...

Your speed looks fine so you must have got it to work lol.. but I dunno why everyone goes to 1.35v, you shouldn't need more than 1.3v on most 920's, you just need to change the uncore and PLL, maybe ram voltages, etc.. a tiny tweak of each to gain stability rather than forcing voltages onto the CPU, I have seen people above 1.4 though on less than 4GHz :rolleyes:
 
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