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ASRock Z68 PRO3 i2500k: Searching for stable 4.5GHz

post #1 of 22
Thread Starter 
Have been searching for a stable 4.5GHz with the system in my sig. Google Spreadsheet of my attempts so far
  • Are there other settings I should be trying instead of upping ATV and VCORE?
  • When should I up ATV and when VCORE, benefits/downsides to each?
  • Multiplier is 45x but spends most of the run at 42-43x, do I need to adjust something?
  • Should I adjust the long/short power durations?

161b4uc.jpg
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Edited by fxer - 8/20/11 at 5:57pm
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post #2 of 22
Thread Starter 
Still failing after a few hours with vcore +offset at 0.025v, how high might I have to take this thing to get a stable 4.5GHz? Other settings updated in spreadsheet.
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post #3 of 22
Perhaps, try a firmer LLC level like 3 or 2.
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post #4 of 22
Quote:
Originally Posted by fxer;14658697 
Still failing after a few hours with vcore +offset at 0.025v, how high might I have to take this thing to get a stable 4.5GHz? Other settings updated in spreadsheet.

Try manual vcore and start at 1.25 and keep going up, thats alot of vcore for those clocks
post #5 of 22
I have the same board and processor at the same clock speed. I tested stability with Prime95 at 12+hours. It's been working flawlessly since. Here, these are my settings. Hope it helps!

http://www.overclock.net/14635350-post2910.html
     
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post #6 of 22
Thread Starter 
Quote:
Originally Posted by evilDSM;14660390 
Try manual vcore and start at 1.25 and keep going up, thats alot of vcore for those clocks

If Prime95 can fail while vcore is providing 1.344v how could setting it back to 1.25 improve performance?

Quote:
Originally Posted by MacClipper;14660350 
Perhaps, try a firmer LLC level like 3 or 2.
Are there downsides to switching LLC from (what appears to be default) of 5? If I change LLC should I lower vcore/atm at the same time?
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post #7 of 22
try enabling manual turbo boost power limit like wanako did and try his settings "250/250/1". could explain why your multi is dropping
post #8 of 22
Thread Starter 
Quote:
Originally Posted by wanako;14660636 
I have the same board and processor at the same clock speed. I tested stability with Prime95 at 12+hours. It's been working flawlessly since. Here, these are my settings. Hope it helps!

http://www.overclock.net/14635350-post2910.html

Thanks wanako, it looks like your vcore +offset is 0.090 but it's been mentioned here mine seems to high already at +0.040? Also are all the settings under Voltage that aren't set to Auto really necessary? Are the short/long power durations at 250W too much?
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post #9 of 22
From what I've been reading, If you don't set your power limits to that level your processor will not receive enough power. I'm very new to overclocking so I did intensive reading. In fact, I've read just about the entire "Stable Sandy Bridge Thread" before I started overclocking and I've noticed that power limit as constant advice from member "munaim", the OP of that thread. Apparently he's a respected overclocker, from what I've seen and his rep count.

IGPU voltage I have not touched It was fixed like that from factory.
VTT Voltage I got from a BSOD error that told me to increase it. So I did.

As far as Offset voltage, I also had my offset similar to yours at the beginning, with a x45 multiplier, and I couldn't get past the Intel Burn Test. It always gave my a BSOD for more Vcore. I read around a bit and I've noticed that ASRock boards require more offset than some others. Don't know why, but it's a pattern I've seen while searching the boards.
I tried running the offset at +.080V and +.085V and I'd STILL get BSOD's asking for more Vcore, but this time with Prime 95. I had passed the Intel Burn Test at that point. Finally bumped it to +.090 and it worked excellently.
Hope that helps.
Edited by wanako - 8/21/11 at 1:47am
     
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post #10 of 22
Thread Starter 
Thanks wanako/sbuck33 my multiplier doesn't jump around anymore since I set ATV to auto so that's one problem fixed.

Prime95 failing at offset +0.030. You said you were getting BSODs though? On a number of my tests Prime95 halts on one or more cores at different times citing an error but the computer doesn't actually bluescreen.

Spreadsheet updated with more tests
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