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Can't get 2500k stable at 4.0ghz :(

post #1 of 21
Thread Starter 
Hey, well I'm new to overclocking and I am having some trouble.

PC Specs
i5 2500k
Gigabyte Z86X-UD3H-B3
Crucial 2x2GB CT25664BA1339 RAM
2x GTX 570s in SLI

Without changing any settings except the multiplier to 40x I then run Prime95 and it freezes my PC after about an hour.
I tried using someone elses settings since they had the same mobo and cpu as me and it managed to run Prime for 8 hours until it froze again frown.gif
Even upping my vcore doesn't seem to help and I don't know what to do. So I thought I'd ask you guys smile.gif

Oh I have my RAM set at 1.6v because for some weird reason my PC would randomly freeze every couple of minutes to a few hours until I found this solution.

Some pics of my BIOS.

448

448

The settings on here are the ones someone else had that I thought I'd try. And the options to the left is "normal" and the right is "current"
448

Thanks for any help.
post #2 of 21
Set the DVID to +0.060V then lower it while testing to see if it's stable.
post #3 of 21
Thread Starter 
Okay I'll try that. Should I do a prime blend for like 12 hours or what?
post #4 of 21
I use prime 95 for whenever I overclock so yep I would. thumb.gif
post #5 of 21
Thread Starter 
Well it may not be 12 hours worth, but I did a custom blend at 2500Mbyte ram and the 1344 and 1792 FFTs, both for 20 mins with no errors so I will try a 12 hour tonight.
At the moment I'm just trying vcore at 1.26. Could it potentially be unstable after hours because my ram is set to 1.6v?
post #6 of 21
I'd use LinX, run 7 Runs, you don't have to use all of your available RAM...

If it errors before you get to 7 runs, you are definitely not stable, change voltages...

Once all of the 7 runs are stable, meaning they are very close to one another in time (w/in 1.5 seconds or less), and the results are generally very close to one another (meaning GFlops), then you should be stable...

Run Prime95 for 12 hours after that...

It's a slow process to find the right voltages for a particular clock speed, but it's crucial to find the precise stable voltage...

LinX will post an error faster as the test is MUCH harder than Prime95, so you don't have to try X hours before you find an issues, if the results aren't the same then most likely voltage isn't stable...\

Ideally you should give slight bumps or decreases in voltage till you find that ultra stable place where all of the 7 runs are generally the same, then do your long term test to ensure stability..

Hope that helps..
Edited by _GTech - 3/29/12 at 9:41pm
The Rock
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The Rock
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post #7 of 21
stock cooler? mine wouldn't stay stable at 4.0 either until i submerged Snorkle.gif

Now I hit 4.7 stable 24/7 with ambient ~70*F biggrin.gif

I recently built a 2500k rig for a friend with a CM Hyper 512 cooler (30$ us) and he sits at 4.5 stable 24/7
BLACK!CE
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BLACK!CE
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post #8 of 21
i noticed your BCLK was at 100.3
If you changed it I advise you to change it back to 100.

Because In my experience i was able to hit 4.0 Ghz at 1.165. I don't have a 2500k but overclocking a SB-E and SB is virtually the same
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SlowGrow
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post #9 of 21
Lol your mother board comes with a auto overclocking program called easy tune 6 or something and Just hit the twin turbo Overclock button, and it kicks it to a stable 4.1ghz haha. Ez mode I know but still..,. tongue.gif
bankaikiller
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bankaikiller
(16 items)
 
Bankai laptop
(11 items)
 
Glowing Reaper
(15 items)
 
CPUMotherboardGraphicsRAM
I5 2500k @4.1ghz Gigabyte GA-Z68A-D3H-B3 (3waysli) 2 gtx 560 ti's evga super clocked G.Skill 8gigs 
Hard DriveCoolingOSMonitor
500gig 7200rpm hdd + corsair force gt SSD 120 gig corsair h60 Windows 7 acer S231HL 
PowerCaseAudioOther
800 watt corsair NZXT Tempest EVO  USB Creative sound blaster X-FI Go Pro Razer Carcharias headphones 
CPUMotherboardGraphicsGraphics
AMD K12 quadcore processor 4MB l2 cache 358D AMD Radeon(TM) HD 6620G integrated  AMD Radeon 6750M dedicated (crossfired with 6620g) 
RAMHard DriveOptical DriveCooling
6gigs 640 5,000 RPM Blue ray player Coolin pad and hp coolsense tempature control 
OSKeyboardAudio
Windows 7 Asus Beats 
CPUMotherboardGraphicsRAM
Phenom 6core 1045T @ 3.2 Ghz ASUS M4A89TD PRO/USB3 AM3 AMD 890FX Amd radeon 6870 8gigs ddr3 1600 
Hard DriveOptical DriveCoolingOS
1TB sata Barracuda Compact disk DVD+RW air  Windows 7 
MonitorKeyboardPowerCase
S231HL LCD Monitor Asus 800 Watt corsair GS 800 Roswell 
MouseAudio
Asus realtek 
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post #10 of 21
Thread Starter 
I would use Easy Tune, but it won't install anymore lol.
Haven't touched the BCLK, it was just like that.
I shall give linx a try then.
Nope, not a stock cooler, I have the Cooler Master V6. Highest temp I've seen it at is 60° C.
Thanks for all the replies fellas smile.gif
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