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I2500K will not post @ given clocks or voltage after failed Prime test

post #1 of 13
Thread Starter 
Hi,

I feel i bit bad as I have been using this site for reference forever (It is amazing) and am yet to be able to offer any help myself. Still i'm sniffing for help on my firstish post so sorry!

As stated above I'm overclocking my 2500K using offset +0.60v @ 4.7 (1.392 - 1.400) I ran prime for around 7 hours when the oc failed showing bsod 124 now the pc refuses to boot at those clocks or at that voltage. I have increased the voltage and have tried using a fixed core (1.45) and still no joy at all, it will not even post @ 4.6/7

I have now gone back to 4.5 using an 0.25 offset and all seems fine ...... I'm just perplexed I have no idea why this should be the case?

Any help you can offer would be greatly appreciated I'm sure one of you chaps will know what happening here...

Thanks in advance
Edited by gerbil80 - 2/28/12 at 8:05am
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post #2 of 13
Clear CMOS and try again.

However, this has happened to me and I ended up using a lower clock at lower voltages
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post #3 of 13
Clear CMOS/load optimized as mention above should help ,can you post your bios settings
    
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post #4 of 13
Thread Starter 
450

450

450

These are my bios setting at the minute... stable @ 4.5, these setting were the same while testing @ 4.7 with an offset of 0.60 I was just going to increase the VVT a touch after the bsod 124 until I had this problem of no POST above 4.5 at any setting.

Thanks for taking a look!
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post #5 of 13
Thread Starter 
Quote:
Originally Posted by vs17e View Post

Clear CMOS and try again.
However, this has happened to me and I ended up using a lower clock at lower voltages

I'll give that a go .... I'm thinking that it may have to settle for lower clock as you suggest. At 4.7 the temps were looking good though below 70 and all seemed pretty good hence my frustration.
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post #6 of 13
Quote:
Originally Posted by gerbil80 View Post

450
450
450
These are my bios setting at the minute... stable @ 4.5, these setting were the same while testing @ 4.7 with an offset of 0.60 I was just going to increase the VVT a touch after the bsod 124 until I had this problem of no POST above 4.5 at any setting.
Thanks for taking a look!

Well, some chips simply wont go much past 4.5. I had one that wouldn't, and ended up returning it to MC and getting another. Now I can do 4.80-5.0 fairly easily, though I stick to 4.5 at a good voltage. Maybe try fixed voltages at around 1.39-1.4 and see what you get.
post #7 of 13
I'm thinking its a bug with the BIOS, I was 8hr into prime95 @4.6GHz, I went to reboot and I simply lost x46, I couldn't boot to it, I could boot to 45, 47, 48, 49, 50 but not 46. A few days later I started tweaking my BIOS again and after saving to default and loading an old setting I got x46 back so it could be a BIOS bug or the settings not sticking.
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post #8 of 13
Thread Starter 
Quote:
Originally Posted by UZ7 View Post

I'm thinking its a bug with the BIOS, I was 8hr into prime95 @4.6GHz, I went to reboot and I simply lost x46, I couldn't boot to it, I could boot to 45, 47, 48, 49, 50 but not 46. A few days later I started tweaking my BIOS again and after saving to default and loading an old setting I got x46 back so it could be a BIOS bug or the settings not sticking.

You maybe on to something there, first off I tried all of the auto optimised settings and the 4.6 was a problem but 4.8 was fine although the temps were quite high, so I went for half the mark 4.7 and that was when this occured, now anything above 4.5 is a no go as stated in my OP. I suppose resetting the cmos as someone else suggested will solve this?
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post #9 of 13
Ive seen a few people with this issue on ASRock boards, me being one of them.

Do you get past the BIOS screen and just get a black screen with a blinking cursor?

I was stuck at 4.4 and recently got it booted above that again only to have it get stuck on the black cursor screen, instead of hitting the power button and shutting down I tried the reset and it booted into windows and has been folding since. I haven't rebooted yet but it may work for you, basically make it reboot but not go all the way down once its stuck.

I sent ASRock a very detailed submital to their tech support about 2-3 weeks ago on this and haven't heard back.
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post #10 of 13
first clear Cmos
0x124 = increase/decrease vcore or QPI/VTT...have to test to see which one it is
Try this ;
-for 4Gb RAM i would try 1.08v~1.1v/Dram voltage 1.55V (you can go straight to 1.08v and Dram voltage 1.55v no problem )
you can also try;
-Disable (thermal throttling/spread spectrum/Intel virtualization technology <= if you don't need it)
-try different LLC level
    
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