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2500k at 4.5 freezing in Prime 95 - Page 3

post #21 of 28
Thread Starter 
Tunagoblin:
I tried ur method and I got a fatal rounding error again on the third core on on its 10th test, so it seems that its fft length 1344k that is causing me this issue
How shall I resolve this

Thanks for the replies guys, I also changed my LLC so idle vcore is 1.38 and load is 1.36, I tested it at lower volts and the same issue happened, so I don't know how to solve it
Also I stressed 4.3 and after 3 hours core 3 on that failed too, load vcore for that was 1.28

I am now going to run stock clocks at 1344 and see if its a faulty cpu
Edited by A14M3D - 8/7/11 at 9:34am
post #22 of 28
what i'd do:

try vccio to 1.150, disable c1e,c3,c6 and speedstep, leave LLC on ultra high/75%, all other voltages normal/auto (set your ram voltage though)

set vcore manually to 1.35, check in cpu-z that it is around this value, try a 40multi

run ibt 20 times, if it passes you know you have enough vcore,

now run prime blend, if it fails you've got a memory problem somewhere, try one stick at a time, see if it passes prime blend (ive heard people have issues with 8gb of ram but are fully stable with 4?)

report back
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My System
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post #23 of 28
Quote:
Originally Posted by A14M3D View Post
Tunagoblin:
I tried ur method and I got a fatal rounding error again on the third core on on its 10th test, so it seems that its fft length 1344k that is causing me this issue
How shall I resolve this

Thanks for the replies guys, I also changed my LLC so idle vcore is 1.38 and load is 1.36, I tested it at lower volts and the same issue happened, so I don't know how to solve it
Also I stressed 4.3 and after 3 hours core 3 on that failed too, load vcore for that was 1.28

I am now going to run stock clocks at 1344 and see if its a faulty cpu
ffts 1344 and 1792 are particularly hard to pass for SB.
Check out the Sandy Stable Club on my sig.
You can compare your system with others by voltage, clock, cooling, etc.
Very useful linsting is there.

Did you try it with 6500MB ram or standard 1600mb ram?
Usually you just need to bump up the vcore will solve it.
But even you doing that and keep getting errors, your RAM is holding back or maybe can't handle the OC.
You can try bumping up VTT and dram until you don't see the error.
But in that case you usually see BSOD 124.
So it might be just your RAM.... not sure till you test it again...
i5 2500K GTX570HD
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i5 2500K GTX570HD
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post #24 of 28
Moar volts!
x99 Liquidx
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post #25 of 28
Thread Starter 
I will try your method
My ram is fine I've done memtest on it and it passed
Many ppl with this ram kit have hit even higher clocks than 4.5ghz
Right now I'm testing 4.2 at 1.31v load
I'm going to stress by doing 2 15 minute runs at 1344 then another 2 15 minute runs at 1792both with 6000mb ram, then I'm going to do 10 runs with IBT
Good idea?
post #26 of 28
Quote:
Originally Posted by A14M3D View Post
I will try your method
My ram is fine I've done memtest on it and it passed
Many ppl with this ram kit have hit even higher clocks than 4.5ghz
Right now I'm testing 4.2 at 1.31v load
I'm going to stress by doing 2 15 minute runs at 1344 then another 2 15 minute runs at 1792both with 6000mb ram, then I'm going to do 10 runs with IBT
Good idea?
yeah, keep doing it till you hit the desired clock and voltage.
i5 2500K GTX570HD
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i5 2500K GTX570HD
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i5 2500K @ 4.8GHz 1.384V AsRock P67 Extreme4 (B3) UEFI3.19 EVGA GTX 570HD SC 930/1950 G.Skill RipjawsX DDR3 PC12800 2x4GB@1866 9-10-9-28 
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Crucial M4 SSD 128GB, 1x 500GB WD, 2x1TB WD Samsung DL DVD Writer Noctua NH-D14 Windows 7 Ultimate 64Bit SP1 
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post #27 of 28
Quote:
Originally Posted by A14M3D View Post
I will try your method
My ram is fine I've done memtest on it and it passed
Many ppl with this ram kit have hit even higher clocks than 4.5ghz
Right now I'm testing 4.2 at 1.31v load
I'm going to stress by doing 2 15 minute runs at 1344 then another 2 15 minute runs at 1792both with 6000mb ram, then I'm going to do 10 runs with IBT
Good idea?
is your 12hour blend stable overclock unstable?? your rocking the "stable club" in your sig, but dont see you anywhere on the list lol
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it looks alive
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post #28 of 28
Thread Starter 
Managed to get 4.3ghz to pass 2 15 minyte runs at 1344 and 3 runs at 1792
Idle voltage is 1.36v and load is 1.31v
It also passes 20 runs of IBT at 7100mb stress level
Max temp on any core was 64c
I also have the energy saving features enabled so when idle it only uses like 1v
Call it stable?
Edited by A14M3D - 8/7/11 at 7:26pm
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