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1 Error In Prime 95 after 9 hours and 7 Minutes in Tested.

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March 20, 2010 2:41:54 PM

Hello everyone Keiki here and I have a question for those that are professionals

Yesterday I just began to build a new system for my buddy Kou that wanted to have a new Gaming RIG
It's a Intel i5 750 Quad Core and I have overclock it to 3675.03Ghz with Turbo Boost enabled but I disables other features
like The Virtualization Tech, C1E, Execute Disable Bit, Speedstep, Spread Specturm. Now I know I can do this myself but I want to hear from you.

Core Speed 3675.3Mhz
Multiplier x21.0
Bus Speed 175.0MHz
QPI Link 3150.2MHz

This is the issue that has taken place, Now I have the Core Voltage at 1.2100V but in CPU-Z it says 1.1680V
QPI/VTT is at 1.150Voltages
RAM Voltages are at 1.640V
Yes I've overclock the RAM at 1400MHz (Ram is 1333Mhz)

Now I've ran Prime95 for 9 hours and 43 minutes for overnight, Now Core#2 stop at 9 hours and 7 minutes and said "Rounding was 0.5, expected less than 0.4 Hardware failure Fatal Error" but the other Core continue to run Prime95 after I stop it at 9 hours and 43 minutes.
I am thinking it's the RAM but I could be wrong but here is the RAM Spec

NB frequency 2800.0
RAM Frequency 700.0MHz
FSB:D RAM 2:8
CAS Latency (CL) 9.0 Clocks
RAS# to Cas Delay (tRCD) 9 Clocks
RAS# Precharge (tRP) 9 clocks
Cycle Time (tRAS) 24 clocks
Row refreash cycle time (tRFC) 78 clocks
Command Rate (CR) 2T

Now it ran for a long time without errors until 9 hours and 7 minutes. Do you think it safe to say that it would run without problems or maybe I should readjust the settings. I am thinking about making some changes in the BIOS settings.

tell me what you think.
Thanks
March 20, 2010 3:11:13 PM

After 10h of running Prime 95, you can be very very quiet. It's safe.
Is it fully stable?. No, it isn't. You can consider that a computer is fully stable after 24h without any error.
But you won't never have any problem. I'm sure. Anyway, you can try to improve your bios settings to try to adjust them and get a fully stable computer. But it's not necesary at all. It's only a pleasure...at least for me.
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March 20, 2010 3:20:20 PM

Henry Chinaski said:
After 10h of running Prime 95, you can be very very quiet. It's safe.
Is it fully stable?. No, it isn't. You can consider that a computer is fully stable after 24h without any error.
But you won't never have any problem. I'm sure. Anyway, you can try to improve your bios settings to try to adjust them and get a fully stable computer. But it's not necesary at all. It's only a pleasure...at least for me.


I've overclock many RIG's in my past and never came down to this, even 3 Intel i5 750 Quad Core RIG's in the last 3 months with the same settings and none had a error. But
this system seem to be quiet stable and I kept the system on after the prime95 ending after 9 hours and 43 minutes. To me it's fully stable but I want it to be perfect for my buddy Kou. He has been waiting on me for the last 2 days and I been working hard on this new build. Cable management and so on and so on. I even ran 3D mark06 and his score was 22367 and Crysis for an hour nothing has happen.

But what I do think is the Ram. I have it at 1400MHz maybe I should just bring it down to 1380MHz.
Kou pretty much got everything I have in my current system but the only differences in he has a ATI 5870 and I have a ATI 5850 card
But I would see what I can change. I would wait until I see more replies here
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March 22, 2010 1:40:52 PM

Keiki646 said:
I've overclock many RIG's in my past and never came down to this, even 3 Intel i5 750 Quad Core RIG's in the last 3 months with the same settings and none had a error. But
this system seem to be quiet stable and I kept the system on after the prime95 ending after 9 hours and 43 minutes. To me it's fully stable but I want it to be perfect for my buddy Kou. He has been waiting on me for the last 2 days and I been working hard on this new build. Cable management and so on and so on. I even ran 3D mark06 and his score was 22367 and Crysis for an hour nothing has happen.

But what I do think is the Ram. I have it at 1400MHz maybe I should just bring it down to 1380MHz.
Kou pretty much got everything I have in my current system but the only differences in he has a ATI 5870 and I have a ATI 5850 card
But I would see what I can change. I would wait until I see more replies here


yeah you know i would think after running p95 for about 12 hours or so, you probably could run it practically endlessly without any errors from there on out. i'm just saying that i rarely hear of people running it for more than 12 hours and experiencing problems after the fact. i think you need a bit more tweaking before i would call it stable by computer enthusiast standards, although the reality is that you are never going to do anything on your pc for 12 hours as strenuous as p95, which basically means for all useful and practical purposes, i think it's probably fine how it is.
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a b K Overclocking
March 22, 2010 2:08:23 PM

Well, since you didn't specify what Prime95 test you ran, I will presume BLEND.

Lots of ways to determine what is giving you problems:

Lower your fsb multiplier to take the cpu out of the equation and see if it's the ram.
Lower your ram and see if your cpu is the problem.
Run memtest overnight to see if it's the ram.
Run prime95 small fft so it stresses mainly the cpu.
Up the vcore.
Test,test,test.

Etc,etc.,etc............................................

PS. Using your settings for other systems, even with the same components, is just poke and hope, work up your OC from the bottom and then you will know what THAT system needs to be stable and you won't be guessing.
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March 22, 2010 10:12:00 PM

RJR said:
Well, since you didn't specify what Prime95 test you ran, I will presume BLEND.

Lots of ways to determine what is giving you problems:

Lower your fsb multiplier to take the cpu out of the equation and see if it's the ram.
Lower your ram and see if your cpu is the problem.
Run memtest overnight to see if it's the ram.
Run prime95 small fft so it stresses mainly the cpu.
Up the vcore.
Test,test,test.

Etc,etc.,etc............................................

PS. Using your settings for other systems, even with the same components, is just poke and hope, work up your OC from the bottom and then you will know what THAT system needs to be stable and you won't be guessing.


Thank for the replies everyone and taking the time to notice but as I said before I think it can be the RAM and it was the RAM.
It's fully stables now.
RJR, Yes I am sorry that I didn't clear that up with everyone about the prime95 test. It was Blend test I have done.
This time I ran it for 24 Hours and no errors, So I am pretty please with my results now. Also Memtest86 for 24 hours
Thank you for everyone's feedback here. :D 
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March 22, 2010 10:14:41 PM

Best answer selected by Keiki646.
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