Prime95 how to get it to run 24 hrs?

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mark_k

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Dec 31, 2008
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I am new to testing and I can not get Prime95 to run over night.

I run it and select Blend and the number of T Tests is set to 8.
It will run for around 1 hur then the PC reboots.

The results say pass on everything.

How do I get it to run for longer than 1 hours?
Should I get it to run longer?

Thanks

Mark
 
Antec 900, ASUS P6T DELUXE, SLI x2 EVGA GTX280, KINGWIN Mach 1 ABT-1000MA1S Modular,CORE I7 920 OCed (2.66 -> 3.6 GHz),Corsair TR3X6G1600C8D,WD Caviar Black 640GB, CoolerMaster V8

CPU Ratio Setting: 20.0
BCLK Freq: 180
PCIE Freq: 100
DRAM Freq: DDR3-1443 MHZ
UCLK Freq: Auto
QPI Link Data Rate: Auto

Dram Timming Control Auto

CPU Voltage: 1.30
DRAM Bus Voltage: 1.64

 
If I stay on the PC and serf the net the test continues for hours.

However, If I walk away from the PC and just let it run on its own whem I come back in about 1.5 hours I see that it rebooted.

Is the PC going to sleep or hibernating?
Will Prime95 prevent this from happing?

Maxtepms:
69 68 69 66

update:

I changed the setting in control panel to not let it go to sleep.
been running for 3 hurs now and no issues.
 
I would really like to get my RAM up higher.
I know I need to up my BCLK Freq but what would the next freq be to try?
Can I up it my 1 like 181?
 
Ok here is where im at now after running Prime95 for 6 hrs stable.

Antec 900, ASUS P6T DELUXE, SLI x2 EVGA GTX280, KINGWIN Mach 1 ABT-1000MA1S Modular,CORE I7 920 OCed (2.66 -> 3.7 GHz),Corsair TR3X6G1600C8D,WD Caviar Black 640GB, CoolerMaster V8

3.7 GHz

CPU Ratio Setting: 20.0
BCLK Freq: 186
PCIE Freq: 100
DRAM Freq: DDR3-1491 MHZ (9, 9, 9, 24 2T)
UCLK Freq: Auto
QPI Link Data Rate: Auto

Dram Timming Control Auto

CPU Voltage: 1.35
CPU PLL Voltage: 1.96
QPI/DRAM Core Voltage: 1.35
DRAM Bus Voltage: 1.64
CPU Differential Amplitude: 800mV

Full load Temps: 79 78 77 74
Ideal:35 35 39 33

What should I tune on this setup?
I'd really like to get the RAM closer to 1600 MHz (8, 8, 8, 24 T) Do you think I should try for this or will I not see a difference in gaming?
 
You won't see a notable difference on gaming by overclocking the RAM. I'd personally would try lowering your voltage as far as you can while remaining Prime95 stable. Your voltage does seem high for that overclock.
 
Which voltage are you thinking of?
What would you change them too?

CPU Voltage: 1.35
CPU PLL Voltage: 1.96
QPI/DRAM Core Voltage: 1.35
DRAM Bus Voltage: 1.64
CPU Differential Amplitude: 800mV
 
If you have a C stepping processor they can take a ton of voltage to get a good OC. A good way to see how much it will take at a certain speed is to leave the voltage on auto, and see where the computer sets it....then try to lower it from there until you hit instability.
I would say if you can go hours on prime95 while doing other stuff in the background you are stable. Keep in mind that is running your cpu at 100% for the entire time. There is really nothing you do in everyday use that will push your computer that hard.
 
I'm confussed.....

At the setting i have above, I am stable.
Why should I drop the voltage?
What will this do for me?

And what voltage are you talking about I listed four of them above.
 
Lower the cpu core voltage to as low as possible for stability and lower PLL if you can. You said you want to increase your memory speed, what's the ratio for it right now. Give more details man. what stepping is your cpu you even know what that is? do you have turbo mode on? you lack of info .

Quote:
"Why should I drop the voltage? What do you think, use your brain man, lower temperatures, save money on electric bill, cpu last longer.

What will this do for me? Answered above.
 


You should drop the voltage as low as you can while still remaining stable. It will lower temperatures, lower power consumption, and prolong CPU life. Don't lower them to the point where it starts failing Prime though.
 
Overshocks and others, thanks for your reply.
This is my latest stable testing for last 12 hours....I tested this configuration over night.
CPU fan on max power

Do these voltage settings and temps look OK for long life and gaming?

I will be OCing my SLI GPU's next weekend.

3.7 GHz

Ai Over Clock Tuner: Manual (I have not tried XMP)
CPU Ratio Setting: 20.0
BCLK Freq: 186
PCIE Freq: 100
DRAM Freq: DDR3-1491 MHZ (9, 9, 9, 24 2T)
UCLK Freq: Auto
QPI Link Data Rate: Auto

Dram Timming Control (Auto for all)

CPU Voltage: 1.30
CPU PLL Voltage: 1.86
QPI/DRAM Core Voltage: 1.35
DRAM Bus Voltage: 1.64
CPU Spread Spectrum: Disabled

Turbo: Disabled
SpeedStep:Enabled

Full load Temps: 70 70 71 67
Ideal:34 33 37 33

Antec 900, ASUS P6T DELUXE, SLI x2 EVGA GTX280, KINGWIN Mach 1 ABT-1000MA1S Modular,CORE I7 920 OCed (2.66 -> 3.7 GHz),Corsair TR3X6G1600C8D,WD Caviar Black 640GB, CoolerMaster V8
 
belial2k and cjl

Thanks for your help
I have learned a lot today.

Now on to GPU overclocking.
I already have a lot of material to read on this subject.



overshocks,

lol.....
Did you take a deep breath?
You ok now?
 
Haha Mark_K I'm alright, thanks for asking.

Your RAM can be a little better, try 8-8-8-24 timings , 1.65 DRAM voltage, if that doesn't work then it's just too bad.

Decent overclock man, too bad the V8 doesn't do too good of a job for the temperatures at 3.7GHZ. Is your fan on max? 1 or 2 fans? After all this is a "looks" cooler not so much of a performer I would say.

Just a heads up for GPU overclocking, don't expect too much coming outta GPUs, they can only overclock a little bit. Try to keep the core/memory/shader balanced. Up the core first, then memory, then shader. Try to get highest core first, then move on. Your 2 x GTX 280 should not go over 90C for 24/7.
 
overshocks,

Thanks for your help.

I updated my 24 hour results in the post above.
The temps I put in where wrong they where from a different test with higher voltages.

I reverted my CPY Dif Amp back to Auto.
and now the correct temps are listed after 12 hours of testing with the config listed above.

I am going to create a new listing with my new OC configuration for others to see that have the same componets as me.

thanks all!
 
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