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Computer keeps freezing/restarting if I don't underclock my CPU, need help

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September 20, 2013 1:53:00 PM

I recently built my own cheap computer from various components, the specs are as followed:

Intel Core 2 Duo E8400 3GHz
Nvidia Geforce GTX 460 1GB
4GB DDR2 6400/800
PSU: 650W ATX Lead Power
MOBO: ASUS P5B SE
Windows: 7 Home Premium

I originally had a 500W ATX PSU and could not run my CPU at 3GHz without a BSOD occurring at start up, I could only get to about 80% of its maximum power before a BSOD occurred, so I recently upgraded my PSU to 650W, thinking this would fix the problem, but nothing has changed. I'm really stumped as to why I cannot run my CPU at normal levels. Temperatures are fine and I have no issues with overheating, in case any of you were wondering. Thanks for your time!
a b à CPUs
September 20, 2013 3:46:10 PM

Is your CPU second hand?

Can you please download http://www.cpuid.com/softwares/hwmonitor.html to keep an eye on your temps.

Alternatively, feed your machine more power - CPU vCore, at 3GHZ, as a thirsty CPU is prone to overclocking, and the motherboard may not be automatically feeding it enough. Just increase this in the SMALLEST increments at a time.
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September 20, 2013 4:00:30 PM

teh_gerbil said:
Is your CPU second hand?

Can you please download http://www.cpuid.com/softwares/hwmonitor.html to keep an eye on your temps.

Alternatively, feed your machine more power - CPU vCore, at 3GHZ, as a thirsty CPU is prone to overclocking, and the motherboard may not be automatically feeding it enough. Just increase this in the SMALLEST increments at a time.


I already checked temps via HWMonitor. How do I feed my CPU more power?
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a b à CPUs
September 20, 2013 4:39:07 PM

Go into your BIOS and increase the CPU Vcore increment by 1
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September 20, 2013 5:26:37 PM

teh_gerbil said:
Go into your BIOS and increase the CPU Vcore increment by 1


I looked but could only find the overclock profile. What would this be under?
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a b à CPUs
September 20, 2013 5:41:36 PM

what's your motherboard model?
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September 20, 2013 5:46:16 PM

teh_gerbil said:
what's your motherboard model?


ASUS P5B SE
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Best solution

a b à CPUs
September 20, 2013 5:59:15 PM

Haha, under the FAQ:

http://www.asus.com/Motherboards/P5B/#support_Knowledge...

"As Intel specification clearly states Vcc (CPU Vcore) should drop in propotonal to the increase of Icc (CPU current consumption), in order to prevent causing permanent damage to your CPU. When CPU is under stress (in other words, under higher load), the current consumption of the CPU will go up, and the CPU Vcore will then drop to conpensate this change. This is a perfectly normal behaviour, and will not effect the overall stability of your system."

Add an unstable system to begin with, and a volt drop would cause BSOD issues like a boss.

And yes, that is the feature you're after.
http://dlcdnet.asus.com/pub/ASUS/mb/socket775/P5B/e2620...

According to this, using precision tweaker you can adjust Vcore at 6.25mV increments. Try 1 at a time, boot and see how stable she is.
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September 20, 2013 6:08:42 PM

teh_gerbil said:
Haha, under the FAQ:

http://www.asus.com/Motherboards/P5B/#support_Knowledge...

"As Intel specification clearly states Vcc (CPU Vcore) should drop in propotonal to the increase of Icc (CPU current consumption), in order to prevent causing permanent damage to your CPU. When CPU is under stress (in other words, under higher load), the current consumption of the CPU will go up, and the CPU Vcore will then drop to conpensate this change. This is a perfectly normal behaviour, and will not effect the overall stability of your system."

Add an unstable system to begin with, and a volt drop would cause BSOD issues like a boss.

And yes, that is the feature you're after.
http://dlcdnet.asus.com/pub/ASUS/mb/socket775/P5B/e2620...

According to this, using precision tweaker you can adjust Vcore at 6.25mV increments. Try 1 at a time, boot and see how stable she is.


I see, but one question: Is Precision Tweaker a program I need to download or should it be in my BIOS already? I haven't seen it in my BIOS, so far.
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