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Need help overclocking Pentium D 915

post #1 of 15
Thread Starter 
Hi everyone, I don't usually over clock things so I am a little new to this I am having some trouble trying to do this with my Pentium D 915 2.8ghz x2 I enabled cpu over clock in bios and the multiplyer is locked at 14 so I can't change that. The stock frequency is 200mhz so I set it to 233mhz which would be around 3.2ghz I saved and exited it boots up as 3.2ghz then it restarts itself and disables cpu over clock. I have 2gb of RAM 4x 512mb kingston and corsair. I'm not sure why it's doing this but here are some cpu-z screenshots:





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post #2 of 15
what voltages are setting with the 233MHz? What sort of cooling are you using, my old pc is a pentium D and they run majorly hot!
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post #3 of 15
your clock is probably to high for the amount of voltage.
    
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post #4 of 15
Thread Starter 
I didn't play with the cpu voltage didn't think I needed to for a small increase. Should I increase or descrease voltage as the clock goes higher?
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post #5 of 15
Increase the CPU voltage as you increase the fsb. i got to 3.2GHz with stock cooling from my pentium D 820 so you should be aiming for that at least depending on motherboard, ram and possibly power supply.
What's your system spec? i've set this thread to instantly notify me when you respond btw.
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post #6 of 15
You should start with a milder clock like 2.9
Be sure to monitor temps
Increase voltage with your overclock,but not until you find out how high you can go without increasing your voltage.Check for stability with each bump.
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post #7 of 15
Thread Starter 
Pentium D 915
Gigabyte ga-8i945pl-g motherboard
2gb pc-4300 ram
ZALMAN 9500A-LED Heatsink
Antec 300 case but I only have a rear and side fan but the rear seems to be helping the cpu a lot.
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post #8 of 15
The non-stock heatsink should help and that's a decent case. 4GB ram would give you a reasonable speed boost in games etc. try for 220MHz and up the cpu voltage a BIT, not too much. Then run a stability test for about 30 mins as an initial check.
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post #9 of 15
Thread Starter 
My motherboard wont see 4gb of ram so I don't bother. I first set fsb to 233mhz and uped teh voltage from the normal 1.3125 to 1.3500 incrementally that didn't work not sure how high I can go for cpu voltage. I then tried the same thing but with 215mhz fsb same effect just reboots and sets over clock to disabled. What program do I use for a stability test?

In the bios there is also a FSB over voltage control option too with +0.1 - +0.3 should I do anything with that?
Edited by Ninesvnsicks - 6/8/10 at 4:03pm
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post #10 of 15
Thread Starter 
I just tried 207mhz fsb which would be around 2.9ghz with normal cpu voltage and it's still just resetarting and disabling cpu over clock. I read somewhere about locking the pci-e bus mine has been set to auto this whole time so maybe I need to lock it but the question is what is the normal bus for the pci-e x16.

Edit: locked pci-e at 100 and still same results I don't get it no matter what I try it just keeps booting saying the frequency I want then rebooting and going back to disabled.
Edited by Ninesvnsicks - 6/8/10 at 5:01pm
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CPUMotherboardGraphicsRAM
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Hard DriveOptical DriveOSMonitor
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