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Overclocking a Phenom II X6 1090T B.E to 4.2GHz

post #1 of 23
Thread Starter 
Hi, i want to overclock my processor to 4.2GHz. I have already overclocked it to 3.8GHz by increasing the multiplier in the BIOS. When i try 3.9GHz, it crashes straight after i start stressing it out with prime 95. 3.8GHz is stable and it only goes to idle at 18-19C and load is 40C. I am using a Coolermaster Hyper 212+ with 2 fans. My motherboard is a Gigabyte 990FXA-D3 and it has a 4+1 Phase Power with no VRM cooler/heatsink. I don't want to blow up my motherobard or anything else by doing this. When it stressed, the voltage is 1.440 but when it is not being stretched it is 1.504. I have not adjusted the voltage, just the multiplier. What do i need to adjust to make 4.2GHz stable apart from the change of the multiplier? I reckon the voltage itself is already enough because i've seen other people's overclock is higher then mine but lower voltage. If you need anymore specs, look at the system specs in the signature.

Edited by killerx525 - 8/8/11 at 3:54am
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post #2 of 23
Is it at stock voltage? If it is, bump it up a little bit and try 3.9Ghz.
post #3 of 23
Thread Starter 
Yes it is at stock voltage.
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post #4 of 23
If you need 1.45v for 3.8ghz, 4.2ghz is unattainable for you. 1.55v is the maximum voltage, and 4.2ghz would take you way over that. Every chip is different, when someone gets 4.2ghz on 1.45v it doesn't mean you can.
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post #5 of 23
It seems like you're suffering from a big vdroop since you go from 1.5v to 1.44v when it's stressed.
    
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post #6 of 23
The 990FXA UD3 is not a 4+1 Power phase design,it is a 8+2.It should handle anything you throw at it.You can go up to 1.56v-1.6v on the CPU on air cooling.
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post #7 of 23
Thread Starter 
Are you sure it is 8+2? On the motherboard box it says 4+1 phase power. Just to confirm the original voltage which is 1.46V. I bumped to 1.5V and increased it to 4.0GHz but it was unstable after starting prime95.
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post #8 of 23
Quote:
Originally Posted by Redwoodz View Post
The 990FXA UD3 is not a 4+1 Power phase design,it is a 8+2.It should handle anything you throw at it.You can go up to 1.56v-1.6v on the CPU on air cooling.
It's not a UD3, it's just a D3.

@OP I would add heatsinks to your VRMs first before going past 1.5v. Also try to get some airflow in that region.
    
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post #9 of 23
Thread Starter 
No idea where you can buy a VRM heatsink for my motherboard. So it's possible to overclock it to 4.2GHz without damaging my motherboard and processor?
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post #10 of 23
Quote:
Originally Posted by killerx525 View Post
No idea where you can buy a VRM heatsink for my motherboard. So it's possible to overclock it to 4.2GHz without damaging my motherboard and processor?
depends on the temperatures, just remember the max temperature of the thubans are around 62c.
it may me but 1.6v seems a little scary for 24/7 Redwoodz
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