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AMD A2 X4 640 10% overclock

post #1 of 2
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Hi all this is my first post so bear with me. The rig in my signature is my first build and i'm trying to overclock it. I can't get it stable above 3.2Ghz or so (3.0Ghz is stock) without adding voltage. I got it to 3.3Ghz and it was close to being stable at about 1.41V. This seems like alot of voltage to me or am I wrong? Also after overclocking to 3.2Ghz Crysis won't load up and it seems like it is running SLOWER than stock. Temps are under 52C for the processor and the mobo gets up to about 58-59C (is that too high?). I'm looking into an aftermarket cooler as we speak and will most likely have one in about a week or two. Any suggestions on how to get this stable at 3.3Ghz? Thanks ~ Jason
PowerHaus
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Athlon II X4 640 ASUS M4A785-M XFX Radeon 5770 Corsair XMS2 2GB 
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PowerHaus
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Athlon II X4 640 ASUS M4A785-M XFX Radeon 5770 Corsair XMS2 2GB 
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XP 32-bit XFX 650W XXX edition NZXT M59 NZXT Avatar 
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post #2 of 2
Welcome to the forum

1.41V seems like a lot for nowadays processors, but it really isn't that much for a Phenom II/Athlon II, they were designed to work at high(er) voltage. Since you're under 52°C with a stock cooler it means the voltage isn't too high.

You should upgrade the cooler to something like a CM Hyper 212+ (cheapish and effective) to have more temp-headroom. Then you could up the voltage to 1.45V and see how it goes.

P.S. There is a difference between the BIOS voltage, the one you dial in, and the voltage of the processor under load. The latter is usually lower - but that is the one that matters for stability during OCing. Depending on the motherboard you may dial 1.41V in the BIOS and have no more than 1.35V under load conditions - this limits OCing badly. Check what is the real processor voltage under load using for example the OCCT CPU test - this software will allow to monitor temps, voltages, fans speeds, etc while running the burn test.
Centurion
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Centurion
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Phenom II 940 @3.3GHz 1.25V Gigabyte 790X-DS4 XFX 5850 8GB OCZ DDR2-800 
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Corsair Force 3 TRUE Win 7 Pro x64 ACER 23" TN  
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400W Silverstone Strider Antec P182 
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