Athlon 760k max overclock seems 4.2GHz

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ExSangu

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Mar 31, 2014
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I was trying to overclock my AMD Athlon II X4 760k, and the maximum stable overclock I got was 4.2GHz with a core voltage of 1.4125. When I moved on to 4.3GHz with a voltage of 1.4187 my pc shuts itself down while testing with Prime95.

The thing is I've seen people overclock this thing to 4.5GHz or even higher. Am I doing something wrong?

System Specs:
AMD Athlon II X4 760K
CM Seidon 120V
ASRock FM2A75M-DGS
Crucial Ballistix Sport 8GB @1600MHz
Gigabyte GTX650ti Boost (Windforce/OC)
BeQuiet Systempower 400W Bronze
Crucial M4 64GB SSD
Toshiba 500GB HDD


 
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ExSangu

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Mar 31, 2014
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While Prime95 was doing it's thing the temp was 43 degrees Celsius max so I don't think that's the problem.

About the PSU, I made a mistake and it's a 400W one instead of a 300W.
 
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bicycle_repair_man

bicycle_repair_man

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Jan 10, 2014
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Seemingly identical processors overclock differently, so some will do it better than others. You also need to consider the cooling methods other people use and what their ambient temperature is. Overclocking isn't an exact science unfortunately.

I'd say that the reason your PC shuts down is due to voltage; there's probably a lack of it. Increasing the voltage won't damage the processor, but heat will. There's no harm in increasing the voltage if you have a good aftermarket cooler to keep the temperature low.

43C seems suspiciously low for that processor unless Prime95 had only been running for a few seconds before the PC crashed. I'd expect something around the 70C mark. What cooler are you using?
 
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ExSangu

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Mar 31, 2014
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4.3GHz with 1.4250V crashed, but 1.4312V seems to run fine. The only thing is that it core 0 and 1 are running at 1.8GHz but 2 and 3 at 4.3GHz and I have no idea why.
 
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bicycle_repair_man

bicycle_repair_man

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Either a specific clock speed has been specified for those cores, or the processor isn't receiving enough voltage to operate all the cores at full power. It's unlikely to be due to a specific clock speed, but it's worth a check in the BIOS anyway.

If you set the VCORE to auto, do all the cores run at full speed?
 
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ExSangu

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Mar 31, 2014
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I cannot set just VCORE to auto, just both the multiplier and the voltage. But they run fine if both the multiplier and voltage are on auto.

Increasing the voltage manually didn't work either. Multiplier was at 43x and the voltage at 1.4750 and the first 2 cores were still running at 1800MHz where the other two were at 4300MHz.

 
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bicycle_repair_man

bicycle_repair_man

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Jan 10, 2014
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If all the cores run at full speed with automatic voltage, I'd normally say that there isn't enough manual voltage, but 1.47V should be plenty. Increasing the voltage won't damage the processor, but the extra heat will. As long as you keep the temperature under control, you can push the voltage higher.
 
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ExSangu

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Mar 31, 2014
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seems the problem with the different core clocks is resolved, changing the multiplier and voltage in AMD Overdrive seems to have caused the problem. I changed them in the bios itself and it seems to work.
I'm testing an overclock with a clock speed of 4.4GHz and 1.875V now and I have not had any crashes yet.
 
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Jbatacan2

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Aug 22, 2014
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The mobo is usually at fault here. Im guessing the ASrock has a 4 pin input to the mobo? If so, theres a high chance the voltage is suffering and isnt a true 1.48v. My first mobo could only touch on 4.2/4.3 before it would start clocking down the cores one by one. Im currently sitting on 4.8ghz on air on my new mobo @ 1.525v x45 multi 107 bclock, which supplies an 8 pin mobo input instead. Runs like a top on steroids now.
 
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Jbatacan2

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Aug 22, 2014
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Yeah, the power phases are a pretty big deal because the athlon chips like to leak, and need tons of voltage. My MSI A88X full size has a 8-2 phase and uses a 8 pin on the board. and its ROCK SOLID. For only a 100 bucks you also get a KILLER lan setup and some damn good audio performance in the creative sound on the board. Hope that helps with your OC stuff, you can definitely hit 4.8 on air as i have easily with the right cooling in the case and CPU.

http://www.newegg.com/Product/Product.aspx?Item=N82E16813130754&cm_re=a88x-_-13-130-754-_-Product
 
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Neil Dangat

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Jun 9, 2014
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if you wanted to push your chip farther, you could, i will be obtaining a 760k soon, and ALL the owners clubs ive read say that the max vcore a chip can be pushed to is 1.55 (yes for haswell its 1.30 but theses are amd), so if you wanted to, set the v core to 1.55 and then psuh the clokcs up as high as you can stably go, as 4.5 ghz is usuall on air, and 4.8 on water
 
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ExSangu

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Mar 31, 2014
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Thanks for all your replies, but I already decided to stick with my stable 4.2GHz overclock as going any higher is a bit too risky while the peformance increase isn't really that great. :)
 
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FlazeHD

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Sep 21, 2014
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Low on watts my friend upgrade you pay does not matter which one you get Iv built 6 pc on cheap psi still no problem one exploded but I was messing with it but it did not cause any damage to the components because they have an safety feature so if it happens it's shuts down when it explodes not allowing any power to pass trough the plug
 
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