AMD Phenom II X4 965 BE C3 - Need an idea for overclocking

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fe77az

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Aug 18, 2015
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First off all im newbie about overclocking and learning watching videos or reading forums but now im stucked.i try to reach 4ghz but some how everytime when i set bus speed or clock multply for 4ghz and strees test on (amd overdrive or prime95) windows 8.1 gave me blue screen and reboot the system. I have two slots ram 1600 cl9 and i set it 1333 before overclocking and no extra voltage on rams. i tried to increase cpu voltage to 1.472 (from 1.375 default) but still no happy ending for me. My last stable overclock is
NWNkGk.png


Temperatures CPU VCORE : 1.424V 3960Mhz -- CPU Temp: 53-55*C Core Temp:58*C

AMD Phenom II X4 965 BE c3 default voltage 1.375
Cooler Master Silent Pro 700W
GA-790XTA-UD4
"KHX1600C9D3/4GX" 1600mhz (4gb x 2) 9-9-9-24-33-2T
Cooler Master Hyper TX3 Evo

is it ending step for my overclocking or should i try something different (more voltage? im a bit afraid) to reach 4 ghz or more?
 
Solution
killer pc g15
you can calculate your tdp like this:
power / stock volt = stock current
125 / 1.375 = 91A
stock volt / current = resistance
1.375 / 91 = 15.1mOhm
new voltage / resistance = new current
new current * new voltage = new wattage
so with 1.45 your at 140watt
and 1.5 at 150watt
and thats just voltage increase. If you like to add a frequency increase you should multiply the stock resistance and frequency and then devide it by the new frequency
so 4ghz 1.45volt is: 1.45(1.45 / ( (15.1mOhm / 3400)*4000)) = 164Watt
and dont worry your motherboard can handle it just fine.
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ComputerSecurityGuy

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Mar 30, 2015
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Well, if you can't push it just clock speed anymore overvolt it and then push clock speed. I would be hesitant to push past 4gHz but it's quite possible. I'd just worry if the TDP starts to exceed about 125W as the motherboard wasn't designed to handle much more than that.
 
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CountMike

CountMike

Titan
Oct 31, 2015
33,759
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147,990
It's C3, you won't get far above 4 GHz without at least 1.5v if at all. Even C0 needs 1.525v for 4.2 GHz. Count at at lest 140W TDP at those settings.
I had that on the same MB couple of years ago but it was C0 stepping (that's best of that series). Methinks you already have a good OC and eventual 100MHz increase you are not going to notice but may run into stability problems.
To run that RAM at 1600Mhz, it needs 1.65v (so says Kingston) what's more it will run at Cl11 than so once again very, very minimal gain.
Another thing that may be in your way is having all RAM slots filled up and that can overload processor's memory controller that is factory set to 1333 MHz. For OC it's better to have 1 or 2 x 4GB. Much less processor heat with only one memory channel used.
Those are my experiences with almost same combination of components.
P.S. Turn off all power saving on MB.
 
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killer pc g15

killer pc g15

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Apr 29, 2010
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you can calculate your tdp like this:
power / stock volt = stock current
125 / 1.375 = 91A
stock volt / current = resistance
1.375 / 91 = 15.1mOhm
new voltage / resistance = new current
new current * new voltage = new wattage
so with 1.45 your at 140watt
and 1.5 at 150watt
and thats just voltage increase. If you like to add a frequency increase you should multiply the stock resistance and frequency and then devide it by the new frequency
so 4ghz 1.45volt is: 1.45(1.45 / ( (15.1mOhm / 3400)*4000)) = 164Watt
and dont worry your motherboard can handle it just fine.
 
Upvote 1 Downvote
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