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help with overclocking a AMD athlon II X4 645

post #1 of 9
Thread Starter 
hello I'm new to overclocking and i was just wondering if a can overclocking my CPU and if so what is a safe limit to overclock to and how would i overclock it. also could i use Gigabyte's easy tune 6 to overclock it or is that a bad idea with it being a software based overclock.
thanks

my current rig
CPU: AMD Athlon II X4 645 3.1 GHz
MOBO: Gigabyte GA-890GPA-UD3H
RAM: 4GB DDR3
VIDEO CARD: ATI HIS HD 5770 1GB
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post #2 of 9
Overclocking in Windows with any software is a bad idea unless you are just messing around. Use the BIOS.
There's no safe speed, only safe temps and voltages. You can get it as fast as the chip will allow under 55C and under 1.55 vcore. (You can go higher, but it's not recommended by AMD's specifications.)
Here is a great thread to teach you how to overclock on the AM2+/3 platform.
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post #3 of 9
Quote:
Originally Posted by billy66bare;15482318 
Overclocking in Windows with any software is a bad idea unless you are just messing around. Use the BIOS.
There's no safe speed, only safe temps and voltages. You can get it as fast as the chip will allow under 55C and under 1.55 vcore. (You can go higher, but it's not recommended by AMD's specifications.)
Here is a great thread to teach you how to overclock on the AM2+/3 platform.

billy's pretty much got it here^
post #4 of 9
Thread Starter 
thanks i will give that a go and tell you how much more speed i get
do i need to change the speed of my ram
Edited by abyssthatsfull - 10/27/11 at 10:23pm
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post #5 of 9
Thread Starter 
i justed finished my overclocking and i managed to increase my cpu from 3.1GHz to 3.41GHz safely with only changing the voltages and frequency of the cpu.
i got it to boot at 3.6GHz but when i tyred a benchmark/stress test it failed and blue screened. I think that happened because i did not change the ram frequency or voltages.
if any knows if the ram was the problem or if i need to change anything else could you please post it.


thanks
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post #6 of 9
What speed is your ht link and ram running at? Keep ht at 2000 and your ram speeds close to their rated settings.

Also bump your nb volts.
Sent from my phone...
Edited by LuckySe7ens - 10/28/11 at 3:59pm
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post #7 of 9
Keep your RAM and HT close to stock. Most people will lower the RAM speed and HT speed when overclocking the FSB to try and keep them out of the equation for stability. You may want to lower your NB speed a notch as well, or bump the "NB-CPU" voltage. I always run a full pass (all 8 tests) of Memtest86+ when changing memory timings. It seems that memory would run stable below it's rated specs, but that isn't always the case. It's much better to wait 30 or 40 minutes for the tests to run, than to spend hours thinking you have a crap chip due to unstable RAM.
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post #8 of 9
Thread Starter 
sorry that it took me so long to respond to this, but i just tried getting my CPU up to 3.6GHz while lowering the RAM and HT speed as close to the stock as possible (only 70 MHz difference). this time i managed to get to boot but it did not stay booted for long.
i don't know what to do now any help would appreciated
thanks
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post #9 of 9
Ok a good overclock for you would be as follows(I have basically same chip just mine is classed a phenom2)

Cpu/nb freq=230
Cpu Multiplier=16
That will give u 3.6ghz
Put ur cpu vcore voltage to 1.3875 (roughly)
Put nb voltage to 1.1875(maybe one level less but not higher)
Keep ur ram as close to stock sppeds as possible (1333 or what have u)
NB freq to x10 for 2300mhz or x9 for stock 2070mhz
Htt to as close to 2000 as u can.
If u can change ram timings make sure they are correct for the frequency that u have. (9-9-9-25-34 example for 1333mhz or 8-8-8-22-30 these are estimates)
Turn off cool n quiet and also disable load line calibration unless u are having voltage drops under load in prime 95 in that case make llc 50% or so.

Download cpuz to monitor voltage and view memory frequency and the spd table for ur ram. Download open hardware monitor to view temps of cpu and system.

If u can boot into windows than shortly after get a blue screen it more than likely a ram issue or not enuff volts. U are doing this at ur own risk and I am not responsible for anything bad that could possibly happen. I'm merely lending a hand and not trying to steer u in the wrong direction. Do more research and don't let that cpu overheat! If I missed anything ocn peeps please feel free to add to this thanks!


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