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Amd athlon II x4 2,8GHz

post #1 of 32
Thread Starter 
I have Amd athlon II x4 2,8GHz with gigabyte GA-A55-DS3P motherboard and Transcend 4GB 1333MHz DDR3.....
if anyone can tell me how to overclock the cpu.... I'd be grateful... :smile.gif
post #2 of 32
I'm guessing you have an Athlon II X4 641? If that is the case it is not an unlocked processor. It's an FM1 processor. FM2/FM2+ pretty much can't OC with FSB so my guess is you can't do that on FM1 either leaving you with no way to overclock.
Edited by xKrNMBoYx - 1/24/15 at 10:36am
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post #3 of 32
Thread Starter 
Yes it's Athlon II X4 641... And he have unlocked multiplier.... I tried something and I'm not sure if it 's good...

post #4 of 32
Well from the picture you provided your CPU doesn't seem to have unlocked multipliers. You can obviously move the CPU multiplier below 28 but if you can't raise it above 28 then you have a CPU with a 'locked' multiplier. Again looking at your screenshot of CPU-Z it seems you raised the FSB to OC the CPU. Normally FSB is 100 so 100 x 28 = 2.8GHz but as FSB is set to 114.99 the CPU speed is 3.2GHz. You won't be able to overclock just the CPU speed with a CPU multiplier but you will with the FSB/BLCK. But with FSB overclocking you have to check on your RAM, NB, HT, and PCI-E clocks as FSB messes with all of them.

It's good that you were able to OC the CPU but now you must see if it is stable. First you better have a good cooler because it's not really recommended to OC with the stock cooler that comes with CPUs. Second you need applications like Prime95, OCCT, IBT, AIDA to test if your CPU overclock settings is stable. You will also need software to manage your temperature while stressing the CPU.
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post #5 of 32
Thread Starter 
I am already used prime95 and aida 64... Temperature of my cpu is 65 C for about half hour with stock cooler ... max is 69 C... My max multiplier is 47...
Can u explain to me what i need to do with CPU NB Clock Divisor? I am lived him on auto...


post #6 of 32
Quote:
Originally Posted by Donatus View Post

I am already used prime95 and aida 64... Temperature of my cpu is 65 C for about half hour with stock cooler ... max is 69 C... My max multiplier is 47...
Can u explain to me what i need to do with CPU NB Clock Divisor? I am lived him on auto...



Thanks for the picture, now I know the CPU has unlocked multipliers. First thing you want to do is change CPU Frequency shown in the BIOS back to 100. Keep everything on auto and for now only change the CPU clock ratio to overclock. Turn System Voltage Control to manual and then leave everything at normal. From there raise your CPU clock ratio by one so x29 and then test the computer with prime95 for about 10-39 minutes. If it passes raise the CPU clock ratio again and test for stability again. Do this until your OC is no longer stable with stock voltages. From here you can decide if you want to stay at the highest OC while using stock voltages or if you want to raise voltage a little more as long as temps allow. The Max Operating/Recommended Temperature for your CPU is 70C so you are already near the limit with your stock cooler.

If 3.2GHz was stable for you can get to 3.2GHz with 100 CPU Frequency and 32 CPU Clock Ratio
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post #7 of 32
Thread Starter 
Is not it important to raise the FSB as much?
post #8 of 32
Quote:
Originally Posted by Donatus View Post

Is not it important to raise the FSB as much?

In general there is usually no need to raise the FSB (OC by FSB). FSB use to be the norm back a few years ago but it isn't as much anymore. Some people say you can OC with less volts with FSB but that isn't really the case always. Currently you can't really OC with the FSB on Intel CPUs and the same with AMD APU/CPUs based on the FM2 socket. You have an FM1 socket processor that I have never used before so I can't say if OCing with the FSB is a viable choice. FSB OCing was mandatory with CPUs with locked multipliers but you have an unlocked multiplier CPU so you shouldn't have to worry about FSB. Messing with FSB means you have to worry about your memory, pcie, north bridge, and hypertransport frequencies. Each category has it's own multipliers.

So for example you have 1333MHz RAM. So it has an multiplier of 13.33. 13.33 x 100 FSB = 1333MHz of RAM. PCI-E clock speed is suppose to be 100MHz so that means it has an multiplier of 1 (1 x 100 FSB = 100 PCI-E). So if you raise the FSB then it will alter the speed of the other components. So for example your picture shows FSB at 115? 115 x 13.33 = 1532MHz. That means your RAM is running at speeds faster than what it officially supports. Problems may not occur at very low FSB increases but the bigger the FSB gets and you don't alter the multiplier of stuff like memory your RAM will be OCed.

So if you want to continue OCing with FSB (no need for you as you have unlocked multipliers to make it easy) this is how you even out things with an FSB increase. With the 115 FSB you would need to set the RAM at a multiplier that would run the memory at the rated speed, little below or very little more. 1333 divided by 115 FSB = 11. RAM only have set multipliers, they are 8, 10.66, 13.33, 16, 18.66, 21.33, 24, etc. The multiplier you would want to use would be 10.66 as 115 x 10.66 = 1187MHz vs 115 x 13.33 = 1532MHz. You would have to do same calculations with NB frequency, Hyper Transport if FM1 socket has that, etc.

I'm recommending you not mess with FSB unless you are sure you know what you're doing as it may get messy for both the OCer and the people trying to help.

If you want to mess with FSB I suggest you first find your stable OC that you like while staying at and under the max temps. Then you can OC with the FSB to similar speeds.
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post #9 of 32
Thread Starter 
Look at better my memory clock speed and her multiplier... Memory is not my prob.... My prob is just CPU NB clock divisor... my first choice is 2... when i put NB clock on 2 clock is 2000Mhz... default is 666Mhz... is that to mutch?
post #10 of 32
Quote:
Originally Posted by Donatus View Post

Look at better my memory clock speed and her multiplier... Memory is not my prob.... My prob is just CPU NB clock divisor... my first choice is 2... when i put NB clock on 2 clock is 2000Mhz... default is 666Mhz... is that to mutch?

There is nothing to look at. This is why I said you shouldn't mess with the FSB. There is too much you have to worry about and only people with experience with your particular socket, motherboard, CPU can help you. When you mess with FSB Memory, North Bridge, PCI-E, Hyper Transport is all the problem. Does 2000MHz comapred to 666MHz a lot? Yes that's more than a thousand megahertz. Every motherboard names the BIOS settings different and yours is different then any of the motherboards I have own. Stick with just using CPU clock multiplier, read the motherboard manual/find guides online, or wait for someone who has experience with your motherboard or a similar one.

Figure out what the default NB Speed is for your CPU and then do the simple math to make things work. NB Frequency can run faster than what is normal/stock but in order to that you will need to add more voltage to the CPU NB which will make your CPU hotter.
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