Boost my A6-6400K 3,9GHz to 4,5GHz

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Runaque

Runaque

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Jan 6, 2016
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Hey guys! I'm kinda new into this custom building your own computer and I made the decision two weeks ago to build myself an "entry level" gaming PC based on a Mini-ITX case. I searched around on the internet what kind of components I would need and where I wanted to go with it. I started with the mobo and went on from here and bought and ordered all components together during this time and past Sunday it was time to build all of it together.
I've build myself a Mini-ITX with the next components.

- Cooler Master Elite 130
- Gigabyte F2A88XN-WIFI
- AMD A6-6400K 3,9GHz (4,GHz turbo) Black Edition
- EVGA Nvidia GeForce GTX750Ti 2Gb
- Kingston 8 Gb RAM DDR3 1600MHz
- Xilence PSU 630W Performance A serie power supply
- Samsung SH224BB DVD/RW
- Toshiba 640Gb 2,5" HDD

I still have a 250Gb Crucial MX200 on its way that needs to become the operating system drive, but for now I have Windows 7 running on the HDD so I can tweak things and explore and test certain settings. One of this is that I want to overclock my A6 processor. I found how you can raise the speed of it in the BIOS, but after saving and rebooting the computer asks to go to default settings and I'm back where I started.

I have found on internet that this processor could easily be pushed up to 5GHz, but if like to stay below 4,9GHz, most likely 4,5GHz to keep things in a safe range.

Anybody that could help me out a bit in this matter? Much thanks in advance.
 
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Vogner16
I have to stop you before you buy that build.

don't buy an APU with the intention of getting a dgpu from NVidia on day one.
if you want amd cpu, go with FM2+ mobo and the Athlon x4 845.
due to driver confusion its easier to go all amd, or none. everyone seems to want an APU and a NVidia gpu, but this setup is horrible.

if you want to buy new hardware go with a R7 370x with that Athlon.
if you want more power for money go used and get a 7970 for $130 on ebay. (or go all used on ebay)

To your original question on overclocking, all amd cpu's and APU's overclock, and CMT design overclocks quite well.
overclocking is usually done by increasing the bus speed and multiplier and core voltage to maintain stable increased performance...
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Vogner16

Vogner16

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Jan 27, 2014
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I have to stop you before you buy that build.

don't buy an APU with the intention of getting a dgpu from NVidia on day one.
if you want amd cpu, go with FM2+ mobo and the Athlon x4 845.
due to driver confusion its easier to go all amd, or none. everyone seems to want an APU and a NVidia gpu, but this setup is horrible.

if you want to buy new hardware go with a R7 370x with that Athlon.
if you want more power for money go used and get a 7970 for $130 on ebay. (or go all used on ebay)

To your original question on overclocking, all amd cpu's and APU's overclock, and CMT design overclocks quite well.
overclocking is usually done by increasing the bus speed and multiplier and core voltage to maintain stable increased performance.

first up the voltage by a notch or two. for example stock voltage will be around 1.25V, pop that up to 1.30V or 1.35V.

IF YOU ARE NOT AN EXPERT DO NOT GO ABOVE .1V !!!

then increase multiplier to frequency desired and see if computer boots.

bus speed =200 stock
multiplier = 7 to 19.5 stock
voltage = ~~ 1.25V stock (im not sure if that's exact I cant remember)

after changes

bus speed = 200
multiplier = 23 (remove variable multiplier option (turbo core))
voltage = stock + 0.1V

final clock will be 4.6 ghz due to 200mhz X 23 = 4.6ghz

run prime 95 to see how stable it is (aka threads will stop with errors if not stable) and keep lowering voltage until errors appear then go back to last stable voltage.

goal is to have lowest stable voltage for the clock speed you want to run at.

If you raise the bus speed it will also raise the northbridge and ram clocks and this can be problematic so don't change it unless multiplier does not let you get what you want exactly.

hope this helps!!

cheers!!
 
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Runaque

Runaque

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Jan 6, 2016
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Thanks Vogner16! That was very interesting and usefull information you provided. I already have build the computer at the time I made this topic and it was running very smooth at that time, most likely also because it had only Windows 7 and just a couple of benchmark programs installed on it.
But I went looking into the BIOS and increased the voltage from 1,45 to 1,55 and raised the CPU Clock Ratio from 39 to 45 to end up on 4,5GHz since the busspeed is 100MHz. It's running pretty smoothly at this point and I'm very thankfull of your help.
 
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Vogner16

Vogner16

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Jan 27, 2014
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no problem! remember to keep watching the temperature of that cpu, it can get hot when overclocked and possibly even thermal throttle and you will lose performance.
 
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Runaque

Runaque

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Jan 6, 2016
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After a week playing and testing with settings in the BIOS I end up much higher then I actually anticipated. I validated it through CPU-Z and the result is a whooping 5GHz at 1,536v.
 
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