AMD A8 6600k processor. Overclocking. Bottleneck GTX 750?

GalaXxXx · Feb 16, 2015

Hi,
I have a feeling that my CPU bottlenecks GPU.
My specifications are:
Motherboard: Gigabyte F2A88XM-D3H
CPU: AMD A8 6600k
GPU: Gigabyte GTX 750
RAM: 8 GB 1600Mhz
When I run more CPU intense games, like Heroes of the Storm, or Starcraft II, the GPU usage and power is very low (around 50% usage and 30% power). The CPU usage gets to 95%, and even in the Open Hardware Monitor it shows that the usage was MAX 100% on each CPU core.

Is this CPU really that weak for gtx 750? What can I do to reduce CPU usage and pump up GPU usage ? Maybe some cpu overclocking? I have SilentiumPC Fortis II for the CPU cooler.

Thanks for answering and help!

Regards

iLiftFood · Feb 16, 2015

You won't get a bottleneck with the 6600k and the GTX 750. To reduce CPU usage an overclock could help.

GalaXxXx · Feb 16, 2015

I think this is clear, that the CPU bottlenecks GPU in my case. CPU usage 96-100% and GPU usage 50%. Maybe I have to buy a new CPU :/...

iLiftFood · Feb 16, 2015

That shouldn't be happening. For your motherboard, the only upgrade worth-while is the 860k

GalaXxXx · Feb 16, 2015

Will the Silentium PC Fortis 2 coller be compatible with my motherboard? The cooler has 4 pin. My motherboard had 3 pin for CPU but 2x 4 pin for system fans. When I connect it to 4 pin system fan, will it work?

CptBarbossa · Feb 16, 2015

That cpu shouldnt bottleneck your GPU. The games you mentioned are CPU intensive and will always max out a CPU before GPU. For example, SC2 can run max GPU settings on a 8800gtx, which is a dinosaur of a GPU, but will max out even some modern intel CPU's.

Bottlenecks are always application dependent. Some games that use a lot of GPU may never use half of your CPU, and vice versa. That becomes even more complicated when you throw in higher pixel density. At 1080p my old phenom ii x6 1055t bottlenecked my dual HD 7970's, but at 1440p it was a fantastic match.

GalaXxXx · Feb 17, 2015

Thank you very much for the answer CptBarbossa.
What about the 4 pin CPU fan compability?

CptBarbossa · Feb 17, 2015

It should work just fine. Both are interchangeable. The only thing you wont get out if it is your fan wont ramp up and and down with thermals. You can still set the fan speed in the bios tho.

GalaXxXx · Feb 17, 2015

You mean it won't ramp up and down according to the temperature ? I will have to set the fan speed in bios and this fan speed will be same all the time ?

CptBarbossa · Feb 17, 2015

essentially yes

GalaXxXx · Feb 17, 2015

Well, this is actually really bad news :/.

What about connecting the 4 pin cpu fan to a 3 pin cpu socket, leaving the 4th one not connected? Will it work ?

CptBarbossa · Feb 17, 2015

yes it will.

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