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How do I speed up A10-7890K GPU performance

post #1 of 12
Thread Starter 
I am trying to get better GPU performance out of my A10-7890K APU. How do I overclock the GPU side? Is there a program like EasyTune that works on the graphics side of the APU?

Also I have Corsair Vengance 2400mhz DDR3 memory sticks, 4x8gb, total 32gb RAM. I get consistently low speed and the clocking seems to be set at 1333 and is running around 666-833mhz. I wouid at least like to get 2133 out of it, if not 2400mhz. Is there a program for clocking memory speed too?

Win 10 Pro
Gigabyte F2A88XM-D3HP A88X
AMD A10-7890K


Thanks!

Tom
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post #2 of 12
The iGPU performance correlates directly with your memory speed. Even at the maximum theoretical memory speed (2400MHz) the iGPU is fully limited by the available memory bandwidth. On Steamroller APUs four memory modules are officially supported up to 1866MHz. If you want to maximize the iGPU performance, then most likely you need to get rid of two modules and run the remaining two at the maximum frequency of 2400MHz. You might be able to reach higher than 1866MHz while still using more than two modules, however that is not guaranteed. Steamroller APUs officially support up to 2133MHz max., regardless of the memory configuration. 2400MHz option is always unofficial.
post #3 of 12
Thread Starter 
Thank you The Stilt.

Another question, the APU claims that it supports up to 2GB of RAM but it only shows 1GB. Is that 2GB a dynamic process or can I allocate RAM for GPU only? And how would I do that?
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post #4 of 12
The amount of memory reserved for the GPU (frame buffer) is adjustable in the bios. It should be adjustable between 64 - 2048MB.
post #5 of 12
for what it's worth, you can overclock the igpu in the program AMD overdrive. You can't change the voltage of the NB in overdrive though. Have to change that in BIOS.
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post #6 of 12
Quote:
Originally Posted by The Stilt View Post

The amount of memory reserved for the GPU (frame buffer) is adjustable in the bios. It should be adjustable between 64 - 2048MB.

I never truly understood why this would be an important parameter. If video memory is not enough during the execution of a game, wouldn't the OS allocate it automatically from system memory? (which, in the particular case of APUs, is still the same memory)?
post #7 of 12
Quote:
Originally Posted by Feimitsu View Post

I never truly understood why this would be an important parameter. If video memory is not enough during the execution of a game, wouldn't the OS allocate it automatically from system memory? (which, in the particular case of APUs, is still the same memory)?

No.
The memory usage can never exceed the reserved quota, which is fixed and set before system init.
So if you set the FB size to 256MB the GPU cannot use more than that, no matter how much free memory the system has.
post #8 of 12
Quote:
If video memory is not enough during the execution of a game, wouldn't the OS allocate it automatically from system memory?

Nope. That is true for Intel IGP with DVMT enabled, but not for AMD integrated graphics.
post #9 of 12
Thanks for the answers guys.
post #10 of 12

I'm doing some tests of the A10-7890K at the moment, comparing its performance with the A10-7870K at Cpu3900/4500Mhz and Gpu866/1040MHz, and I'm finding on an Asus A88X-Pro that to run the iGpu at 1040Mhz I need to raise Load Line Calibration and other VRM controls to at least medium settings to get through some benchmarks, such as Compubench, Unigine Heaven, PcMark and FFXIV Heavensward which didn't need these higher settings with the A10-7870K.

 

Apart from that the Asus automatic settings of VDDNB for various iGpu base frequencies seem to work the same as on the A10-7870K: to 1.225V for anything below 975MHz; to 1.25V for 975MHz(Turbo); to 1.3375V for 1040MHz(Extreme); and to 1.3875MHz for 1114MHz and above.

 

I don't know how the Gigabyte A88x boards behave when you overclock the A10-7890K in the BIOS, but unless you add an offset of your own to CPU Voltage the Asus board sets it very high according to the Cpu Frequency: 1.5V(up to 4200MHz); 1.55V(4300-4400MHz); 1.6V(4500MHz); 1.65V(4600MHz).

 

It's worth checking to see if your motherboard is behaving like this by checking the voltages it is operating at after you boot into the operating system and before putting the system under load.

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