100% GPU OC Does Nothing

[voltoid27]

Hi all,

I have a cheapo gaming rig with an A4-6300 APU and Radeon HD 8370D graphics. I thought it'd be a fun little experiment to overclock the IGP in the BIOS (UEFI, technically) to squeeze a few more FPS out of some open source and indie games. The chip was stable at 800, 900, and 1000 MHz, so I thought I'd do something crazy and double the clock speed; from 760 MHz to 1.52 GHz. And...it was stable. By this time I was getting suspicious and ran 3DMark 11 and Xonotic's included benchmark to see if anything was happening, and sure enough, the scores were, for all intents and purposes, identical to my previous non-OC'd tests. GPU-Z reports the clock speed at 1.52 GHz, yet in the Sensors tab it shows the clock as 0 MHz.

Does anyone have any insight as to why my would-be crazy OC is doing absolutely nothing?

 

[Darkbreeze]

I can't say for sure, but it's likely that it has to do with the voltage. You've increased the multiplier, but not the voltage. You probably need to OC the CPU portion of the APU in addition to the GPU portion, and bump up the voltage in order to see any benefit from the multiplier. It's probably just ignoring the multiplier setting OR there is another setting that needs to be enabled for the clock to be actually used at your setting. Dunno for sure, but it seems weird. I'd say to reset the BIOS to stock settings and overclock the GPU using Overdrive or another compatible utility.

The best graphics performance improvements on the APU's are gained by memory performance increases though. More and faster RAM directly relates to a faster and more powerful graphics experience with these AMD iGPU's.

This video might give you some insight into what you need to do to get the graphics bumped up a bit:

https://www.youtube.com/watch?v=_HArK0oeTW8