Overclock Question

[oaksmokedbacon]

morning all

I've been messing about with my MSI card and found a nice performance OC on the card which even at out the box speeds is highly impressive (long time since I had a nice PC setup ).

what has confused me this morning is what Afterburner is telling me is the Core clock speed is when running Heaven benchmark and FarCry 4. **edit and when looking again in the Afterburner software**

Afterburner -

Core = 1467 Mhz (which I'm assuming is including the boost)
Mem = 3903 Mhz

In GPU-Z the speeds are being shown as:

OC - Core - 1293Mhz with the boost 1378Mhz (Mem is 1953Mhz)
Stock - Core 1114Mhz with the boost 1253Mhz (Mem is 1753Mhz)
Power at 110% (the maximum allowed) and voltage is stock.


I've no complaints with the OC increase, the system runs great, no crashes, artefacts and it powers through FC4 at around 90FPS with pretty much max settings. Max temps sit around 65-70 with a slightly adjusted fan setup

I am curious as said at the top the discrepancy between the reported core clock speeds under load. Any thoughts on this? And for those with the same card any tweaks or comments to what I've done?


thanks as always

** quick edit - I do have a couple of screen shots but Im having one of those moments where I can't work out how to get it in the post ***

 

[ICDP]

Overclocking an Nvidia GPU is not an exact science. Your OC settings are more suggestions than exact settings. As long as the GPU is within heat/power tolerances it will boost as high as it can.

 

[JamesM]

GPUz reports the wrong figures on the main screen. You should find that on the sensor GPUz tab they will match Afterburner.

Also voltage readout is not correct either so don't pay too much attention to that.

Whatever core clock is shown when gaming will include your boost speed. The card will boost depending on power limit and heat. Once it hits one of these limits you'll see it go up and down.

 

[ICDP]

I should add that you can change the boost tolerance by increasing the power limit in the the GPU settings (PrecisionX). You can also increase the heat threshold before the GPU starts throttling.