View Full Version : Confused about GPU Clock, Boost Clock & GPU Tweak II

09-07-2015, 07:05 PM
Have never bothered much with GPU Tweak before with my old GPU but recently replaced it with a new and decided to play around some and learn how to OC it.

Followed JJ's youtube clip on how to overclock 980 and 970 ( https://www.youtube.com/watch?v=fyk5DCladcY ) and he suggested to run Unigine Heaven for about 30 minutes while logging the values with GPU Tweak so you have a baseline of your GPU.

In GPU Tweak II i had the Gaming Mode profile selected and according to the values in "Professional Mode" the GPU Boost Clock should be up to 1203MHz. But when i run Unigine Heaven i see in the GPU Tweaks log window that GPU Clock goes all the way up to 1329 almost straight away. After a while GPU Clock goes down 1316 but can go up to 1329 now and then.

If GPU Boost Clock is set to 1203 shouldn't that be the max then, or at least somewhere around there? Is it GPU Tweak that is just very buggy or is it me that doesn't really understand how it all works yet with base clock and boost clock?

And also, in Unigine Heaven it says in the upper right corner "Graphics: 1507 MHz".

Have a screenshot here: https://dl.dropboxusercontent.com/s/mpfbwbkypr1zq0i/GPUTweakII.png?dl=0
(if GPU Tweak looks extra big its because i have the computer connected to a TV and have enlarged font-size in windows to make text a bit more visible)

09-07-2015, 07:24 PM
That is the Nvidia boost clock kicking in, no worries, on top of your OC factory or applied by you, Nvidia will try to push further depending on thermals

09-08-2015, 12:08 PM
Okay, so when you read reviews on graphic cards and they list overclock settings and write something like "Boost Clock: 1493~1518 MHz" is that the values they get with the Nvidia boost clock kicking in?

For example:
"Boost Clock: 1493~1518 MHz" -> http://www.guru3d.com/articles_pages/asus_geforce_gtx_980_ti_poseidon_review,34.html
"Boost Clock: 1452~1477MHz" -> http://www.guru3d.com/articles-pages/nvidia-geforce-gtx-980-ti-review,36.html