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Does the GTX 770 downclock when not fully stressed?

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Cant seem to really find an answer online. Im aware on desktop it will obviously but i meant in games.

Despite having bought the new GTX770 a few weeks back i havent played much due to the recent summer temps making it too warm to sit in gaming. But as its cooled down now ive played a bit. I have my MSI Gaiming GTX 770 overclocked to about 1267-1280mhz with boost (varies on game).

When i run a benchmark of Valley/Heaven the core remains constant. I tried metro 2033 & crysis 2 briefly & seems to stay at a constant 1280mhz.

However when i run Dishonored I notice the game seems capped at 130fps. I also noted that the gpu seems to drop to 1084mhz area during some scenes, usually when less is happening. When the scenes seem more stressed the fps remains at 130 but the core clock seems to increase sometimes just to around 1153mhz sometimes up to 1267-1280mhz area.

Tried Batman Arkham Asylum for last 30 mins & similar situation happened. Seems capped at 62 fps (quick search of internet now seems to indicate you can stop this but this isnt important right now) & again i notice the same behaviour. When the scenes get more intense i.e. bigger area, fighting etc the gpu core clock seems to up itself again upto 1280mhz. But when things calm down again the core clocks drop to 10**mhz

This doesnt really bother me, at least in these two games as seems like the fps is capped & im hitting the max so i wouldnt get anymore from gpu regardless. But is this normal?

Fair few hours in to replaying Serious Sam 3 & for the most past it seems to have been constantly at 1280mhz, never really noticed a drop. However yesterday during a very intense scene (part where you get the chain gun for the first time & go round the corner & gets quite mad) I noted the gpu slowed down even to 950mhz area i believe. The temps never went past 72C. Is this to do with the cpu struggling with the literally 100 or so enemies on this particular scene in one go causing the gpu to slow? Or a coding issue?

Havent really played anything else to test just my intial observation of trying few games over the last week.
 
What do you use to see the gpu load? i use GPUz but i cant seem to overlay it within the game so i cant see what's going within certain parts of the game.
 
What do you use to see the gpu load? i use GPUz but i cant seem to overlay it within the game so i cant see what's going within certain parts of the game.

MSI Afterburner/rivatuner. You can select to see OSD (on screen display) of such things like core clock, temps, gpu usuage etc.
 
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Yes, Kepler will downclock where you do not need to power to run the scene.

Some of my older titles run at 600Mhz core clock.

Kepler will also look at temperatures and, depending on how high they are getting, adjust core clock accordingly.

It's perfectly normal.
 
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