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Shouldn't lowering the resolution improve performance?

post #1 of 7
Thread Starter 
Hello there,

Yesterday i was trying out a few settings on Far Cry 3 to see if i could improve performance. With my pc (i5 4670k at 4.2ghz and a Radeon 280x) i normally get more than 60 fps but sometimes i get framerate dips to the 30s. I'm running everything 1080p on ultra without AA. I turned off vsync and lowered the resolution expecting to see an increase in framerate and also no framerate dips in the areas where i usually get them. I was surprised to see that the performance of the game barely changed, almost the same framerate dips. So my question is: why wasn't there a performance increase, if say, i lower the resolution to 900p? does this mean that it's not the videocard but the CPU?

I've also noticed this on Assassins Creed 3, although that game runs terrible. It doesn't matter what settings i choose, i get the same 60 fps to 30 fps in certain areas.

This has me a bit disappointed, i don't know if this is due to optimization issues, or my 280x not being powerful enough.

Thank you for your time. thumb.gif
post #2 of 7
If I am thinking correctly, the 280x is pretty much the same as a 7970. The 7970 probably wouldn't max the whole game out at 1080p at constant 60fps, but should be pretty close. So that is weird that you are getting some frame drops. Could your CPU be throttling? Check and see if your power options are set to high performance.
Edited by jonespwns - 11/6/13 at 7:20am
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post #3 of 7
As far as my knowledge goes. lower resolution=more cpu, higher resolution=more gpu
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post #4 of 7
Yea that was my understanding too. I was in the opposite situation actually. I started off at low resolution and to see what I was missing I cranked everything up to high and 1080p and no difference was observed in fact it felt smoother. When I reported these results on a different thread someone brought up the fact about my native resolution might have something to do with it.

I was playing battlefield 2 project reality on my laptop. I7 3630m with a gtx 670mx. My specs all at stock
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post #5 of 7
It could just be the game...FC3 is kinda weird behaving game, microstutter and performance all over the board. The game engine itself could be the limiting factor - assuming your have a decent enough CPU.

Most games if you lower the res/AA you get huge performance gains. Bioshock Infinite and Tomb Raider come to mind.
post #6 of 7
Thread Starter 
Yeah, Bioshock Inifnite runs like a dream. Most of the games do. Farcry 3 is ok, 60 fps average, although sometimes it stutters. I wanted to play with the settings to see if i could ensure getting the 60 fps experience the whole time, but to my surprise i didn't see any gains when lowering the resolution. That's why i asked. Assassins Creed 3 has a very inconsistent performance on my rig, i don't know how the websites that benchmarked it got so good results with the 7970 ghz (which would be similar to the 280x).
post #7 of 7
Quote:
Originally Posted by mwl5apv View Post

As far as my knowledge goes. lower resolution=more cpu, higher resolution=more gpu


Not quite..... It depends. Lower resolution could result in the exact same CPU usage. This is especially true if there is a big GPU bottleneck.
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