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The effect of resolution on CPU performance in gaming?

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  • Resolution
  • Graphics Cards
  • CPUs
Last response: in CPUs
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October 14, 2014 12:26:15 PM

I noticed gaming benchmarks for CPUs always seem to go to low resolutions like 720p to try to eliminate the video card as much as possible when testing CPUs. But does the resolution the game is played at matter at all for CPUs? I'm not a game programmer though, so I'm wondering whether the following is true:
1. The CPU handles the locations of every object ingame
2. The CPU computed how these objects move forward in time
3. The CPU does the collision detection
4. The CPU usually handles the physics often the physics
5. The CPU determines which object is in front and thus which is drawn (e.g., the guy I'm shooting at is hiding behind a wall, so it tells the graphics card to draw the wall and only the part of the guy not covered by it)

So all you're doing is using a different scaling factor when computing coordinates in 1080p vs 720p? All the calculations should be the same (other than the scale) and take the same time and memory assuming the same detail preset? Or is this wrong? Should I expect a jump in resolution to only be limited by the video card and not the CPU when the CPU handles fine at a lower resolution but the same detail level?

More about : effect resolution cpu performance gaming

a b U Graphics card
a b à CPUs
October 14, 2014 1:02:25 PM

at 1600x1200
FPS:
22.5

Score:
566

Min FPS:
13.4

Max FPS:
46.7

Settings

Render:
Direct3D11

Mode:
1600x1200 8xAA fullscreen

Preset
Custom

Quality
Ultra

Tessellation:
Extreme



at 1024x768

FPS:
42.5

Score:
1071

Min FPS:
20.5

Max FPS:
111.2

Settings

Render:
Direct3D11

Mode:
1024x768 4xAA fullscreen

Preset
Custom

Quality
Ultra

Tessellation:
Extreme


so ya it looks that way
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a b U Graphics card
a b à CPUs
October 14, 2014 1:07:20 PM

the speed of the cpu and how fast it can calculate is true if a highe end runs pie in 9 sec. to one that runs it in 18 sec. that affect should carry over speed is king a fast efficient processor is just what it is
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a b U Graphics card
a b à CPUs
October 14, 2014 1:10:35 PM

boy this site is really blowing chunks today
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Best solution

a c 203 U Graphics card
a c 163 à CPUs
October 14, 2014 1:16:00 PM

A higher res could mean a larger fov so you could have more objects on screen and thus higher cpu usage.
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a b U Graphics card
a b à CPUs
October 14, 2014 1:25:11 PM

work = time
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a b U Graphics card
a b à CPUs
October 14, 2014 2:10:11 PM

It really depends on the 3d Engine. 3D Mark has CPU+GPU benchmarking and yes at lower resolutions It will be more apparent in seeing a CPU struggling with a higher end GPU. Lots of benchmarks include Lower Resolutions.
A GPU bound benchmark like Valley 1.0 is going to pretty much have similar scores across a wide platform of processors with the same GPU. Say a GTX 680 or 770 would get around 1700-1800 using an i3, i5, or i7 from Sandy bridge to Haswell.
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a b U Graphics card
a b à CPUs
October 14, 2014 2:35:01 PM

A GPU bound benchmark like Valley 1.0 is going to pretty much have similar scores across a wide platform of processors with the same GPU.


I was just testing that earlier today with a card and found a good oc on the card did not change much [if really any] with valley as it did heaven ---

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October 14, 2014 6:15:17 PM

Eh, nevermind.
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October 14, 2014 6:26:32 PM

.
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