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A Little 1200P vs. 1080P FPS and usage calculation

post #1 of 2
Thread Starter 
Boredom strikes.
I was thinking about buying a 27" 1080p monitor so I diddled the math to figure out how much less my GPU's were going to be stressed.
Thought I'd post it just for S&G's headscratch.gif As minute or insignificant as it might be, it's interesting to see what the logistics are.
Code:
*Specs
-1200p, 3120 pixels, 1920x1200 dimension, 16:10 aspect ratio
-1080p, 3000 pixels, 1920x1080 dimension, 16:9  aspect ratio

*1080p is
3.85% less resolution, theoretically 3.85% higher frame rate, 
and theoretically 3.85% lower usage using frame limiter

*FPS difference, Frame Limiter OFF
(1200p) 120FPS + 3.85% = 124.62FPS (1080p) ~ 4.62FPS added
(1200p)  60FPS + 3.85% =  62.31FPS (1080p) ~ 2.31FPS added
(1200p)  30FPS + 3.85% =  31.15FPS (1080p) ~ 1.15FPS added
(1200p)  15FPS + 3.85% =  15.57FPS (1080p) ~ 0.58FPS added

*GPU Usage, Frame Limiter ON
(1200p) 100% - 3.85% = 96.15% (1080p)      ~ 3.8% freed
(1200p)  50% - 3.85% = 48.07% (1080p)      ~ 1.9% freed
(1200p)  25% - 3.85% = 24.03% (1080p)      ~   1% freed

*Proposed IF linear VRAM usage, Frame Limiter OFF or ON
(1200p) 2.00GB - 3.85% = 1.92GB (1080p)    ~ 80MB freed
(1200p) 1.50GB - 3.85% = 1.44GB (1080p)    ~ 60MB freed
(1200p) 1.28GB - 3.85% = 1.23GB (1080p)    ~ 50MB freed
(1200p) 1.00GB - 3.85% = 0.96GB (1080p)    ~ 40MB freed

*Proposed IF linear 12v Power Consumption, Frame Limiter ON
(1200p) 500w - 3.85% = 481w (1080p)        ~ 19w freed
(1200p) 400w - 3.85% = 384w (1080p)        ~ 16w freed
(1200p) 300w - 3.85% = 288w (1080p)        ~ 12w freed
(1200p) 200w - 3.85% = 192w (1080p)        ~  8w freed

463
463

Some of this is dependent upon using a frame limiter and being able to fill that limit 100% of the time while the GPU never stresses more or less. That never happens so it's a malleable round-about figure.
Edited by pengs - 3/24/12 at 12:25pm
post #2 of 2
Thread Starter 
Fixed. I knew I would make a stupid mistake. Didn't add the resolution correctly.
Edited by pengs - 3/24/12 at 12:18pm
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