ALERT! TrackMania series: CPU/GPU sync causes performance abnormal w/ low usage GPU
I got only no more than 70% GPU usage at high resolution screen. I changed from "immediate" to "none" on «CPU/GPU synchro»* for improve (+/- 2x) performance to back to normal. Now I got 99% GPU usage at same resolution!!
http://forums.guru3d.com/showthread.php?p=4091802
I changed it to none and now get 100% gpu usage.
I did a load of messing after posting last night, closed a load of stuff down and just left Afterburner on so i could watch temps, loads etc
The V-Sync issue went, and i got benchmarks from 400+ to 38fps on V.Nice. I had 60/60/59/58 beforehand, then somehow on V.Nice im getting worse results.
V.F = 400+fps with 50/50% usage on either card
F = mid 200s with 99/97% usage on either cards
N = 85fps with 99/97% usage on either cards
V.N = 38fps with 90% usage on GPU1, 55-80% usage on GPU2 (may have been other way around).
I've disabled CPU/GPU sync, i know that was something i messed with last night, putting it to 2. Im not against V-Sync or that CPU/GPU sync as long as the cap its giving provides smooth gameplay. I dont need 80-100+ frames, if 20, 40, or 60 is smooth as silk thats fine. But its certainly handy removing caps like those to understand performances. Cheers for pointing that one out. Doesnt seem to be influencing my scores though.
Nothing really seems to be making any sense, best i seem to be able to get from their benchmarks is 100fps & 42fps just from Nice & V.Nice and V.Nice still doesnt max out my GPU usage, im still only getting 55-75% on GPU1 and 90-84% on GPU2.
It'll max it for lower settings and be rock solid at 99/97% but V.Nice its like it takes it easy.
CPU Usage is light, boosts to 3.5ghz occasionally but the load on 1 core never gets beyond about 70%, 40-70% i'd say, the other 3 cores just seem to be watching, 25-40% load maybe. So the CPU isnt a bottleneck.
Clearly its working in crossfire because lower settings are being maxed on both cards, and yet when its needed most it doesnt show up. Im getting roughly 150% usage rather than the 200% i get on lesser settings.