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Strange CPU loads

1K views 3 replies 2 participants last post by  Nyrii 
#1 · (Edited)
I made a thread on this same forum a while ago so apologies for making 2 similar threads but it was spur of the moment and I had not taken the time to consider the variables. I now know the occational high GPU loads stem from the application of forced Anti-Aliasing though Radeon Pro. More to the point I'd like to know why, but that particular issue can be bypassed by tuning down AA. It however does not explain the ridiculous CPU load!

System specs and settings in sig. Using Pcsx-r svn r89907. Issue is prevelant with or without Widescreen hack/GTE accuracy. AA (and AF) is being forced at max through Radeon Pro.

CPU loads under this configuration are quite high, often hitting 100% on 2 or more cores. GPU loads remain at a nice (considering I'm forcing heavy AA) ~60%:



Every game I played gave roughly the same load until I switched Stretching Mode from "1:Scale to window size, keep aspect ratio" to "3:Try to keep pixel ratio". This gave favourable results with 3D games (Spyro, CTR, Tekken 2..) but 2D games (SOTN + Chronicles) simply stretched to full size with no black borders regardless. I also noticed that under this setting, 2D games exclusively were giving me 100% GPU load while CPU loads were relatively lower. The following image shows various statistic after playing 2 games, CTR and SOTN in succession with "#3:Try to keep pixel ratio".


Again, the GPU load is bypassed by tuning down AA from radeon pro. I would still like to know why 2D games don't respond to maintaining pixel ratio and why this somehow sends GPU load through the roof by a tweak they don't even use.

Then I had a go on Spyro the Dragon and besides the ridiculous CPU loads below notice how symmetrical CPU1 and CPU2 are, is this normal? Every peak on CPU1 (and drop is CPU2) coincides with an fps drop and a blip of lag in-game.



Again this was not caused on the combination of Nvidia card, ePSXe and inferior hardware(3570k @ stock as opposed to 4670k @ 4.5Ghz now) with similar settings. I don't have the ability to test those variables at current but I know disabling Radeon Pro and lowering graphics settings did nothing; not that it should being CPU-related.
 
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