(10-23-2012, 11:05 AM)Axxer Wrote: [ -> ]How would I go about testing where my bottleneck is in the actual GPU (such as whether it is memory badwidth or GPU clock or shader clock)?
Testing if main core ( gpu clock or shader clock ) is bottleneck is easy.
Its called "gpu load" and there are lots of programs which show that,for example msi afterburner or evga precision can even show it in game while you are playing.
If load is at 99% it means gpu is bottlenecking ( it never shows 100% for some reason ).
Testing memory bandwith is a problem,because I havent found any program which can show that. MSI or EVGA can show memory usage,but thats different.
I guess only way to test if memory bandiwth is bottleneck is the way NV suggested : try to overclock it and see if perfomance improves
(10-21-2012, 09:32 PM)DolphinRocks Wrote: [ -> ]On SSBB I can run LLE, DX9 4xIR, no SSAA at 59-60 fps with my specs at 31% GPU Load.
As soon i set 4xSSAA fps drop to ~40 at 58% GPU load.
Why isn't my GPU stressed more to get higher FPS? I can't be CPU limited from the first example, can I?
Running Dolphin x64 3.0-787
Specs:
i7-920 OC to 3.6GHz
ATI HD5870 1GB OC to 900/1300MHz
That's because you're choking your 1GB vram with that graphical setting! zzz I bet you if you lower the setting, problem fixed!
I don't think Dolphin is able to use all of your VRAM under any setting. Bandwidth maybe, VRAM itself no.
If we were talking about PC gaming and multi-monitor set up .... VRam does matter
Unfortunately , this topic is about Dolphin .
4X IR + 4X MSAA -> Doable on current high-end GPU
4X IR + 4X SSAA -> Insanely high resolution , i don't think Nvidia GTX 690 or AMD 7990 could handle this (maybe some "light" games)
4X IR + 9X SSAA -> TOTALLY NOT POSSIBLE atm
Quote:That's because you're choking your 1GB vram with that graphical setting! zzz I bet you if you lower the setting, problem fixed!
Of course lowering his settings will improve his framerate. But that doesn't prove that he ran out of video ram. It's far more likely that he's running out of memory bandwidth. Dolphin is extremely taxing on memory bandwidth even with lower settings to the point where the shader throughput becomes completely irrelevant with many GPUs.
He can monitor video ram usage using software if he needs to confirm this though.
Quote:I guess only way to test if memory bandiwth is bottleneck is the way NV suggested : try to overclock it and see if perfomance improves
Don't just OC, OC specific components, either the memory or the core.
If you see little to no improvement from raising the core/shader clock but significant improvement from raising the memory clock then you can bet that memory bandwidth is acting as a bottleneck.
My memory is supposedly running at 2100 MHz (factory OC'd) but ill have to check on that. (1050 MHz each way if you want to be technically correct).
(10-24-2012, 07:59 AM)Axxer Wrote: [ -> ]My memory is supposedly running at 2100 MHz (factory OC'd) but ill have to check on that. (1050 MHz each way if you want to be technically correct).
Isn't it suppose to be 4200 MHz?
What? 4200 MHz video memory?!?! I WANT NOW!!!
Memory, my CPU.
Also, it is 2100 as listed by EVGA (which generally means 1050 in and 1050 out).
I believe it is x4 not x2
*Waits for NV*
Really? Well then idk what the hell any of those numbers mean any more. I'm looking at GPU Z when I have the chance.