06-11-2018, 03:27 AM
so for the past 7+ years I've been only using the 5700/5800 series Radeons, and from time to time I would test PCSX2 to see the progress, I was mainly trying GTA VCS and it was never fullspeed, the intro would already drop to 80% or so, I tried all sorts of settings, no luck at getting constant fullspeed.
fast forward to a few months ago, I got an r7 370 which is less old, and tried PCSX2 again after a while and I was shocked, it all just worked fullspeed, same CPU and rest of the system, VCS at full speed and all the other games I tried (HL1, Guitar Hero, SSX3, Automodelista), the hardest I tested was GTA LCS, which under heavy conditions (like rain and the bad spots in the city) still clearly dropped from full speed but not much, using the 3 cores option helped a lot... now sadly the card became defective and I placed the 5800 back in its place and.... it's back at being slow, the save state that would run at fullspeed on LCS now runs at half speed or less, and I tested all the default plugin options (DX11, DX9, OGL) and no luck, DX11 works the least slow, and also native resolution and so on.... the odd thing is, the GPU utilization is not high, the CPU utilization doesn't look all that different than with the r7 370, but it's all A LOT slower....
so I ask, is it a known fact that these older Radeons like the 5850 have some bad driver overhead or something with PCSX2? or what's going on?
it's the same OS install and every other piece of hardware, just removing the 370 which was running driver 18.3 or something, to the 5850 which runs 15.7 or something (it has newer beta drivers available but they don't change much and are from the same period with the same capabilities), outside of that in what I tested the 5850 is performing as usual.
fast forward to a few months ago, I got an r7 370 which is less old, and tried PCSX2 again after a while and I was shocked, it all just worked fullspeed, same CPU and rest of the system, VCS at full speed and all the other games I tried (HL1, Guitar Hero, SSX3, Automodelista), the hardest I tested was GTA LCS, which under heavy conditions (like rain and the bad spots in the city) still clearly dropped from full speed but not much, using the 3 cores option helped a lot... now sadly the card became defective and I placed the 5800 back in its place and.... it's back at being slow, the save state that would run at fullspeed on LCS now runs at half speed or less, and I tested all the default plugin options (DX11, DX9, OGL) and no luck, DX11 works the least slow, and also native resolution and so on.... the odd thing is, the GPU utilization is not high, the CPU utilization doesn't look all that different than with the r7 370, but it's all A LOT slower....
so I ask, is it a known fact that these older Radeons like the 5850 have some bad driver overhead or something with PCSX2? or what's going on?
it's the same OS install and every other piece of hardware, just removing the 370 which was running driver 18.3 or something, to the 5850 which runs 15.7 or something (it has newer beta drivers available but they don't change much and are from the same period with the same capabilities), outside of that in what I tested the 5850 is performing as usual.