Well (for the nth time!
) the topic is not MAME's performance with GPUs,, but GroovyMAME's frame_delay performance with GPUs, under various configurations.
Unlike baseline MAME that uses the GPU only for video output and shaders, Groovy needs some of its actual processing power for lag reduction. And with higher resolution displays apparently the requirements are many steps above that of low res CRTs, I will focus on the former.
Anyway tomorrow I'll go fetch that R9 380X, fingers crossed it works fine (didn't pay much for it and I have trust issues when it comes to used PC hardware, in particular from ebay), then I can begin my little benchmarking adventure, maybe with a chart it'll become clearer to readers what this is about.
It'll take some time tho...
EDIT: damn Murphy's Law really is powerful these days, especially when buying off eBay
- received both cards, a 380x and... a 380 instead of the 370 I ordered. that 380 is a 'small' one comparable a boosted 370, but the power requirements are still that of a 380, too close to the 380x naturally, so rather redundant
- both require 2x 6pin pcie and I didn't realize I'm short one cable (of course none included in the boxes)
:/
Gonna pick the one that works best and resell the other quickly. I hate eBay but here it's really the last remaining place to find a broad variety of old hadware stuff, our local amazon isn't furnished enough in used and refurbished goods anymore (or not
that old)
I'll limit my benchmarking to three cards then, 750Ti, 260X and one of the 380's, should be enough anyway.