3 ms·
Was this true back in 2011 or so? I'm genuinely curious—this may be yet another layer of me having no idea of what I was doing at the time, but I thought I reme
by adamrezich 2y ago
Was this true back in 2011 or so? I'm genuinely curious—this may be yet another layer of me having no idea of what I was doing at the time, but I thought I remember determining (somehow) that the problem was the CPU-to-GPU bottleneck. It may have been that I got 720p 30FPS working just fine, but then 1080p was in the single digits, and I just made a bad assumption, or something.
- jmb99 2y ago1080p@60 is “only” around 500MB/s, which should have been possible a decade ago. PCIe 1.0 x16 bandwidth maxed out at 4GB/s, so even if you weren’t on a top of the line system with PCIe 2.0 (or brand new 3.0!) you should have been fine on that front[1]. More than likely the CPU wasn’t able to keep up. The pipeline was likely generating a frame, storing it to memory, copying from memory to the PCIe device memory, displaying the frame, then generating the next frame. It wouldn’t surprise me if a ~2010 era CPU struggled doing so. [1] Pretty much any GPU’s memory bandwidth is going to be limited by link speed. An 8800GTS 320MB from 2007 had a theoretical memory bandwidth of around 64GB/s, for reference.