3 ms·
I don’t know if this goes for VRAM, but I know that with system RAM, applications care very little about data rate and very much about timings. This includes ga
by jorvi 3y ago
I don’t know if this goes for VRAM, but I know that with system RAM, applications care very little about data rate and very much about timings. This includes games.
I do know that overclocking VRAM (or at least GDDR6) barely increases performance, but that’s mostly because it’s usually already been pushed to the edge at stock. My old 3070Ti could easily overclock 10-15% higher, but the memory had to self-correct significantly more errors so the actual improvement was a wash.
I’m also curious if gaming handhelds would benefit from switching their entire memory architecture over to VRAM, like both consoles have done in this generation.
- ben-schaaf 3y agoTimings are much less important for GPUs than bandwidth; the cores are slow and doing the same work on similar memory. A 3090 has ~270ns of memory latency - <70ns is normal for a CPU. See https://chipsandcheese.com/2021/05/13/gpu-memory-latencys-impact-and-updated-test/ https://chipsandcheese.com/2021/05/13/gpu-memory-latencys-im...
- jorvi 3y agoMaybe I’m misunderstanding the article, but there’s multiple places where they mention memory latency being the main bottleneck. At any rate, thanks for sharing! Interesting stuff.
- lynguist 3y agoNo, it’s really bandwidth. Big GPUs have on the order of 800 GB/s memory bandwidth and big CPUs only 80 GB/s! Except for Apple. They really need to up the bandwidth. GPU performance is proportional to both bandwidth and compute.