I'm curious if VRAM speed plays a bigger role when you're gaming at higher resolutions. I know that the amount of VRAM needed increases with resolution, but I'm not sure how important the speed is. With APUs getting more powerful, I'm considering a mini PC with a lot of RAM that could function as VRAM for the integrated GPU. This setup seems like it would deliver great texture quality without significantly impacting FPS. Will the memory bandwidth affect my ability to game at 4K with an APU?
3 Answers
It's really about a mix of factors at play here. If VRAM was the only important thing, we'd all be switching to HBM with its crazy bandwidth. It'll help, sure, but it's not the end-all-be-all for gaming performance.
You need to keep in mind that the real limitation is the power of the APU itself, especially for 4K gaming. I see you said that increasing texture quality doesn’t affect FPS much, but that’s actually a major factor! VRAM speed is important, but processing power is where you really need to focus. You can have tons of VRAM, but if the APU can't handle the workload, it won't matter much.
You might get decent visuals, but remember that iGPUs still struggle compared to dedicated GPUs. The gains with faster VRAM might not be as big as you expect. Look at cards like the RTX 4080 vs the 5080, same VRAM but the performance gain is pretty marginal. Testing specific FPS scenarios for these configurations is pretty rare too, so it's tough to predict how it'll perform in the real world.
That's true! Texture settings themselves might not hit FPS hard, but the overall engine load—like lighting and distance draw—makes a bigger difference. Especially with higher resolutions!