PC Gaming

8207 readers

510 users here now

For PC gaming news and discussion. PCGamingWiki

Rules:

Be Respectful.
No Spam or Porn.
No Advertising.
No Memes.
No Tech Support.
No questions about buying/building computers.
No game suggestions, friend requests, surveys, or begging.
No Let's Plays, streams, highlight reels/montages, random videos or shorts.
No off-topic posts/comments.
Use the original source, no clickbait titles, no duplicates. (Submissions should be from the original source if possible, unless from paywalled or non-english sources. If the title is clickbait or lacks context you may lightly edit the title.)

founded 1 year ago

MODERATORS

[email protected]

Nvidia’s RTX 5090 now rumored to have superfast clock speeds – as well as being super-slim – could this GPU be too good to be true? (www.techradar.com)

submitted 2 months ago by [email protected] to c/[email protected]

14 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 17 points 2 months ago* (last edited 2 months ago) (1 children)

GPU code is more amenable to high clock speeds because it doesn’t have the branch prediction and data prefetch problems of general purpose CPU code.

Intel stopped chasing clock speed because it required them to make their pipelines extremely long and extremely vulnerable to a cache miss.

[–] [email protected] 10 points 2 months ago* (last edited 2 months ago)

also to bring a rudamentary comparison:

a cpu is a few very complicated cores, a gpu is thousands of dumb cores.

its easier to make something doing something low in instructions(gpu) faster than something that has a shit ton of instructions(cpu) due to like you mention, branch prediction.

modern cpu performance gains is focusing more on paralellism and in the case of efficiency cores, scheduling to optimize for performance.

GPU wise, its really something as simple as GPUs are typically memory bottlenecked. memory bandwidth (memory speed x bus width with a few caveats with cache lowering requirements based on hits) its the major indicator on GPU performance. bus width is fixed on a hardware chip design, so the simpilist method to increase general performance is clocks.