4 ms·
That's tautological. Commenter above is saying that IPC may have gone down. You're asserting that it didn't without any evidence. There are also plenty of ot
by hwillis 3y ago
That's tautological. Commenter above is saying that IPC may have gone down. You're asserting that it didn't without any evidence.
There are also plenty of other reasons speed doesn't translate well to performance, like thermal limits and memory bottlenecking.
- alkonaut 3y agoSince there are small yet positive IPC improvements each generation it’s a reasonable assumption/expectation that at least IPC is no worse in gen 14 than in the generations immediately before it. Sure, until there are benchmarks we can’t know this. If I knew thus I’d no doubt be under NDA or embargo. But I’d be willing to bet that IPC difference is pretty small. > There are also plenty of other reasons speed doesn't translate well to performance, like thermal limits and memory bottlenecking. Indeed, the more interesting unknown for a new CPU gen these days isn’t what’s happened to IPC but how long and how many cores can actually run at peak clock. In terms of real perf that’s probably a much bigger unknown factor in the performance. When I see 6GHz I wonder if that’s for 1 core for one second… But that’s exactly why the thing that’s reasonably easy to guess is exactly that: the peak/instantaneous/theoretical single core perf. And actual “real world” perf is much harder to make any guesses about. If you take the IPC of the last gen and the clock of the next gen you have a pretty good value if you want to guesstimate the peak single core perf.
- PH95VuimJjqBqy 3y agono it's not, it's practical. causality does not imply causation but it sure as shit points a gigantic neon sign at it.