[Various]Zen 3, 15-20% IPC Uplift, due Q4 2020 - Page 7 - Overclock.net - An Overclocking Community

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[Various]Zen 3, 15-20% IPC Uplift, due Q4 2020

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post #61 of 62 (permalink) Old 05-31-2020, 06:31 AM
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Quote: Originally Posted by reqq View Post
Hope you're right. Ye it seems a bit odd with refresh now.
I hope I am also. Intel's Rocket Lake should be Willow cove. That is 20% IPC. AMD may get 15-17% IPC with Zen 3. Even with the current clockspeeds and level of performance, that means Intel could be extremely competitive with Zen 3. I think AMD would need to consider using the 15% performance from 5nm plus and extra 7% from the enhanced node, meaning you would multiply the 15% IPC by the 22% performance from process, which would bring the performance uplift to nearly 40% (if frequency does go up that much, otherwise they may go 30% and power savings which would kill Intel in mobile, and still is a clear win on desktop).

This is why I think they would want to do it, although it also pushes off the cadence bringing 3NM potentially within reach to use in 2022 when Intel will be on 7nm (no idea on the speeds Intel will have for 7nm after the abysmal 10nm speeds by comparison). And Intel may have another 20% IPC for the new core at that point also. And that is where AMD was managing expectations and Zen 4 was rumored to be lower IPC (12% or less IIRC, still decent uplift, and understandable wanting the 5nm switch then to make up for it; but to stay on top for a lot of it, I'd switch Zen 4 to 3nm if need be, a decision that would have to be made around March to April of 2021 (12-15 month cadence)).

But I'm hoping also. Either way, we will find out...

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post #62 of 62 (permalink) Old 06-02-2020, 05:29 AM
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Quote: Originally Posted by ajc9988 View Post
I hope I am also. Intel's Rocket Lake should be Willow cove. That is 20% IPC. AMD may get 15-17% IPC with Zen 3. Even with the current clockspeeds and level of performance, that means Intel could be extremely competitive with Zen 3. I think AMD would need to consider using the 15% performance from 5nm plus and extra 7% from the enhanced node, meaning you would multiply the 15% IPC by the 22% performance from process, which would bring the performance uplift to nearly 40% (if frequency does go up that much, otherwise they may go 30% and power savings which would kill Intel in mobile, and still is a clear win on desktop).

This is why I think they would want to do it, although it also pushes off the cadence bringing 3NM potentially within reach to use in 2022 when Intel will be on 7nm (no idea on the speeds Intel will have for 7nm after the abysmal 10nm speeds by comparison). And Intel may have another 20% IPC for the new core at that point also. And that is where AMD was managing expectations and Zen 4 was rumored to be lower IPC (12% or less IIRC, still decent uplift, and understandable wanting the 5nm switch then to make up for it; but to stay on top for a lot of it, I'd switch Zen 4 to 3nm if need be, a decision that would have to be made around March to April of 2021 (12-15 month cadence)).

But I'm hoping also. Either way, we will find out...
Maybe that tweet that said system builders or what it was that had access to next gen from both amd and intel.. who said that amd new cpu looked "to good".. has something to do with 5 nm. I mean if Intel next cpu is that good as you say maybe AMD needed 5 nm and went that roote.

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