Quote:
Originally Posted by NeverBackDown
This was the natural progression and this is going to be a serious CPU. Working on 7nm+ as well should also help push IPC further.
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Yeah. AMD needs to minimise the downsides of their Zen processor design, and eliminating inter-CCX latencies will be an important step. There will still be inter-die latencies, but giving each CPU core full access to 32+MB of L3 cache is a big deal.
A lot of the reason behind the old "each CCX has four cores" design was due to AMD's restricted budget. It allowed AMD to use quad-core CCX's in mobile and desktop parts without too much redesigning. AMD's original Zen CPUs needed to be cheap to develop over multiple product stacks. Remember that AMD didn't even make a profit back then.
7nm+ will help, but IPC comes from core design changes, not a node shrink. A new node can help with clocks, power and transistor size scaling. The IPC boosts come from core design changes. 7nm+ will be a minor leap from 7nm (when compared from the shift from 14/12nm to 7nm), so Zen 3 will rely on big design changes.
Quote:
Originally Posted by Dawelio
I assume this is quite far away, seeing as 3rd gen just recently launched?... And will it be compatible with AM4 or no?...
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Zen 3 is expected in summer 2020. AM4 compatibility is expected, as Zen 4 should be when AMD moves to DDR5.
Quote:
Originally Posted by g0ggles1994
I'd hazard a guess that Zen 3 will be the last consumer CPU on AM4 as it fits the 'AM4 support until 2020' timeframe. Then Zen 4 will go onto AM5 with DDR5 and PCIe 5.0 after the Zen 4 based EPYC line is launched
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This is my guess as well. If Zen 3 Milan can use the same socket as today's EPYC parts, then there is no reason why Zen 3 Ryzen won't get the same treatment.
AMD's next socket will be a push to DDR5, something that actually requires a socket change. Yes, they could make CPUs that support both DDR4 and DDR5, but if we are honest that tactic has never really worked that well in the consumer market. Some Skylake motherboards supported DDR3 IIRC, but I don't think I have seen anyone on this forum using one of those boards.