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7nm AMD EPYC "Rome" CPU w/ 64C/128T to Cost $8K (56 Core Intel Xeon: $25K-50K)
Yesterday, we shared the core and thread counts of AMD's Zen 2 based Epyc lineup, with the lowest-end chip going as low as 8 cores while the top-end 7742 boasting 64 and double the threads. Today, the prices of these server parts have also surfaced, and it seems like they are going to be quite a bit cheaper than the competing Intel Xeon Platinum processors.
The top-end Epyc 7742 with a TDP of 225W (128 threads @ 3.4GHz) is said to sell for a bit less than $8K, while the lower clocked 7702 and 7702P (single-socket) are going to cost $7,215 and $4,955 (just) respectively. That's quite impressive, you're getting 64 Zen 2 cores for just $5,000, while on the other hand Intel's 28-core Xeon Platinum 8280 costs a whopping $18K and is half as powerful.
(Score: 2) by takyon on Monday June 24 2019, @10:52AM (1 child)
I forgot to mention that the industry is moving towards a rudimentary form of stacking: Wafer-on-Wafer (WoW), which can be used to stack two processors. It has the advantage of bringing sets of cores (modules) closer together which helps with chip latency. It isn't mentioned how you would deal with the extra heat, which would rise from the bottom wafer to the top one.
TSMC’s New Wafer-on-Wafer Process to Empower NVIDIA and AMD GPU Designs [engineering.com]
TSMC Will Manufacture 3D Stacked WoW Chips In 2021 Claims Executive [wccftech.com]
So you get a doubling of transistors within the same footprint, and up to a doubling of multi-core performance (I assume less than 2x if clocks drop). Maybe as soon as 2021 and tied to a TSMC "5nm" node.
[SIG] 10/28/2017: Soylent Upgrade v14 [soylentnews.org]
(Score: 2) by HiThere on Monday June 24 2019, @08:10PM
Yes. They've been edging towards 3-D chips since the early 80's, perhaps earlier. But I'm not sure (yet) that this "stacking" is primarily aimed at increasing 3-Dness. It seems like it may be aimed more at increasing the percentage of good chips.
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