Rootax
Veteran
Zen2 seems very good with AVX (even with a slower speed VS non-avx workload)
Source : https://proclockers.com/reviews/cpus/amd-ryzen-9-3900x-am4-cpu-review/page/0/4
Source : https://proclockers.com/reviews/cpus/amd-ryzen-9-3900x-am4-cpu-review/page/0/4
Ike Turner
Veteran
From memory that's fairly normal for Nvidia, especially on DX12. It was noticeable in Tomb Raider in particular but basically the Nvidia drivers are highly tuned for Intel CPUs and their optimizations for multi-threading in DX12 didn't scale beyond 4 cores and weren't nearly as apparent on Ryzen CPUs.
Edit: Added AdoredTV video where he was investigating it when Ryzen was first released.
Edit: Added AdoredTV video where he was investigating it when Ryzen was first released.
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That's made from 3 different reviews though, so it's not exactly scientific comparison (but yes, it does illustrate that there seems to be some issues with NVIDIA+Zen2 combo, shown elsewhere too)Also, one interesting find
https://www.overclock3d.net/reviews..._7_3700x_ryzen_9_3900x_x470_vs_x570_review/11
So it seems to be true that PCIE4 uses the same traces as PCIE3, essentially offering plug&play support on older boards. GamersNexus had videos about it few months back and they mentioned that plans for certifying older AM4 boards for PCIE4 were in motion, but that manufacturers were doubtful.
Also, Techpowerup intentionally aimed to test 3900X on a "cheap" B350 motherboard. Zero issues, worked as good as on X570.
https://www.techpowerup.com/review/amd-ryzen-9-3900x-tested-on-cheap-b350-motherboard/
So it seems to be true that PCIE4 uses the same traces as PCIE3, essentially offering plug&play support on older boards. GamersNexus had videos about it few months back and they mentioned that plans for certifying older AM4 boards for PCIE4 were in motion, but that manufacturers were doubtful.
Also, Techpowerup intentionally aimed to test 3900X on a "cheap" B350 motherboard. Zero issues, worked as good as on X570.
https://www.techpowerup.com/review/amd-ryzen-9-3900x-tested-on-cheap-b350-motherboard/
It's apparently AMD that backed out of PCIe4 on older boards, at least some X470 boards got beta BIOSes with PCIe4 support
Apparently something to do with power draw. de8auer tested PCIe4 NVMe on X570 and found the power draw to be basically the same as PCIe3 NVMe, whilst maintaining the full 5Gb/s transfer rate and he's unsure why there is such a high TDP rating on the chipset and why there are heatsinks and fans on them. Maybe running sustained large transfers in RAID0 mode.
It's probably just the PCIe4 compatible PHYs and controllers that draw up that much more power regardless of which mode they run in. From motherboards perspective there shouldn't be much of a difference, what "X470 PCIe4" really means is "Ryzen 3000 PCIe4", only thing that matters from the perspective of motherboard is wether the routing of PCIe wires from CPU socket to PCIe slot is compatible with PCIe4's tighter requirements, chipset is in no way involved.
Doesn't the X570 chipset provide four extra PCIe lanes as well?
Not everything goes to the CPU socket though. Additional NVMe drives (which is how de8aur tested it, not the primary), SSD SATA drives and secondary PCIe slots all go to the chipset, not the CPU directly.
Yes, I believe that's what was being tested.
The talk about PCIe4 for older boards was always only for the slots connected to CPU, never for chipset
hoom
Veteran
https://www.techpowerup.com/257249/intel-10th-generation-core-comet-lake-lineup-detailed
Intel reply is bumped up clocks & reduced TDP, increased core count & HT spread to lower SKUs but still old core architecture & new iteration of 14nm, no ETA.
Amazing times!
After the failure of Bulldozer I was really feeling AMD could never be competitive with Intel again but here we are
Edit: Oh this is not actually an official announcement, its sourced via wccftech from computerbase forums and based off some Chinese tech forum...
Still amazing times though.
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According to latest (leaked) roadmaps 14nm is far from over, sure the mobile and server space are getting Intel 10 nm this year and the next, but desktop isn't excepted to get it's first 10nm until 2022 (unless they jump straight to 7nm on desktop, but that's still 2022 at the earliest, 2021 still has new 14nm in store)
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