Out of curiosity, has anybody had anything in the AMD Ryzen instruction set missing that required you to purchase an Intel 9xxx instead?
Any significant differences in regards to scientific applications or machine learning?
Any significant differences in regards to scientific applications or machine learning?
(rr stands for Record and Replay Framework, it's a gdb extension which allows for reverse execution)
"The key highlight improvement for floating point performance is full AVX2 support. AMD has increased the execution unit width from 128-bit to 256-bit, allowing for single-cycle AVX2 calculations, rather than cracking the calculation into two instructions and two cycles. This is enhanced by giving 256-bit loads and stores, so the FMA units can be continuously fed. AMD states that due to its energy aware scheduling, there is no predefined frequency drop when using AVX2 instructions (however frequency may be reduced dependent on temperature and voltage requirements, but that’s automatic regardless of instructions used)"
"In the floating point unit, the queues accept up to four micro-ops per cycle from the dispatch unit which feed into a 160-entry physical register file. This moves into four execution units, which can be fed with 256b data in the load and store mechanism.
Other tweaks have been made to the FMA units than beyond doubling the size – AMD states that they have increased raw performance in memory allocations, for repetitive physics calculations, and certain audio processing techniques.
Another key update is decreasing the FP multiplication latency from 4 cycles to 3 cycles. That is quite a significant improvement. AMD has stated that it is keeping a lot of the detail under wraps, as it wants to present it at Hot Chips is August. We’ll be running a full instruction analysis for our reviews on July 7th."
https://www.anandtech.com/print/14525/amd-zen-2-microarchite...
> Any significant differences in regards to scientific applications or machine learning?
The PCIe4.0 is good for Data Science ( NVMe Disk / GPU machine learning )
"Corsair MP600 SSDs will offer up to 4950 MB/s sequential read speed as well as up to 4250 MB/s sequential write speed when used with a PCIe 4.0 x4 interface, which is substantially faster when compared to modern PCIe 3.0 x4 drives."
https://www.anandtech.com/show/14584/corsair-mp600-pcie-4-ss...
WOW! Looks like they haven't announced pricing yet. I wonder what those drives will cost.
Threadrippers are tempting but I like to play with EXSI and Intel’s virtualization is handy. My next desktop might be a Threadripper but my i7-7700K and Intel QSV is good enough for Plex and 4K.
I would like have a 10gb backbone with SFP+ so I can play with Fiber, DAC, and 10gb Ethernet.
This, unfortunately, would be a deal breaker for my home-server use case, although I'm very happy AMD is finally competitive again, overall.
One that sticks out is virtualization support in freebsd and others. I don't know if it's still true but the time risk isn't worth the cost benefit for me any more.
Reddit:"Mojave, now on Ryzen!" https://www.reddit.com/r/hackintosh/comments/a95xlo/mojave_n...
V2/V3 Xeons are dirt cheap on ebay and if you don't mind a little risk the ES versions are mighty cheap for what you can get.
I just got Dual 2667 V2, 96GB of ram, dual 1200W PSUs, and room for 20 SAS2 HDs for less than $1,000 (replaced the 2637 V2s that came with the system). I'll note power consumption will be quite a bit higher, but power is pretty cheap where I live.
.... I'll be really stoked in a few years when the Rome chips are available used.