Thursday, October 10th 2019
AMD TRX40 Chipset Not Compatible with 1st and 2nd Gen Threadrippers
AMD is giving finishing touches to its 3rd generation Ryzen Threadripper HEDT processor lineup, and the first wave of these chips, starting with a 24-core model, will launch alongside the AMD TRX40 chipset. It turns out that the chipset won't be compatible with 1st and 2nd generation Ryzen Threadripper processors. The upcoming 3rd generation Threadripper chips won't be backwards-compatible with the AMD X399 chipset, either. We've been hearing from reliable sources rumors of this segmentation from AMD for a few days now, and tech journalist ReHWolution just tweeted its confirmation having obtained info on upcoming motherboards from a leading brand.
The underlying reason between this restriction remains a mystery. We know that the EPYC "Rome" MCM is pin-compatible with first-generation EPYC "Naples" chips due to the fact that the newer chips are drop-in compatible with older servers via a BIOS update. The TR4 socket, too, is nearly identical to SP3r2, but for four out of eight memory channels being blanked out. It remains to be seen if for TRX40 motherboards, AMD re-purposed these unused pins for something else, such as additional PCIe connectivity or more electrical pins. We'll find out in November, when AMD is expected to launch these chips.
Source:
ReHWolution (Twitter)
The underlying reason between this restriction remains a mystery. We know that the EPYC "Rome" MCM is pin-compatible with first-generation EPYC "Naples" chips due to the fact that the newer chips are drop-in compatible with older servers via a BIOS update. The TR4 socket, too, is nearly identical to SP3r2, but for four out of eight memory channels being blanked out. It remains to be seen if for TRX40 motherboards, AMD re-purposed these unused pins for something else, such as additional PCIe connectivity or more electrical pins. We'll find out in November, when AMD is expected to launch these chips.
66 Comments on AMD TRX40 Chipset Not Compatible with 1st and 2nd Gen Threadrippers
See? Told ya it wont be.
At the same time. Only 2 gen support for HEDT on AMD is bad. Man even X370 can use RyZen 3xxx. I was hoping to put in quote for updating the TR builds in lab as well as helping other labs to upgrade their TR based system. The lab has one 1950X build, 3 2950X builds and 1 2990WX builds. Now that upgrade path is gone. Bummer for sure. I mean the 2990WX runs on Linux and is only used for comparative genomic analysis, NUMA issue is not too bad for that one.
Shame AMD, shame. I had higher hope for you. :( :( Zen+ based TR 2xxx series had 24 and 32 cores, can be overclocked over 4GHz. Power delievery is a non issue for the X399 boards released last year.
Still, I can't complain; Even if you add the cost of those X399 boards, 1950x + new board ran circles around the Intel CPU-only costs for those nodes added to the farm, both in actual performance and also in performance/$
Example of a DNA sequence alignment
A lot of bioinformatics tools benefit a huge amount from implementation of AVX512. See this paper over here actually discussing the benefit of AVX512 in research
www.ncbi.nlm.nih.gov/pubmed/29726911
I wish AMD will have AVX512 support on their Zen arc soon.
Bioinformatics is a niche of computer use not the sole use or AMD would be in trouble.
Had Epyc Rome force a change in socket, one would expect TR gen 3 to do the same, but since it didn't ... something doesn't add up here!
It is HEDT we are talking about here. With its higher core count and good pricing AMD has seen some good adoption in research labs. What I was saying is the now widely used AVX512 and soon-to-be implemented Deep Learning Boost will slowly claw back the marketshare and mindshare from Threadripper again.
As a matter of fact one of my friend at Oregon State University working for HPC maintenance is already seeing some "buyer's remorse" Oregon State spent a crap ton of money on EPYC processors for bioinformatics applications.
www.advancedhpc.com/wp-content/uploads/2018/09/18165553-AMD-OSU-AHPC-Case-Study.pdf
Mainstream desktop nobody cares about AVX512 that much. That I agree RyZen 3xxx is killing it.
IIRC Asus had a VRM cooling kit for one of their boards, MSI launched some updated ones.
Putting out new specifications is a safe route. Mobo makers will have proper power delivery, buyers will not have burning mobos.
To all the "they killed muh X399"-criers: Where were you when Intel launched a new Socket and chipset nearly every generation?
And with that been said Zen 2 now has double the FP throughput so 24 cores should nicely match Intel's top of the line 18 core part even with AVX 512.
We have to remember that this platform is meant for workstations, which makes reliability the most important trait. Motherboard makers are already barely maintaining support for any motherboard beyond 2 years, and they certainly don't test each model with enough hardware before shipping a BIOS update. As we've seen with AM4, the compatibility with older hardware is questionable at best. And while AMD motherboards are getting the same premium prices as some "premium" Intel boards, certain makers still fail to deliver the same quality (*ahem* MSI, Gigabyte…). If anything AMD should focus their energy on two things; 1) Firmware testing ahead of product launch 2) Put pressure on motherboard makers to do their best when making the BIOSes. A few hiccups after a product launch is excusable, repeated problems three months later is a deal breaker for workstation use.
Or is that a Xeon only thing?