Does anyone know how the memory overclocking is going to work for W790 motherboards? The boards only support RDIMMs, and claim “1DPC Up to 6800+ MHz (OC)”, but I’ve never heard of RDIMM overclocking.
With the DDR5, UDIMMs and RDIMMs are key’d differently so the overclocking promise isn’t applicable to UDIMMs used on the platform (because they can’t be used).
Cant wait for an upgrade from my current 2nd gen Xeon platform on my WS, was planning on picking up icelake but on hold due to this new sapphire rapid hedt, gunna be nice to get away from my xeon 8280 based machine and get some more modern hardware
I like the boards, AM5 is too small and Threadripper Pro too big, if Saphire Rapids gets somehow good, I’ll go back to Intel.
But as I know Intel, the prices are at Threadripper Pro level or higher and the performance is not really better.
I’ve been holding off even worse, I’m still running roughly a dozen ivybridge and broadwell blades crunching massive sweeps of FGMRES problems and would really like to consolidate the systems and maybe cut down on power usage… be nice if studies would complete faster too.
The way I see it the cheapest threadripper pro is ~2200USD because 5965WX is the minimal viable threadripper, the 5955WX and 5945WX are only 2 chiplets and won’t be able to saturate the 8 memory channels they are supposed to have.
I haven’t tested this but I believe it takes a 5995WX to fully saturate the memory write budget on TR pro; similar to how a 5800x has half the write bandwidth of a 5900x
/speculation
The W-3435X is the sweet spot for Intel’s HEDT I think, you get the golden cove cores that are comparable to zen 4, you have the full 8 memory channels of memory bandwidth and it’s “only” 1600USD compared to having to buy a 6600USD 5995WX to get full platform memory bandwidth.
You could go into the W-2400 Xeons with those needs; They are supposed to be a monolithic MCC die instead of the chiplet XCC dies the w-3400 use so power consumption should be alot better than a chiplet design.
If AMD does another timed exclusive with lenovo, we won’t see threadripper 7000 until well into 2024.
If it turns out these workstation sapphire rapids don’t have memory overclocking I’m going to think about going epyc genoa instead… the price of a 16-core 9174F is like 4000USD which is steep though.
ahhh so it will be non-JEDEC/overclockable RDIMMs, sounds kind of oxymoronic but exciting at the same time.
I just checked Asrock’s site and they have the memory QVL up for w790 now and it shows a bunch of 4800-6400mhz dimms with previously unused prefixes, looks like we’ll be getting a new class of memory!
I’ve got my hands on the Supermicro X13SWA-TF board (and same as with M12SWA-TF, they still haven’t bothered updating the “both 8-pins required” sticker despite having three 8-pins…).
The board’s manual and Intel’s DDR5 datasheet seem to suggest 5600 MHz being the maximum RAM speed for this board, though (and so far, ADATA seems to be the only one testing their RAM against this board).
ADATA did have X13SRA-TF (the 4 channels board) paired with w5-2455X running 5600 MHz in the screenshot in their press release. I’m keeping my fingers crossed that you’d be able to do the same with X13SWA-TF.
I’m inline with you on the memory speed supported after reading the adata press release.
Also this is the first time I’ve seen the VRM on these overclockable RDIMMs and they’re huge; they gotta be twice the size of normal registered DDR5 or even the overclocker’s DDR5 VRM:
