January 19, 2022

AMD may be about to present dual-socket performance to their Threadripper CPUs


In a nutshell: On the finish of final week, an AMD report describing the options and specs of the upcoming 5000-series Threadripper Professional CPUs was leaked. It mentioned that each one 5 fashions would have dual-socket performance. Shortly after, two Threadrippers appeared within the PassMark database having accomplished the benchmark in dual-socket mode – however they’re not from the 5000-series.

As an alternative, they had been two of the seventeen-month-old flagship of the 3000-series: the 3995WX. In idea, as a result of the CPU shares its {hardware} with the dual-socket-capable Epyc 77×2-series, the 3995WX has solely ever been prevented from participating in a dual-socket mode by software program limitations.

Working in tandem, the 2 CPUs achieved a rating of 123,631 factors; 35% greater than the median results of a single 3995WX, and the best rating of any two-CPU pairing within the database.

If the result’s real, which it appears to be, then there’s just one seemingly wrongdoer: AMD themselves. It’s just too unlikely that one other celebration might modify the 2 CPUs, which value some $8,800 every, and the requisite motherboard, efficiently.

As for why AMD can be experimenting with their previous CPUs, our greatest guess is that the creation of the primary dual-socket sWRX8 motherboards for the 5000-series has raised some questions on their backward compatibility. A microcode replace might conceivably allow dual-socket performance in 3000-series CPUs, although AMD doesn’t have a lot of an incentive to create one.

Credit score: Onur Binay

At a minimal, although, AMD does have an incentive to allow dual-socket performance on the 5000-series. Prior to now, doing so would’ve cannibalized the Epyc sequence; it’s one of many foremost options that differentiate the 2 product traces. However, as of 2022, the Epyc sequence might be a complete “era” forward of Threadripper and use a more recent structure at a minimal, if not a more recent node as nicely.

A lot of the accessible details about the 5000-series comes from the aforementioned report, which was acquired by Igor’s Lab. Its contents haven’t been verified past just a few match-ups with different leaks, however Igor’s Lab is a reliable supply. That mentioned, generally specs are modified within the lead-up to the processors’ announcement.

Doable Threadripper Professional 5000-series Specs

  5995WX 5975WX 5965WX 5955WX 5945WX
Cores / Threads 64 / 128 32 / 64 24 / 48 16 / 32 12 / 24
Single-Core Enhance Clock 4.55 GHz
All-Core Enhance Clock 2.70 GHz 3.60 GHz 3.80 GHz 4.00 GHz 4.10 GHz
Base Clock 2.25 GHz 2.70 GHz 2.80 GHz 2.90 GHz 2.94 GHz
L3 Cache 256 MB 128 MB 64 MB
L2 Cache 32 KB 16 KB 12 KB 8 KB 6 KB
TDP at Enhance Clock 280 W
TDP at Base Clock 229 W 190 W 171 W 152 W 138 W

There’s now solely Professional (with a “W”) variations of the processors, based on Igor’s Lab. This yr, there are 5, up from 4; the addition was of the 24-core mannequin.

On the entire, the specs of those processors aren’t too totally different from their predecessors. Their all-core clock speeds are a few hundred megahertz larger or decrease in some instances, however broadly related. Solely their single-core clock velocity is a constant improve of 250-350 MHz.

Just like the Ryzen 5000-series, the largest improve is underneath the hood: the Zen 3 structure. In our testing, it might present an IPC efficiency uplift of 10-20% in numerous functions. It would present an excellent bigger uplift on higher-core rely fashions that profit from its spectacular inter-core and cache latency, vastly improved over the Zen 2 structure of the 3000-series.

But it surely’s extra more likely to be the dual-socket performance driving the gross sales, ought to it eventuate. It might be attention-grabbing to see what 128 unlocked cores can do.

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