Amd epyc full#

The CPUs are AMD's first datacenter chips with support for DDR5 memory. Looking beyond raw performance Epyc 4 also delivers a number of memory and I/O improvements over Milan. While AMD will tell you Epyc 4 squeezes more work out of each watt, that doesn't change the fact that the higher power envelope poses a challenge for server builders tasked with finding a way to dissipate all of that heat, and the datacenter operators that have to power those systems.

What is new is the move from TSMC's 7nm to its more advanced 5nm process and the use AMD's Zen 4 cores, which doubles the L2 cache to 1MB per core. The actual core layout of these chiplets, however, remains largely unchanged from Milan, with eight cores sharing 32MB of 元 cache between them. The larger package makes room for four additional Core Complex Dies (CCDs), bringing the total to 12. Taking a peek under Genoa's now even larger heat spreader - yep, there's a new socket too - reveals just how AMD has managed to cram so many cores into a single package. As usual we recommend taking these claims with a healthy grain of salt. Combined with higher core counts and clock speeds, Ram Peddibhotla, AMD VP of Epyc product management, claims its flagship 96 core Epyc 4 CPUs are twice as fast as last year's 64-core Milan parts in a variety of cloud, high-performance compute (HPC), and enterprise benchmarks. So there are some trade-offs involved in performance gains from the extra cache versus performance losses from staying within the SP5 platform’s TDP ranges.Īs with Bergamo, we expect to have a bit more on Genoa-X soon.However, the IPC gains are only part of the story.

The additional cache and its placement on top of the CCD means that V-cache equipped CCDs are a bit more power hungry, and the cache die does pose some additional challenges with regards to cooling. AMD hasn’t disclosed the TDPs, but based on Milan-X, we’re expecting a similar range of TDPs. AMD EPYC 9084X Genoa-X ProcessorsĪs these are otherwise stock Genoa chips, Genoa-X chips use the same SP5 socket as Genoa and Bergamo. But, as we saw with Milan-X, in the right situation the performance benefits can be significant.

This typically only a subset of server/workstation workloads, such as fluid dynamics, databases, and electronic design automation, which is why these high cache chips serve a narrower portion of the market.

Amd epyc full#

To make full use of the additional cache, a workload needs to be cache capacity limited – that is to say, it needs to significantly benefit from having more data available on-chip via the larger 元 cache. Like its predecessor, these high-cache SKUs are aimed at a niche market segment of workloads that benefit specifically from the additional cache, which AMD terms their “technical computing” market. In this case, with 12 CCDs on a Genoa/Genoa-X chip, this allows AMD to add 768MB of additional 元 cache to the chip. Like its predecessor, AMD is using cache die stacking to add further 元 cache to otherwise regular Genoa Zen 4 CCDs, giving AMD a novel way to produce a high-cache chip design without having to actually lay out an fab a complete separate die. Genoa-X is the successor to AMD’s first-generation V-cache part, Milan-X.

With this additional cache, a fully-equipped Genoa-X CPU can offer up to 1152MB of total 元 cache. First revealed by AMD back in June of last year, Genoa-X is AMD’s now obligatory V-cache equipped EPYC server CPU, augmenting the 元 cache capacity of AMD’s core complex dies by stacking a 64MB 元 V-cache die on top of each CCD. Alongside today’s EPYC 97x4 “Bergamo” announcement, AMD’s other big CPU announcement of the morning is that their large cache capacity “Genoa-X” EPYC processors are shipping now.