A pair of EPYC Milan-X processors overclocked to 4.8 GHz
A combination that offers 128 cores / 256 threads and 1.6 GB of cache!
AMD introduced its 3D V-Cache proper EPYC Milan-X processors last November. This series includes the EPYC 7773X, a 64-core/128-thread that has 768MB of L3 cache. A video blogger from China, Kenaide, is the lead on a pair of these processors, still reserved for a few targeted AMD partners. He was able to test them but also overclock them.
Originally, the EPYC 7773X has a base frequency of 2.2 GHz and a Boost frequency of 3.5 GHz. The technical samples kept by Kenaide are very slightly slower: 2.1 GHz and 3.4 GHz respectively. However, he managed to overclock them to 4.8 GHz. This represents a 41% increase in Boost frequency. As mentioned in the first paragraph, the main set of EPYC Milan-X compared to EPYC Milan is their amount of l3 cache tripled. The 64-core model has 256 MB of L3 cache that can be added to 512 MB from the 3D V-Cache. Add to that 32 MB of L2 cache.
AMD announces 96-core EPYC Genoa processors in 2022, 128-core EPYC Bergamo in 2023
From 280W to 1500W
As you can imagine, this large amount of memory aims to provide optimal performance in demanding applications in this area. Consequently, the pair of EPYC 7773X does not really shine in the tests carried out by Kenaide (Cinebench R23): it is positioned in second position in multi-core, in penultimate place in single-core.
Regarding overclocking, Kenaide installed its processors on a custom motherboard, designed for hyperscale data centers and equipped with an improved voltage regulation module. He increased the power limit to 1500W from 280W via the AMD EPYC overclocking utility and set a voltage of 1.55V. Simple air cooling is enough to keep the processors cool. Clearly, the EPYC 7773X therefore offers good overclocking potential that may interest some companies. Still, in most cases, these chips will end up grouped within supercomputers where considerations relating to consumption and temperatures will take precedence over frequencies.
Source : bilibili Going through TechPowerUp