Core reduced by 35%
AMD has revealed new details about the Epyc Bergamo processors , which were introduced a couple of days ago. More specifically, AMD talked about the features of the Zen 4c cores that make up the new CPUs.
The Zen 4c core takes up 35% less space on a chip than a regular Zen 4: 2.48 mm 2 versus 3.84 mm 2 . At the same time, contrary to rumors, the technical process remained the same: 5 nm. In fact, Zen 4c differs from Zen 4 only in half the amount of L3 cache. Thus, AMD managed to make the core one third smaller with virtually no changes.
Intel has nothing of the sort.
This, in turn, allowed AMD to create CCD chiplets with 16 cores each for the first time – and all 128 cores of the top Bergamo fit in eight chiplets, while the 96-core Genoa needed 12 chiplets.
One CCD chiplet with 16 cores in the case of Bergamo offers an area of 72.7 mm 2 , while one Genoa chiplet with 8 cores offers 66.3 mm 2 .
Since the Zen 4c cores have the same architecture as the regular Zen 4, differing only in the amount of L3 cache, in a number of tasks, as we saw yesterday, Bergamo is much faster than Genoa, not to mention Intel Sapphire Rapids, which have a maximum of 60 nuclei.
Next year, Intel will release Sierra Forest processors that will have up to 144 small cores, which is even more than Bergamo, but the problem is that these are small cores on a different architecture, which, among other things, do not support multithreading.
