eTeknix published a review on the AMD EPYC 7551P 32-Core/64-Thread SP3 Processor
A quote from the article:
The EPYC specifications aren’t a secret, so let us start with those. As mentioned above, you get 32 CPU cores and 64 Threads in the AMD EPYC 7551P. The base clock is 2 GHz with a max core boost of 3 GHz. If all cores are boosted, then 2.55 GHz is the maximum limit.AMD EPYC 7551P 32-Core/64-Thread SP3 Processor Review
The P at the end of the product name identifies that it is a processor for a socket count of 1. As with all EPYC processors, you get 128 PCIe lanes. What’s more to mention? Well, you get 64MB L3 cache within the 180W TDP package.
The processor is a SoC design, eliminating the need for a southbridge or other type of chipset. That reduces the distance information has to travel which is a great thing on any day. You also get support for 8 (eight) channel memory with a speed of 2666MHz and a bandwidth of 341 GB/s; up to 2TB.