Dell Poweredge G14 and HPE Proliant G10 are the current generation servers in production supporting Intel Xeon Scalable processors, which offer up to 28 cores and 56 threads per processor, achieving 112 cores and 224 threads total with four processors.
Dell Poweredge G13 and HPE Proliant G19 are the previous generation servers that were primarily in production from 2015 to 2018 support Intel Xeon E5 v3 and E5 v4 processors. Intel Xeon E5 v3 processors offer up to 18 cores and 36 threads per processor, achieving 72 cores and 144 threads total with four processors. Intel Xeon E5 v4 processors offer up to 22 cores and 44 threads per processor, achieving 88 cores and 176 threads total with four processors.
If you prefer new condition and the latest technology, the current generation servers in production support the Intel Xeon Gold 6238R. It is part of the 2nd Gen Refresh release by Intel in early 2020. It is reasonably priced for the performance. It offers 28 cores, 2.2GHz base frequency, 4.0GHz turbo frequency, and 38.5MB cache.
If you are looking for the best bang for your buck, the previous generation servers support the Intel Xeon E5 v3 processors, which have dramatically dropped in price. We recommend the Intel Xeon E5-2699v3 offering 18 cores, 2.3GHz base frequency, 3.6GHz turbo frequency, and 45MB cache.