Minecraft on Hyper-V

The Intel Xeon E5-2620 v4 (8 cores, 16 threads) is significantly better than the E5-2430 v2 (6 cores, 12 threads), offering roughly 35% higher multi-threaded performance and 16% faster single-thread speeds. The v4 is newer (Broadwell vs. Ivy Bridge), supports faster DDR4 memory, and is more power-efficient.

Performance and Specifications
Cores/Threads: The E5-2620 v4 has 8 cores/16 threads, while the E5-2430 v2 has 6 cores/12 threads.
Speed: The E5-2620 v4 features a 2.1GHz base, 3GHz turbo, while the E5-2430 v2 has a 2.5GHz base, 2.7GHz turbo, but the v4’s architectural advantages make it faster overall.
Memory: The E5-2620 v4 supports 4 channels of DDR4, while the E5-2430 v2 supports 3 channels of older DDR3.
Efficiency: The E5-2620 v4 runs on a lower 85W TDP compared to the 95W TDP of the E5-2430 v2.

Conclusion
For any new build or upgrade, the Xeon E5-2620 v4 is superior due to higher core counts, faster IPC (instructions per clock), and modern DDR4 memory support. The E5-2430 v2 is only relevant if replacing a chip in an existing FCLGA1356 motherboard.