Is the EPYC 8434P good for virtualization?

Yes. 48 cores, 96 threads and 256MB of L3 cache let one host run many virtual machines with room for cache-heavy workloads. Eight memory channels keep bandwidth high across those VMs.

How does it compare with the 64-core EPYC parts?

The 64-core single-socket chips give more cores and threads but draw more power and need more cooling. The 8434P trades some peak core count for lower power and a simpler platform.

Does it need DDR5 memory?

No. It supports DDR4-3200 across eight channels. That makes it a fit for DDR4 server platforms rather than the newer DDR5 generation.

What socket and motherboard does it use?

It uses the SP3 socket and needs a compatible single-socket server board. The board, memory and cooling are bought separately from the processor.

The processor itself. Server boards, memory, cooling and chassis are not included.

Is it worth it over a 32-core EPYC?

If your workloads are core- and cache-hungry, the extra cores and 256MB cache pay off in consolidation density. For light or small deployments, a 32-core part is simpler and easier to cool.