AMD EPYC 4585PX & EPYC 4565P With DDR5-4800 vs. DDR5-5600 Performance

One of the many advantages with the newly announced EPYC 4005 series for entry-level servers is support for DDR5-5600 ECC memory compared to the current Xeon 6300 series being limited to DDR5-4800 memory. With the launch-day EPYC 4005 "Grado" benchmarks earlier this month of the AMD EPYC 4585PX and EPYC 4565P I was running with DDR5-5600 ECC memory modules. But for those wondering about the performance when using DDR5-4800 comparable to the Xeon 6300 / Xeon E-2400 series, here are some comparison benchmarks for reference.

For those wondering about the performance benefits of going for DDR5-5600 over DDR5-4800 memory for these budget server processors, this round of testing is for you. The intent is to help shed some light on where the performance advantages of DDR5-5600 are worthwhile, how the EPYC 4005P performance compares to the Xeon 6369P flagship CPU at the same memory speed, and just the overall performance of the EPYC 4005P series on DDR5-4800.

It's very easy to source DDR5-4800 ECC UDIMM memory modules with a variety of memory kits available at different Internet retailers. It's also fairly easy to source DDR5-5600 ECC UDIMMs but not quite as robust selection and for some memory kits more expensive than DDR5-4800 ECC UDIMMs. So for those leaning toward the AMD EPYC 4005 processors for an affordable SOHO server or other budget-minded server/edge computing deployments, with these benchmark numbers for reference it may make sense depending upon the workload to opt for the DDR5-4800 modules to lower costs. Or if you are looking to "recycle" some older DDR5-4800 UDIMMs you may have from existing servers.

The DDR5-5600 ECC UDIMMs used were 2 x 32GB Kingston 9965794-022.A00G KSM56E46BD8KM-32HA CL46 ECC UDIMMs that I bought last year for $119 USD per 32GB module but with current pricing is listed on Amazon.com (affiliate link) at $177 USD per 32GB DIMM. Meanwhile the 2 x 32GB DDR5-4800 ECC UDIMMs used for testing based on what I had available were the Micron MTC20C2085S1EC48BA1 BC 32GB DIMMs. Depending on Internet retailer these are in the $160~190 range so for these modules the pricing is close to the going rate for the DDR5-5600 Kingston 9965794-022.A00G KSM56E46BD8KM-32HA modules.

For putting the DDR5-4800 vs. DDR5-5600 ECC UDIMM performance into perspective for the 16-core AMD EPYC 4005P processors the following configurations were tested to quantify the difference:

EPYC 4564P @ DDR5-5200 (maximum speed for EPYC 4004 series)
EPYC 4584PX @ DDR5-5200 (maximum speed for EPYC 4004 series)
EPYC 4565P @ DDR5-4800
EPYC 4565P @ DDR5-5600
EPYC 4585PX @ DDR5-4800
EPYC 4585PX @ DDR5-5600
Xeon 6369P @ DDR5-4800 (maximum speed for current Xeon E-2400 / Xeon 6300 CPUs)

Thus a nice look at how DDR5-4800 vs. DDR5-5600 compares for the new EPYC Grado processors. These build off the launch-day review results I shared earlier this month. All of the testing was done on Ubuntu 25.04 while using the Supermicro AS-3015A-I H13SAE-MF server platform.