Intel 5th Gen Xeon Performance Benchmarks With DDR5-4800 vs. DDR5-5600
With the well known HPCG benchmark that is sensitive to changes in CPU cache size/performance and system memory, moving from DDR5-4800 to DDR5-5600 memory increased the performance by around 10% for this memory-intensive HPC benchmark.
For other HPC benchmarks there was a varying degree of impact from the system memory upgrade. Not all HPC codes are memory sensitive and also with the DDR5-5600 memory tested meant the higher latencies. In any event I wanted to put this data out there to help out those considering going from Sapphire Rapids to Emerald Rapids and help justify (or not) also upgrading the DDR5 ECC Registered memory or whether it makes sense investing in DDR5-5600 memory right now compared to the much more common DDR5-4800 server memory.
In a number of the real-world workloads the upgrading from the DDR5-4800 to DDR5-5600 memory was up to a couple percent improvement in the benchmark results... Ultimately it comes down to how much that difference means to you for whether it's worthwhile investing in DDR5-5600 right now.