Sorry, a couple slight mistakes. That table and document are for Broadwell-EP (E5-2600 v4). And the table shows performance impact of actually setting the memory interleaving to 1-way within the BIOS, while actually populating 1 DPC (8 dimms).
Here is the information for Haswell-EP (E5-2600 v3)...
Fujitsu has some excellent documentation for their Primergy servers that is generally applicable to all systems using the same chipset and CPU architecture.
The following table shows the relative performance of using less than 1 DPC (DIMM per Channel) which is the 'minimum' 4-way configuration...
Thanks for the info on y-cruncher, I had not used it before. Here are the results I got on my similar system:
Z10PE-D16 WS
2x Xeon E5-2689 v4
128GB(8x16GB) DDR4 2133MHz
2x Geforce 1070 GTX
These benchmarks were performed with a bclk of 103.5, NUMA mode memory(4 nodes), Cluster-on-Die QPI, and...
The CSM allows for booting in legacy BIOS mode. Without it, the board will only boot into UEFI mode, but you'll need to make sure all your drives are GPT formatted and that your PCI-E cards all have UEFI firmware.
I find that leaving the CSM enabled and booting only the storage and non-video PCI...
I actually own both the Z10PE-D8 WS and Z10PE-D16 WS, so I can break down the differences for you.
The following assumes that both CPU sockets are used. Do not get either of these boards if you are only going to socket a single CPU.
PCI-E 3.0 x16 slots:
D8 has 7 slots: Odd numbered slots all...
The E5-2600 series CPUs are all designed to run quad-channel memory(each). Most of the time they will function in dual-channel mode, but their performance will suffer greatly in this state. Memory related errors are exagerated in a dual CPU configuration, which is likely the issue you're facing...
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