System Memory Bandwidth Performance

System Memory Bandwidth Performance

As explained - Intel has a couple of certified partners for memory to get some sweet XMP (Xtreme Memory Profiles) 2.0 profiles going. We test memory both at the default SPD/JEDEC 2666 MHz for DDR4 and then with a tweak enabled at 3100 MHz.

Default 2133 MHz 

What you will notice are already very decent dual-channel read and write numbers. 2666 is actually JEDEC standard for the 8700K memory controller. So these are the default SPD timings. You are basically hovering in the 39~40 GB/s range, which is excellent.

The DDR4 memory kit is rated at 2666 MHz. That, my friends, is configured by enabling XMP in the BIOS and that's it. However, Ballistix is offering this memory as a 3000 MHz kit version as well. We suspect it's all the same. For a manual tweak, in the BIOS enable XMP, set Voltage towards 1.35 Volts and then increase the memory frequency until it crashes. For us 3200 Mhz would not run, however, 3100 MHz was totally stable:

Above - a tweaked frequency of 3100 MHz DDR4 - that's easy free bandwidth at the same timings.

Hello, 45K GB/sec ranges. Since the 2666 MHz kit is much cheaper .. give it a go we'd say.