DDR4 Memory Scaling & DDR4-3600 Testing With AMD Threadripper On Linux

[Apopas]

Is it still valid that Ryzen processors can not boot if all RAM slots are filled?

[Anty]

Wut? Where did you got this info from? Of course they can.

[pal666]

ryzen processors are memory starved due to infinity fabric. no surprises here

if they are starved due to infinity fabric then faster memory isn't going to help

[linuxgeex]

if they are starved due to infinity fabric then faster memory isn't going to help

Higher memory clock lowers the infinity fabric overhead. That's been proven on various review sites. For Ryzen the faster the memory clock the lower the NUMA performance impact. For Intel where the ring bus operates on its own internal clock improving the speed of the RAM clock doesn't help with NUMA performance... but the ring bus is still faster than Infinity Fabric, even with the fastest modules money can buy for Ryzen, and this is why some of the HPC benchmarks that are memory-starved due to NUMA timings are more than twice as fast on Xeon. Faster memory does help here.