Performance - System Memory Perf: DDR4 Memory Read / Write

Performance System Memory: Memory Read Test

Ryzen B350/X370 motherboards support high-frequency memory up-to roughly 3200 MHz with exceptions here and there. This will differ per motherboard manufacturer, but again you can expect support up-to 3200 MHz (dual-channel) and some even a notch higher. We highly recommend you to check what memory is supported with specific motherboards.  

• Higher frequencies are only supported with two DIMMs. 
• If you use four DIMMs then at this moment you are looking at a maximum of 2400 MHz.

High frequency memory is working really well for Ryzen - if you want to go for high-frequency DDR4 memory, you are best invested with two 8 or 16 GB DIMMs. We recommend (2 DIMM x 8 GB) 16 GB these days for a nice amount of memory in any high-end gaming OC. Check the qualified vendor list and the supported modules at the manufacturer webpage! 
 

 
Memory frequency support can be a very tricky thing on Ryzen (at this time). Our Ryzen 5 1400 processor with respective motherboard worked with a 3200 MHz kit at 2933 MHz, you need a bit of luck really. The thesis is that 2933 MHz however should work on most setups and more and more kits get supported with new firmware updates.

We are using a beta BIOS with AGESA 1006 update. For this Corsair memory used we could simply hit the XMP profile after the system booted into 2933 MHz CAS16.
 

Keep in mind that the higher Core i7 59x0 and 69x0 series are quad-channel aside from the Core i7 7700. Overall Ryzen's single rank dual-channel performance itself is spot on, and performs as expected. The memory latency however remains a topic of discussion. Check the manually collected QVL list for compatible memory here from reddit user Wiidesire, Samsung B die chips seem to offer the best compatibility (single rank is two DIMMs and dual rank would be using four DIMMs).