recently I got myself a new rig:

ASRock X370 Fatal1ty Professional Gaming
AMD Ryzen 7 1800X
ASRock RX Vega 56 8 GB
16 GB G.Skill X-Flare

There's one problem though. I can't get the RAM to work at 3200MHz. Whenever I try to set it beyond 2800, the PC won't start and instead boots for 3-4 times in a row, resetting RAM speed.

How can I make sure the RAM stays at 3200 MHz?

Kind regards

1st - update to latest BIOS. Sometimes ASRock's beta versions are better than the mainstream ones...

2nd - make a total CMOS reset.

3rd - check all the cabling and components. Better re-seat everything. Make sure the 2 sticks of RAM are in the correct slots (check with manual for more info).

4th - open UEFI and set ONLY the XMP profile. Save and reboot.

Report back after all this. I'm yet to see a Flare-X kit under-perform, even on an ASRock. Basically, these kits are the ones to have if you want fast RAM for Ryzens.

hi xhue,

I did upgrade my BIOS to 4.80 and did reset the board afterwards.
I placed the sticks at slots number 2 and 4 from the cpu socket.
I did not change any settings at BIOS at all, except for AMD-V for VMWare.

Sadly, the system still won't start with the XMP profile

assuming the ram works perfectly it should be the cpu that can't handle it try push the soc to 1.1v

Hi gizmic,

the G.Skill RAM is a cl 14 kit.

I pushed the soc to 1.1. Afterwards, the system restarted and the RAM where indeed clocked at 3200mhz.
However I got stuck at boot whenever I restart my pc. After three or so unsuccessful boots, the system starts with the ram at 2400mhz again. When I get in the BIOS menu after the many failed boots, I can set the RAM speed at 3200mhz again and the system will start with the set clock.

This is extremely annoying. Not only forces it me to manually set RAM speeds at every startup, it also increases boot time.

you can also set the soc back to auto and try the ram voltages at 1.40 and see how it goes its just strangely you cant run xmp but those how the computer lottery works 

This is quite easy now.

https://www.overclock.net/forum/13-amd-general/1640919-ryzen-dram-calculator-1-1-0-beta-2-overclocking-dram-am4-333.html" rel="nofollow - https://www.overclock.net/forum/13-amd-general/1640919-ryzen-dram-calculator-1-1-0-beta-2-overclocking-dram-am4-333.html

It should be said that even the safe timings aren't guaranteed to be stable, so this might not help at all.

There's no guaranteed way to make sure, as your CPU might have a weak memory controller that prevents getting the most out of your RAM. Have you overclocked you CPU or are you running it at stock settings? If you haven't touched the CPU settings, I would try setting the voltage manually to something like 1.3V to see if that would help stabilize the whole thing.

The RAM may be able to do 3200MHz, the CPU may not. Remember that the stock RAM speed for Ryzen 1xxx CPUs is 2667MHz and anything over that is an overclock situation for the CPU memory controller (although strictly speaking enabling the XMP profile is an overclock for the RAM as well, even if it's supposed to be able to handle the XMP speed). In any case, it's really a lottery that involves the CPU, the motherboard and the sticks themselves. Sometimes they just don't care for each other, sometimes they work together like a charm. Now, since you saw some progress changing the SOC voltage, you might be able to push at least beyond 2800 MHz by tweaking the voltages. My suggestion is to set SOC voltage back to auto and RAM voltage to 1.4V (just like gizmic said), then increase the RAM speed to 2933 MHz. If that works, increase the speed to 3000 MHz and check if that's stable. If not, set the SOC voltage to 1.1 V and see if that stabilizes the memory. Also, I'd still try setting the CPU voltage manually. The voltages can be all over the place with the auto setting, which may make matters worse, even if it doesn't directly affect the RAM or the IMC.