Asrock Killer SLI Corsair RAM boot issues

coops1

Honorable
Jul 3, 2013
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Hi,

I've been using the X370 Killer SLI (not the A/C model) for a couple of months now but am struggling to get my memory running smoothly at any speed.

I'm using:

Ryzen 5 2600 (stock)
Bios 4.8
Corsair 3000mhz C15 (CMK16GX4M2B3000C15 v5.39)

The problem I'm having is that the PC will always boot twice from a cold boot (and occasionally on restart) which is, I assume, due to AMD boot training on my RAM. I've tried leaving everything set to auto, which sets the RAM to 2133mhz, I've tried running it on XMP 2666, 2933 and 3000 and I've tried manually dialling in 2133mhz with looser timings 16-18-18-38 at 1.35v with a bump of SOC voltage to 1.1v.

Whatever settings I use, the PC is stable once I'm into the OS, but will always boot twice. I've read that the issue can be down to boot voltage being set to 1.2v, rather than 1.35v, but my RAM runs at 2133 @ 1.2v without issue, so can't see that being the problem.

Anyone have any similar issues / solutions?

Thanks

Sam
 
DDR4 XMP profiles usually specify 1.35V, and running at higher than base memory speeds (2133 in your case,) should be done with the correct voltage.

I have had plenty of issues with Ryzen and memory, but of course, I opted for memory kits not on the QVL for my motherboards, and both kits are high capacity dual-rank. The higher speed kit (3000 MT/s) will refuse to boot if using an XMP profile, but boots fine with correct voltage and manually set timings, whereas after the latest AGESA update to 1.0.0.4, the other kit (2400 MT/s) runs just fine using just the XMP profile. Either way, I'm satisfied, as I never expected dual-rank modules to run reliably at 3000 MT/s.

The system running the XMP profile boots fine each time. The system running the manually set modules will fail boot once in a while, or will retry on it's own and choose the default 2133 speeds, then boot fine. A reboot is usually all that's required to get back up to speed.

Not sure there's a good solution to the memory issues with Ryzen except find settings you can live with and that work reliably with the system. When not benchmarking or playing games, whether you run 2133 or over 3000 MT/s hardly makes much difference in productivity.