A little research has shown that Asus have some real problems with their Ryzen 5000 bios releases on all the crosshair boards at the moment, it seems like that's what I was fighting against yesterday. There's some major complaints on Asus own forums, HWBot forums and overclock.net forums from lots of users. It definitely seems to be a memory training issue and the users complaining of issues have confirmed that their settings that were stable on the 2206 and earlier bioses now will not even post. Most have had to go down to 3600mhz or even 3200mhz to get them stable, voltage and timing changes are no help.
I find it interesting that I've got no problems at all with the recently released G.skill F4-4000C16D-32GVK kit, yet no end of issues with the older (but still October manufactured, so recently built) G.Skill F4-4000C15D-16GVK kit and the Patriot 4400 C19 kit though. Both those problematic kits are on similar A2 PCBs, though the Patriot kit has the newer capacitor layout. The fact that I can get them stable given enough attempts at retraining by changing timings gives me hope - its a shame I cant tell if the training has worked properly until I get into windows and memtest though.
Even with an older 500 series chipset board and older memory kits that previously worked with Ryzen 3000 it does appear there's still some early adopter issues with Ryzen 5000. There was the odd mention of Strix B550 boards having issues as well in the Crosshair threads I was reading, so it doesn't just seem to be the top end of the Asus range.
I find it interesting that I've got no problems at all with the recently released G.skill F4-4000C16D-32GVK kit, yet no end of issues with the older (but still October manufactured, so recently built) G.Skill F4-4000C15D-16GVK kit and the Patriot 4400 C19 kit though. Both those problematic kits are on similar A2 PCBs, though the Patriot kit has the newer capacitor layout. The fact that I can get them stable given enough attempts at retraining by changing timings gives me hope - its a shame I cant tell if the training has worked properly until I get into windows and memtest though.
Even with an older 500 series chipset board and older memory kits that previously worked with Ryzen 3000 it does appear there's still some early adopter issues with Ryzen 5000. There was the odd mention of Strix B550 boards having issues as well in the Crosshair threads I was reading, so it doesn't just seem to be the top end of the Asus range.