I am now 85% sure something on your motherboard is not actually set at default.
Load optimized default. Enable svm and iommu. Nothing else! Try that. Then reboot and enable only xmp. Nothing else.
With no GPU passthrough, are you using the correct accelerated driver on the host under x? E.g. Nvidia proprietary? Nouveau is going to be… not good for the spice bits.
Your performance issues could be combo of weird Asus behavior with any amd non stock settings plus a crap driver on the host.
Not afaik but my experiences with Asus boards have been mixed for TR hence my reluctance to recommend them. I mention the issues in reviews but the oc stability has been less for me on Asus than anything. Even relatively weaksauce ocs.
I dont use the nvidia gpus (i blacklisted every nvidia driver too). I want to passthrough this two cards into two different VMs:
(here i had a problem to passthrough the gpus because of the identical id. And the solution was so easy for my specific problem because i use 3 gpus. Simply blacklist the nvidia driver and it is to passthrough the nvidia cards without iommu or anything (i dont know why.)
I have three Cards built in like you can see. 2x ASUS Strix 1080ti’s and a AMD Radeon Pro wx3100.
Short translation: with nouveau or the proprietary driver was the overall performance great under linux (manjaro), until i resize a window, then it lags. And the only solution i found (from end 2018) was to disable something in kde/kwin for rendering resizing. Everything else (like games) runs super nice.
But it was not good enough for me. So i buyed the amd card and use the free, in kernel built-in driver. Its runs so smooth! Very happy with it.
But now, i try it again with the bios reset again.
Ok, so host is using amdgpu and it’s accelerated properly? E.g. multiple videos, full screen videos, etc play without tearing? If so the symptoms here fit most perfectly with what I encountered from Asus on the rog z e late last year with @Dygear system I helped him build
You might also set pcie_aspm=off on your kernel boot line. I just checked my notes and that was necessary for me as well with a similar setup.
Installation complete. in 11 minutes (last post i say i start new win10 installation). Completly! Everything runs so smooth like with virtualbox or vmware!
I really spent a lot of time on it before I had to give dygear his motherboard. Pcie is negatively impacted even by xmp in some cases. The Asus presets in uefi wreck pcie performance tho. Sometimes. Even just nvme perf.
So glad it’s fixed. If you enable xmp only enable xmp but 2933 may be faster than 3200. I would not push past 3200 on 1st Gen TR.
2666 may actually be the sweet spot.
Only once memory speed is dialed in then you can fiddle with multiplier and voltage. 3.9ghz all core around 1.35-1.4v while not gimping speed.
My RAM can only go 2666 because my mainboard is full of ram. All 8 Dimms are in with total of 64gb RAM DDR4 Dominator Platinum from Corsair. They have a 2800mhz profil in it, but once i set it to 2800mhz, the pc dont boot anymore and after a few tries it say the memory setting is faulty. In the manual from the mainboard i read somewhere that the mainboard support only 2666mhz if full stacked.