Doesn't work on AMD Ryzen 4800H

[skipster1337]

I installed the patch on 98SE in VirtualBox 7.0.8 and when opening folders Explorer will crash at random but very often, reporting a SHELL32.dll error:

Game installers also crash, it takes several tries to install something successfully:

I enabled the TSC patch however it didn't seem to do anything.
Similar behavior occurs in VMware Workstation 16.

[JHRobotics]

Hello @skipster1337,

I’m not sure this is CPU issue – I didn’t personally test 4800H but 4700U and it works OK (and this looks like very simitar CPU).

How many RAM/VRAM and CPUs did you assign to VM? (Maximum is 512 MB RAM / 128 video RAM and only 1 CPU).

[skipster1337]

I am using 512MB of ram, 128MB of video ram and 1 cpu as the guide says. Not sure what's the issue here.

[Kurt-Aust]

Looking at the differences between the working 4700U and the unstable 4800H, the only notable difference is that the 4800H has SMT (AMD's version of Hyper-Threading).

It may be worthwhile turning off SimultaneousMultiThreading in BIOS to see if that fixes the issue, not an ideal long-term solution but at least it would confirm what is causing the problem.

[Bruxism]

Looking at the differences between the working 4700U and the unstable 4800H, the only notable difference is that the 4800H has SMT (AMD's version of Hyper-Threading).

It may be worthwhile turning off SimultaneousMultiThreading in BIOS to see if that fixes the issue, not an ideal long-term solution but at least it would confirm what is causing the problem.

Thanks to this post, I was able to get Win95 to boot on AMD Ryzen 5 7600 with SMT off.