significant performance impact over mining on AMD B350 (AM4) with latest bios

[Mel Spektor]

since the may bios update (or probably 1 or 2 updates ago), using a Gaming AB350 gaming mobo (gigabyte brand), I'am getting 45 h/s on monero with xmr-stak (per core) when I normally get 60 h/s that's a huge step down. I know it is the bios because I downgraded and inmediately the performance when back to normal. Is AMD also crippling hardware like Intel?? geez.

[Mel Spektor]

Gigabyte has enabled pci 4.0 support for current motherboards (1). Asus have not. Maybe that is the reason, gigabyte wanted to make pci 4.0 stable.

My system is 0.5 fps or 600 points slower than in January in the Superposition 4K benchmark. I have no interested to dig what is the cause.

xfce@ryzenpc:~/Downloads/Unigine_Superposition-1.0$ inxi -bM
System:
Host: ryzenpc Kernel: 5.1.0-rc5+ x86_64 bits: 64 Desktop: Xfce 4.13.2
Distro: Debian GNU/Linux 10 (buster)
Machine:
Type: Desktop Mobo: ASUSTeK model: PRIME B350M-K v: Rev X.0x
serial: <root required> UEFI [Legacy]: American Megatrends v: 4801
date: 04/25/2019
CPU:
6-Core: AMD Ryzen 5 1600 type: MT MCP speed: 3199 MHz
Graphics:
Device-1: AMD Ellesmere [Radeon RX 470/480/570/570X/580/580X/590]
driver: amdgpu v: kernel
Display: x11 server: X.Org 1.20.4 driver: amdgpu
resolution: 3840x2160~60Hz
OpenGL:
renderer: Radeon RX 570 Series (POLARIS10 DRM 3.32.0 5.1.0-rc5+ LLVM 9.0.0)
v: 4.5 Mesa 19.2.0-devel - padoka PPA

1)
https://www.tomshardware.com/news/gi...470,39377.html

as I understand....the problem is agesa code 0.0.7.2 which brings support for Zen 2 but it's giving issues with 1st gen Ryzens. So if you are using first gen Ryzen don't update to agesa 0.0.7.2.

I'm talking of a more serious issue, total performance of the cpu with xmr-stak is 225 hashes per second when it should be 400 h/s. So almost half the performance.

but now that you mention it my system also had some performance drops with the gpu, I'm going to try older bioses to confirm.