- Joined
- Jun 20, 2019
- Messages
- 127
- Motherboard
- Asus Z390-i
- CPU
- i7-8700K
- Graphics
- RX580
- Mac
- Mobile Phone
I have an ASUS Z390and an i7-8700K. I'm using iMac 19,1 in SMBIOS (speed step is fine from 1.6 to 5ghz) and Clover.
I jumped from Catalina 10.15.1 to 10.15.3
I force ATI DGPU use with "defaults write com.apple.AppleGVA gvaForceAMDKE -boolean yes" and "defaults write com.apple.AppleGVA gvaForceAMDHEVCDecode -boolean yes"
I checked using console Log + monitor + intel's gadget
I tested using FCPX and handbrake: H264 encoding and decoding are using AMD GPU only
For HEVC encoding FCPX is using both Intel IGPU + AMD DGPU
Everything is not better as when I try to read H265 10 bits 4K 60 FPS content (like SAMSUNG demo) with players (like Elmedia) it is random :
sometimes the AMD GPU + CPU is used and it is stuttered as CPU it is closed to 100%
sometimes AMD GPU only is used (CPU remains to 90% idle) -> perfect playing
with VLC screen remains black (!)
with IINA CPU is always used
I didn't test iMac Pro value in SMBIOS, do you think it worth it ? I read in this post someone has had better results with ImcPro1,1 value, I didn't understand why as IGPU is supposed to be very fast (but not the best in quality)
So far both H264/H265 is working with imac19,1 in SMBIOS in Catalina 10.5.3, no need of dummy kext
I jumped from Catalina 10.15.1 to 10.15.3
I force ATI DGPU use with "defaults write com.apple.AppleGVA gvaForceAMDKE -boolean yes" and "defaults write com.apple.AppleGVA gvaForceAMDHEVCDecode -boolean yes"
I checked using console Log + monitor + intel's gadget
I tested using FCPX and handbrake: H264 encoding and decoding are using AMD GPU only
For HEVC encoding FCPX is using both Intel IGPU + AMD DGPU
Everything is not better as when I try to read H265 10 bits 4K 60 FPS content (like SAMSUNG demo) with players (like Elmedia) it is random :
sometimes the AMD GPU + CPU is used and it is stuttered as CPU it is closed to 100%
sometimes AMD GPU only is used (CPU remains to 90% idle) -> perfect playing
with VLC screen remains black (!)
with IINA CPU is always used
I didn't test iMac Pro value in SMBIOS, do you think it worth it ? I read in this post someone has had better results with ImcPro1,1 value, I didn't understand why as IGPU is supposed to be very fast (but not the best in quality)
So far both H264/H265 is working with imac19,1 in SMBIOS in Catalina 10.5.3, no need of dummy kext