[Success] HIS AMD Radeon R9 380X - Resolution Issues

[dronefriend]

Does the 380X provide full acceleration in OpenCL under El Capitan?

 

[davelaw56]

 

[davelaw56]

Yes it works just fine that way for day to day use...The only strange thing though is when I play a game like Age of empires 3 the game freezes... I wanted to see if IGPU was doing the same and no... so you basically can play a game with a multiple screen set up on your IGPU but When you try to play it on the R9 380X the game freezes after 5 minutes of play time. when I say play on your IGPU I mean you go to System preferences/Monitors and you change the white bar over the monitor to the one that corresponds to your IGPU.

When you play on PCI-E and you say you want to change resolution to whatever you want the screen goes black and a tiny part of the game goes on the IGPU screen. it is like there is a confusion between IGPU and PCI-E. Then you have to force quit the game and start it again but still... it will crash after 5 minutes of play time. So in conclusion, for day to day normal use it will do just fine but I haven't found a solution yet for that problem...

Update it seams that using only the HDMI port on the PCIE card is resolving the problem in combination of DVI on the motherboard for IGPU

I am not using any frame buffer I suspect that is the reason...

 

[dronefriend]

View attachment 202936

Could not have hoped for a more detailed response. Many thanks!

In the end I chose a Asus R9 380X Strix OC over the future Sapphire Nitro RX 480. Seems I won't be disappointed - the difference in OpenCL score is about 10% from 480's score in Sierra DP2, but the price difference is around 25%.

It will do great.

 

[davelaw56]

It seams that 10.11.6 update is resolving the issue with some games as long as I dont use Vsync... Will do some more tests

 

[dronefriend]

I'm playing Witcher 2 using my 380X card without any issues. Only 1 monitor plugged into the computer though. Played first with vsync, then vsync off. On 10.11.5. Just FYI, maybe there is something else other than the card?

Using radeon framebuffer and no patches.

 

[nguyetan13]

@Fl0r!an Thank you for your suggestions. I tried them and it is working, mostly...

So, I removed the Inject ATI. I went into my BIOS and set my Integrated Graphics as my primary GPU. So IGP instead of PEG.

Then, with only my HDMI cable plugged into my 380x, I rebooted the system. After about 1 minute of nothing, bam, I saw the OS X login screen. Once i logged in, I could see the graphics looked great and sure enough, my system reported my R9 xxx series card.

So, I now have this one last issue, and honestly, if this is something that can't be rectified, it is fine. But, with the current setup, I cannot see the BIOS or clover boot screens. When I power on my system, it is just black until OS X loads. However, if I plug an HDMI cable into my IGP on my MB, I can see the boot screens.

So this basically means, that if I want to boot into windows, or my BIOS, I would need to plug an HDMI cable into my IGP to choose these options. Again, not the end of the world, but wonder if you have any ideas?

Thanks for all the help.

Hi I had the same issue, but found a work around that might help you.

I plugged a VGA cable from the igpu slot into the monitor to boot up, and set my monitor to detect VGA. You'll be able to see the BIOS and the bootloader (handy cause i dual boot), and as it loads OSX it goes blank. That's because it has switched to the pcie graphics where my monitor is also connected via HDMI, and everything is working. Good thing is that it only detects a single monitor which is the 380x.
The only inconvenience is that I have to switch to HDMI signal manually on my monitor while boot up.

Hope this helps.

My details:
i3 - 6100
Asrock H170m Pro4
R9 380x G1 Gaming
Samsung s24c750 monitor