Question Last Radeon driver to support Dual Graphics (APU + GPU crossfire)

[ImperialGuardsman]

Everyone,


To start, I recognize this technology is old and there are better things out there. That said, I had parts set aside specifically to build a Dual Graphics machine with an AMD A10-7890k APU and an R7 250 GPU ages ago and am only now building it. Consider it an out of date exploration.

My question: what is the most recent driver (Windows 10 64 bit) that supports Dual Graphics (sometimes called hybrid Crossfire)?

Background: I am confident that the last version of Catalyst Control Center will most likely work, but I want to be as up to date as possible. Googling does not bring up a lot of good answers, and my emails to AMD were less than stellar. I am not sure if normal Crossfire was phased out at the same time or not.

Thank you very much!

 

[stonecarver]

I haven't read the release notes for any of these drivers but maybe somewhere for you to start.

https://www.amd.com/en/support/down...5/radeon-r7-200-series/amd-radeon-r7-250.html

Also keep in mind If there was not a crossfire driver made for Windows 10 you could always use a windows 7 64bit driver under compatibility mode in Windows 10.

 

[beyondlogic]

it should be possible to crossfire it

but because its not much of a option it can be janky.

someone got it working on a laptop.

https://community.amd.com/t5/pc-dri...r-with-adrenalin-and/m-p/45860/highlight/true

 

[ImperialGuardsman]

I wanted to share an update with everyone. I tried the last version of each "flavor" of the Radeon driver, from Adrenaline 2019 back to Catalyst and nothing worked. Bios was set to Dual Graphics and I played with where the cable went (gpu or motherboard) and the vram (auto or 2gb). I suspect that the MSI R7 250 2gb OC might be a little different from a normal R7 250. Oh well. I may experiment again with a more basic card and will update if I find anything.

 

[ImperialGuardsman]

A little update for everyone and especially future retro PC enthusiast who may run into this issue: there are two versions of the R7 250. The one based on codename Oland with 384 shaders, and one based on Cape Verde with 512. Based on my research, only the Oland designs will work in dual graphics. How you were supposed to know which is which even back in the day is beyond me. I have tried two cards which turned out to be Cape Verde (confirmed with GPU Z):

MSI 2GD3 OC (2 gigs of GDDR3)
ASUS 2GD5 (2 gigs GDDR5)

I have an R7 240 on the way to test (to my knowledge, any should work) and a different 250 from ASUS with only 1 gig of GDDR5. It also has a VGA out, which may be a good sign. I will update the thread with the driver version that works, assuming I get this arrangement to work.

I know this type thing is irrelevant and outdated to most people, and in many ways it is, but I know there are many PC enthusiasts out there who really appreciate more "vintage" hardware.