Mutli GPU FPS Issues

[louij2]

Hi all...

 

I have a 1080ti & a RX 580 in my rig AMD for my Hackintosh but when I am in Windows I want to use my RX580 to play YouTube videos and stream my 3 CCTV cameras on my two seperate monitors and my 1080ti for when I want to play games, however I have noticed that when playing games my FPS is hurt and I am using a 120hz 1440p ultrawide and not hitting 120fps. I have tried settings on low and don't even get 120fps. Could it be my CPU I have a Ryzen 5 1600? I can see in task manager that both GPUs are working.

 

thanks

[KarathKasun]

Windows renders ALL displays on the primary GPU then copies the image to the secondary GPU.  In effect, it just streams the other displays to the RX 580 for display.

 

The last MS OS that actually used multiple GPUs for the desktop was XP.  The change was made because of things like video decoding and GPU accelerated apps being broken between displays.

[Kilrah]

 

19 minutes ago, louij2 said:

I can see in task manager that both GPUs are working.

That's actually the problem, you'll likely want to disable the 580 when gaming.

[louij2]

8 minutes ago, KarathKasun said:

Windows renders ALL displays on the primary GPU then copies the image to the secondary GPU.  In effect, it just streams the other displays to the RX 580 for display.

 

The last MS OS that actually used multiple GPUs for the desktop was XP.  The change was made because of things like video decoding and GPU accelerated apps being broken between displays.

That's crap... makes more sense to render on the GPU that the display is plugged into to me.

[louij2]

8 minutes ago, Kilrah said:

 

That's actually the problem, you'll likely want to disable the 580 when gaming.

How do I watch videos on YouTube then if the GPU my monitors plugged into is disabled?

[KarathKasun]

1 hour ago, louij2 said:

That's crap... makes more sense to render on the GPU that the display is plugged into to me.

Things like accelerated video decode would result in black or green areas instead of video content being displayed when moving from one GPU to the other.  Web browsers at this point would also not work either, because they are so heavily GPU accelerated.

[Kilrah]

10 hours ago, louij2 said:

How do I watch videos on YouTube then if the GPU my monitors plugged into is disabled?

Do you watch videos WHILE playing?

[louij2]

Okay so just checked temps cos last time I checked they where like 40c but now i'm getting over 100 when I overclock so I think I need new thermal paste same stuff since I got the CPU

[EvadeChillzzYT]

This is a little bit on the pricey side but you could try to buy a new gpu and replace the 580. (i don't know the most about tech but it could work)

[louij2]

Okay so I might have sorted my issue a bit. Ram was not set to 3200mhz, uneven mounting pressure on cpu caused high temps randomly and overclocked to 3.8ghz gonna give that a go then tighten up timings etc