2nd GPU not working correctly

[Daniel H B]

Hi, I recently uncovered a GTX 560ti from an old box in my house and have decided to try and use it as a video encoder for OBS alongside my Titan X (Maxwell), i don't really mind if i dont get a performance increase, it just looks pretty cool to use 2 gpus inone system.

So to the problem, 
I plugged in the card and tried to update the drivers using device manager, thaqt worked correctly but it uninstalled the drivers for my Titan, I then tried to get drivers from NVIDIA directly but that didn't work either (the drivers on the opposite card were uninstalled), just wondered if anyone had a fix to this, because when recording games like Metro Exodus in receive a significant performance decrease.

My Specs
Asrock B450M
Gtx Titan X Maxwell

Gtx 560ti

Ryzen 5 3600x@4.3ghz

RM 750w psu
16gb g.skill ram

Arctic 240mm Cooler