Error adding gtx 970 to rig with 4 1070 ti's (showing as a 5th 1070?)

I have a rig with 4 1070 ti’s, mining using grin-miner on ubuntu.

I’m trying to add a gtx 970, but it is showing it as a 5th 1070 ti for some reason, and shows Status “Errored” as shown in image:

Any ideas?

Solved. gtx 970 only has 4gb of ram