I have GTX 950s, but they're 4GB models - still able to mine ETH on them at 10-11 Mh/s - but 2GB models won't work any more due to the too large size of the ETH DAG file.
They MIGHT still work on ETC though, as I believe the ETC DAG fill is a fair bit smaller.
Might want to try NiceHash on your rig, see what it comes up with to mine.
the gtx 950 was never made into a 4gb model, maybe you have a gtx 960

Hmmm, I'd have to go check then - I just know my 3 are still working on ETH and if they're 2GB they shouldn't be.
I have a pair of 960s AS WELL - I'm not confusing the 2 as all of my 950s are the shortie ITX single-fan model while the 960s are quite a bit longer 2 fan models - the 960s are on NiceHash doing something 'cause they don't mine ETH noticeable better (half a MH or so at most) vs the 960s but they ARE noticeably better at other algorythms.