It won't be unplayable, you just won't be playing on ultra. Here's a random newer review that includes a 760 although the 2gb version. Plenty of game benchmarks and they are all maxed settings unless specified. Looks like a lot of the games sit around 25fps at 1440p so expect to play on med-high with decent fps. That is far from unplayable.
https://www.techpowerup.com/reviews/Gigabyte/GTX_950_Xtreme_Gaming/10.html