Should be enough, the GTX 650 TI needs around 400 watt (overestimation) but actually needs 20 amps on a single 12v rail. The 380 has 2 12v rails, one with 17 and the other with 15 which is more than enough.
Should be enough, the GTX 650 TI needs around 400 watt (overestimation) but actually needs 20 amps on a single 12v rail. The 380 has 2 12v rails, one with 17 and the other with 15 which is more than enough.