450w on R9 380/R9 280x

Alctrazz

Commendable
Aug 3, 2016
4
0
1,510
Hello, I really need some help. I have some budget for gpu R9 380 (2nd) or R9 280x toxic (new promo). I know this question asked many times but I need some comfirmation. Does Psu with 450w 85% efficient is enough? If not enough what risk I would be facing. It is only low performance from gpu or I will facing some physical damage?

I dont mind some low performances as I only use the psu temporary about 1-2 month. My rig:
i5-3470
4Gb 1600mhz
ecs h61-m17
ssd 120gb, 2 HDD


 

Alctrazz

Commendable
Aug 3, 2016
4
0
1,510


My apologies by saying this but I accidentally choose you as the best answer. lol It is a good answer and I need more especially someone that have used 450w with this type of gpus. I have a low quality Corsair VS450 (Have 2x8pin). I can underclock the gpu to reduce the wattage right?