GTX 770 ACX SC 4GB Max clock 1228?

Phaseonedsm

Honorable
Oct 15, 2013
21
1
10,520
i've been trying to overclock this card and all i can do is get to a actual clock of 1228mhz anything over that and it crashes. This doesn't seem right it doesn't even go above 70deg. i've been reading and it seems i should be able to get at least 1280MHz some people are getting well over 1300MHz. i 3 monitors not sure if that makes a difference. At first i thought it was a power issue i had a NZXT 650w PSU so i bought a 900w PSU and it made no difference. I need help here is my specs:

CPU: FX-8350 @ 4.8GHz 1.48v
RAM: 8GB G.Skillz DDR3 1600 8-8-8-24 @1600MHz
MB: Asus mATX M5A78L-M/USB3
PSU: Antec High Current Gamer HCG-900, 80 PLUS BRONZE, 900w
GPU: EVGA GTX 770 ACX SC 4GB 1228MHz Clock / 8.552GHz Memory Clock
 

Phaseonedsm

Honorable
Oct 15, 2013
21
1
10,520
i was afraid that might be the case just thought in most cases you get crashing and such when the card gets to hot, thought it would be more of a heat issue. The vRAM is great the highest i've seen just the core clock is crap.