I thought my PSU was going to be enough, but it just hit me that it might be the cause of my overclock problems.
I can't go over 1125 mhz on the core on my 7870, with 1125 and below its stable. Is this a PSU problem? It shouldn't be, but it has been boggling me the last few days why my 7870 has so little oveclock headroom. Thanks. I mean, my PSU should be plenty, dunno why it's unstable at those frequencies.