anyone with 280x elypedia ? cant find it ;x

With Claymore V7, it makes very little difference. Just mine with stock BIOS and set core clock as high as possible.

what ya suggest as core then ?

280x?

Try 1100Mhz

I can't believe my 7950's are kicking my rx 480 8gb's!?

7950 166 sol/s
rx 480 8gb 161 sol/s

Any idea what settings I should use for rx 480 gtr

The 7970 has 384 bit memory bandwidth. So the speed is high. But the RX 480 is more energy efficient.