Sapphire R9 280-X Dual-X what is average OC for them?

Sapphire R9 280-X Dual-X what is average OC for them? Im using Sapphire Trixx, what is safe voltage to go to, and what is a common OC for them? rather then fiddle for days id just pick the average OC and set it and run, and what is ULPS? disable it or leave it alone? thanks :)

ULPS is for crossfire leave it.1.3v max and 1200 mhz if you're lucky.if not 1150 mhz is highly possible.mine is 1200/1650 powercolor 7970 with 280x bios.this is 1240 mhz but i think over 1200 is nonsense.

http://i.imgur.com/yyEC1I6.jpg

I have a pair of them.

One games at 1210 / 1750 with all voltages and power limit set to max in Afterburner.

Other games at 1170ish / 1750 so I leave them both at 1170.

Mine MurrayCoins at 1100/1700 stock voltages.

How does oc on the core + higher voltage affect VRM temps? Does it get much higher than on stock.