I'm having a bit of trouble starting up a mining rig and need help. I'm running windows 7 x64 with 3 280x, all cards identical. Drivers and windows is up to date. I don't have a monitor so I remote log in. Even with dummy plugs for some reason the GPUs idle at 0 MHz and when afterburner is open I can't control anything, not even fan speed. When I hook up a monitor its fine for only the card that's hooked up to the monitor. Another thing is 2 out of 3 cards give no temperature readouts for VRMs but the one card does. Last note, the cards do mine if i run cgminer, but fan speeds do not change that the cards heat up slowly which wil lend up killing them. ULPS is disabled. Any ideas why its happening?