As part of the process of me checking my rig out in preperation for a crossfire configuration, I have been shifting cables, drives etc around in what will soon be a tad cramped PC tower. My OCZ 860W Power&Cooling 'SLI READY' Power Supply Unit, has four PCI-e cables. Two of which have additional optional 8-pin add-on (for NVIDIA cards). The other two just have 6pin heads and it is these other two that I have been using to power my gfx card for the past 18 months. However, just by chance, I hooked my gfx card up with the other two (until now unused) connectors. At first, I couldn't get a display on my monitor...but after powering down and powering up again....I got my display and everything was as normal. However after being away for weekend...(with PC in boot/trunk of car), I found that once again, I cannot get the display to come up on my PC. The solution was to use the two cables that have been in the gfx card for the last 18 months! What the hell is going on here? I have not checked the other two cables for voltage supply as I don't have that kind of device....but they have NEVER been used....and also.....the fan on the graphics card spins away (i.e. the card is receving power) Is it possible that components paired up with each other just kind of 'get used to one another' in some bizarre way?