If it says HD AUDIO or AC97, thats a connection to the mobo sound card and not the one you want.
thats exactly what i've got...I'm now on a hunt for the mobo manual, which has run off mysteriously. I think my parts are conspiring against me

If it says HD AUDIO or AC97, thats a connection to the mobo sound card and not the one you want.
I feel really sorry for you, you clearly worked hard to get the rig and now a stupid memory incompatibility is stopping you from enjoying your monster PC. I hope you are able to get it sorted soon.
I think you will need to contact OCUK on monday, I don't think they are open on Sundays. If you told them your problem and directed them to this thread they will hopefully allow you to exchange your RAM for that Kingston stuff, and just pay the excess cost + shipping.
I have not failed a thousand times, merely learnt one thousand ways not to build the light bulb.
See with it auto shutting down after about 10 seconds would have led me to guess at a heat problem, i guess not though...
atleast with the auto shut down its preventing any damage to the rest of the system
Yep... there's no chance that it's overheating before it's even managed to POST. The heatsink would have to be completely detached for that to happen!