I'm getting terrible FM interference from the CarPC - it's driving me crazy as I mostly listen to the radio.

At the moment I've got a cheap Jetway MB - I've tried most of the fixes I can find by searching: Everything is grounded, it's in a metal case, has ferrite chokes on all cables leaving the PC. I've turned on the "spread spectum" option in the BIOS, but nothing has made any difference.

The antenna is roof mounted on the rear of the car, the Car PC is in the boot/trunk - separated by 3-4 feet and the car body work, so the amount of EMI must be pretty significant.

Are any other brands of motherboard better in terms of the amount of EMI released?

Searching on this topic shows it's not uncommon, but the majority of people seem to be OK, so it can't be every system that is affected.

Thanks

Ian