I have an aopen minipc with the intel x3100 adapter. It runs most/all of the
N64 games at full speed. The only problem is that the drivers are in a massive
state of flux right now. If you use the old (tagged) drivers, they have some
major bugs. If you use the newest (git tip) drivers, you have to compile your
own X server. If you're up to the task of building the drivers (its difficult
but not as bad as compiling X) I can give you the git hashes of the revisions
that I'm using.
I love my minipc MP965. It only consumes 21 watts at idle, and when one CPU
core is pegged about 40 watts. I put a T7500 CPU in it, which is the 2.2 GHz
Core 2 Duo mobile, so it's as powerful as most desktop PCs. Wireless KB/mouse,
wireless gamepads. It's a great HTPC box; I have it attached to a 32" CRT TV.
I bought it from amazon.com:
They have a separate UK site, but maybe they'll still sell it to you.