Thanks for this.
I've tried both and funnily enough, I thought the video memory size might be where the problem is.
But then, the x300se has hypermemory too.
I'm on the latest bios available, which was released in 2006/7 (!).
I suspect it's just too old.
Oh, I updated the chipset drivers too, no joy
Another annoying thing is, that after hours of research, I'm seeing all sorts of cards (even the 5670) recommended that should work, but never any confirmation that they actually do.
Or any that say they don't.
Hence this post