Hi there,
I tried to boot QNX 6..6 from USB  on a 64-bit 8GB RAM notebook computer. However, to my dismay it does not work. Many 
and I suspect that most likely it was caused by the 8 GB RAM which 32-bit QNX could not access to 64- bit memory 
addressing. I will give it a try by removing or reducing the RAM to 4 GB.

However, before I do that, I was wondering if anyone has done something similar on 64 bit 8GB? any success? Share some 
thoughts please?

Best regards
Siow-Lim