I can confirm that Backtrack runs fine on the following spec:

Asus M4A78 PRO MB with 780G chipset
AMD Phenom II 940 BE
8GB DDR2 800
XFX Radeon 4850 1GB
2xWD 500GB black RAID0
2xWD 1TB green RAID1
Realtek USB wireless (alfa 1W)

Also, I have used it with an HP pavilion dv6710 laptop too.