I've installed it to couple of low end machines.
Starting from AMD 3k+ single cpu machines with 1G RAM.
Surfing with newest Firefox is fine.
Performance graph is quite full even if left alone but true idle level is unknown.
Only real problem has been unknown network hardware.
And only hickup has been HP dv6 laptop boot but even it is solid and goes on after second try,
probably something with machines drop/park/slap/what HD protection thingy.