I'm not a tech-geek when it comes to the internal workings of a computer.......I don't know if what I have is considered 'OK' or not, but I bought a new machine in October '09 (I think the same month Win7 debuted) after a 5 year-old Compaq went the way of the dinosaur....... and, according to the paperwork, it has duel AMD Athlon II drives...and 750 gig of memory..............and after 16 months or so, it has done well.
It might crap out tomorrow, but for slightly less than $400 out the door, I can't complain. I back up my data on a separate 500 gig external hard drive in case of a catastrophe.
YMMV, of course.