Which is beter?, please help.

Hey, i have two old computers an want to throw one out an keep the other one for my little girl, but im not sure which one is better???
one is 850mhz but only has 2 ram slots an no video card slot.
the other is 700mhz but has 3 ram slots and an old video card.
i have 3 sets of 256 ram available (both use same ram) and a couple of video cards form other comps but not sure which is best?

i also have an 80g hard drive that wont work with either of them?? it seems as if its not getting anough power coz when i turn on the comp it makes a few wiz sounds but never fully speeds up.??

 

Sounds to me as if the Drive is too big for the mobos. Meaning they can't detect it. Will the computers boot? If they will, try running Everest, or similar, and find out if the processors are the same. You may be able to swap processors and get a better computer.