Why does my new psu have 3 more wires than the old one

What do you mean "3 more wires"? Do you mean 3 more sets of connectors? If so thats not a problem, the number of strings of a connectors a PSU has depends on its size, bigger ones have more than smaller ones. If you are instead referring to a specific connector having more wires than the old one did can you take a picture of it for us?
 

deadmb

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Jun 25, 2011
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The old one was a liteon,it came with my Lenovo ideacenter.the new one is a logisys.I bought it on e-bay was suppose to be compatible with my lenovo K210