On my home network I have all 1000Base-T equipment (cards + switches), but using CAT5e cables and getting thruput about 400Mbps. A while back I bought some Belkin CAT6 cables assuming the perfomance would improve, but to my suprise it got worse ... 200Mbps So I cursed Belkin for selling me sh!t cables and put my 5e cables back.

Today I was going to order some more cables and noticed there were STP and UTP options Looking into it, I realized STP=Sheilded Twisted pair (and U=Unsheileded). I never realized this option existed with ethernet cables, I assumed they were all sheilded. So, I'm guessing the old CAT6 cables I bought were UTP (?). Would it be correct to say then that STP CAT5e cables perform better than CAT6 UTP cables then?

...and is there a big difference in cable manufacturers? Before I assumed Belkin was one of the better manufacturers, but since the 200Mbps CAT6 cables I bought from them, I'm not so sure...