Copper medium is the same as CAT6 cable - copper wires.
Fiber is for fiber optic cables - strands of glass to transport flashes of light.
Fiber is excellent for high speeds, very low susceptability to interferance, and just rocks. Only down side - VERY expensive.
Better used for LONG cable runs - upwards of 10 or more miles.
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Athlon64 X2 4200+ @ 2.5Ghz (250FSB x 10)
OCZ VX 1GB 4000 @ 250FSB (6-2-2-2 timmings)
DFI LANParty nForce4 Ultra-D
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OCZ PowerStream 520W PSU
ATI X850XT PE (Stock)
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Eheim 1250
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