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Originally Posted by greencreeper
Not sure if this is correct but I've always likened USB to a software modem - all the processing is done by the CPU and not by the modem, which is basically just a PCB with a hole to plug the cable into. This introduces variances in performance that are dependant on a huge number of factors, including the CPU, motherboard, BIOS and software installed.
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basicly what i said a few posts back, you are indeed correct about the CPU hardware factors being the Decider in how the USb modem performs, AFIAK the USB modem does have the Encode/decode hardware inside but has no internal CPU unlike its Ethernet big brother.
the Overhead for USB devices like his can be quite big with lower end systems, gaming enthusiasts would fare better to go with Ethernet for Max online performance, which basicly is the Only application in which Ethernet will outperform USB given its CPU heavy nature.