Slow Transfer Speeds

Got an odd issue, I've got a small network in my apartment consisting of a Linksys WRT330N gigabit router which then runs into a Netgear GS108 gigabit switch. Computer A is plugged directly into my Linksys router. Computers B and C are plugged into the gigabit switch. If I transfer a 1GB file to computer B, it does it in less than a minute. Transferring the same file to computer C, on the same switch, takes about 6 minutes.

I've already replaced the NIC, 2 different ethernet cables, even a reformat (it's a sandbox machine anyway) and nothing helps. I'm looking for an older 5 port linksys 10/100mb switch to test that out next.

Any ideas?

Update: Just plugged the cable that was feeding the gigabit switch directly into the computer and still seeing the slow transfer speeds. This should effectively rule out the Netgear switch as an issue. I'm looking towards software maybe?

Update 2: Trying to transfer a 1GB file from computer C to computer A (the reverse) takes less than a minute. WTF?

what operating systems?

XP SP2 on both. Computer C was formatted not more than a week ago, Computer A was reinstalled early August.

If not to much, maybe a new router?

Is computer C a multi core AMD? If so, there is a patch for just this thing.

A15G:

Issues happened directly off of the Netgear switch after some more testing last night, the router shouldn't be the issue.

Don256us, any links about said patch?

While AMD does not specifically say that this is the issue it will fix, here is the link
http://www.amd.com/us-en/assets/content_type/utilities/DCO_1.1.4.zip

To my knowledge, I believe that others have found data transfers to speed up.

Well, I thought what the hell and configured both machines with a static local IP address before I did the patch.




Problems solved. WTF?