What could be causing this network problem?

[probedb]

I've now got a graph of my network utilisation to show the problems I'm having.

Both cards have up to date network drivers and are auto-neg to 100Mbps, for some reason they won't go to 1Gbps even tho both cards function that way. One card syncs at 1Gbps, the other (Intel PCIe) does not. Both are up to date Win 7 Pro 64 bit.

Any ideas? It's really annoying me now. Thing is the two gigabit onboard cards both do this on my mobo (Asus about 4 years old) so is this a weird motherboard issue?

Any thoughts? Next on my list is replacing the board with the same one as the other PC.

Cheers
Paul.

 

[probedb]

It's going through a gigabit switch. It seems to be a general issue, not just when copying. I.e. when playing video across the network it'll freeze every so often.

I've ordered a new mobo which is the same as the server so hopefully that'll sort it.

 

[probedb]

It's name was Eset Smart Security, obviously not that smart for it to do that to my network!

The network syncing issue appears to be the 5-port gigabit switch i have, if i connect directly to the 8 port one it syncs at 1gbps. It's odd that my other PC connected to the same switch is fine though.

Bloody networks. It has made me decide to get a managed switch though