My lazy network card doesn't like uploading.

[SamIAm]

Since I built this desktop, the network connection has been wonky. Every once in a while, correlated to use (especially uploading), the net goes out. I can't ping anybody (even the local router), but dis/reenabling the network connection in windows fixes it. I have other machines plugged into the same router, so it's definitely the machine.

Could this really be a hardware issue? It's a Marvell 88E8001 on an Asus mobo, and updating the driver didn't seem to fix anything. Should I just buy another nic and disable the onboard one? That seems like a waste (both of $ and expansion slots).