Network Utilization & Transfer Speeds on Gigabit Network?

[arthurleung]

Thanks very much for the detailed reply!

I am actually back to square one, transfer speeds of under 12MB/s with the new Intel NIC. Not sure if changing the MTU on the router would have an affect? Basically I had problems with the internet dieing and transfer speeds slowing when the connection was being maxed out but *touch wood* altering the MTU has sorted this.

As for Jumbo Frames, I'm not sure at least from what I read that my router supports them.

12MB/s appears to be running at 100Mbps rather than GbE. Check if all your cables are all Cat5e/Cat6? Too long of a cable >10m can also affect GbE.

[aidanjt]

Thanks very much for the detailed reply!

I am actually back to square one, transfer speeds of under 12MB/s with the new Intel NIC. Not sure if changing the MTU on the router would have an affect? Basically I had problems with the internet dieing and transfer speeds slowing when the connection was being maxed out but *touch wood* altering the MTU has sorted this.

As for Jumbo Frames, I'm not sure at least from what I read that my router supports them.

If you're using Virtualbox, uninstall that (or at least it's network drivers). Virtualbox has a horrible bug where it throttles host network performance something shocking.

The default MTU on Gigabit Ethernet should get you well over 100MB/s.

[Xaar]

Sounds like you're running at 100mbit, or mayb half duplex.

To rule out disk throughput, use iperf to test the bw between machines

[Speed]

12MB/s appears to be running at 100Mbps rather than GbE. Check if all your cables are all Cat5e/Cat6? Too long of a cable >10m can also affect GbE.

Yeah thought that myself, just tested it again and it was doing between 12MB/s and 15MB/s. The task manager network link speed states 1Gbps and the network card is forced to a link speed of 1Gbps Full Duplex.

If you're using Virtualbox, uninstall that (or at least it's network drivers). Virtualbox has a horrible bug where it throttles host network performance something shocking.

The default MTU on Gigabit Ethernet should get you well over 100MB/s.

Is Virtualbox something setup as standard? If not then it's not enabled. Network drivers came from Windows update.

Sounds like you're running at 100mbit, or mayb half duplex.

To rule out disk throughput, use iperf to test the bw between machines

If you read the OP, I've already ruled that out. As for iperf, I couldn't get it to run right, it was reporting slower speeds between my server and W7 setup than I was actually getting by transfering files between the two.

[Speed]

Quick update, I went to the Intel site to download some drivers in case the Windows update ones were not the most up-to-date versions. Found what looked like v14, although I couldn't find the driver versions anywhere in the release info! What good is that Intel?

So I downloaded the package, installed it and it gave me a few more diagnostic options in tab from in the adapters properties. Ran all the rests, cable, hardware etc and them seem to all pass. The driver version is exactly the same as before and the date is actually earlier than the date Intel had on their website, so I guess when they updated it the driver stayed the same while other parts of the package were updated.

Anyways, I've tested transfer speeds and I'm getting 30MB/s to 40MB/s depending on the files where as just before the update, I'd be lucky to get 15MB/s. I have actually had this before when I first installed the card, I so I can't say it's really solved until a few days have passed and it's still the same.