Slow Network Transfer

[Rhombuss]

Running XP Pro on both computers. One is a 1.6A other is a 2.4C, both using DLink 530TX nics. They're being run through a Netgear RP114 router with 100mbps full duplex. MTU is set to 1500, so TCP/IP packet sizing shouldn't be a problem. Generally with a 100mbps full duplex setup, I can usually top out at 2000 k/sec, but I'm only hitting around 500 k/sec now. My network utilisation hovers between 3-4%.

What known network issues are there that induce slow network transfers that are NOT the following: bad cabling, incorrectly installed adapters, incorrect setup of OS network.

Thanks in advance!

 

[onelin]

Might want to list out all devices on the PCI bus...as I had a strange issue a while back, a friend got an audigy soundcard and it was the culprit (those POS cards send noise over the PCI bus, and cut LAN speeds to less than half, maybe 1/3 of what they were) ... he replaced it with a different card, and the issue vanished.

Also, it looks like you're overclocking (checked rigs for audigy) ...for kicks, try a transfer speed at stock settings, too.

 

[Rhombuss]

Actually, the systems haven't changed for a while, and at some point in the past I was getting the 1000 - 2000 k/sec transfers. It might be something software related - are there any diagnostic programs that would trouble shoot a TCP/IP network?

 

[spidey07]

I know you said no cabling but that sounds exactly what it is. So try known good cables.

Also set the nics to auto-negotiate speed and duplex. If you have a duplex mismatch (one side of the link is full, the other half) it can cause these symtpoms.

10 Megabytes/sec is normal for 100 Base-T, so even 2 megabytes/sec is really slow.