IS7 and K8V LOM (3C940) LAN Performance Problem

[Centroid]

I have both an Abit IS7 and an Asus K8V Deluxe. I am using the on-board LAN
controller to connect to my 3Com 100 Mbit hub. Problem is both have dismal
upstream performance, that is, copying from either of these systems to other
network drives shared by my network.

1. All drivers are current and both LOM's pass the 3Com NIC self test and
such. Set to autodetect medium and speed. Also force these to 100 to no
avail.

2. Cables are full 8-wire cat-5 and have tried spares.

3. Removed and let Windows XP (on both, btw) re-detect and install drivers.

4. Used a different hub (an SMC 10/100).

Is anyone else having problems similar to these? Anyone have additional
suggestions to isolate the perceived, anyway, problem?

Thanks in Advance.

 

[TomG]

I don't have any problems with the 3COM version of the onboard NIC but on my
IC7-G, I had major issues with the Intel Gigabit NIC. That adapter driver
set had a utility to monitor the performance of the adapter and it would
report damaged packets by the hundreds in short order, amounting to many
thousands of damaged packets in a few hours time.

a view of a chart of network activity of consistent downloading to the
adapter from any source would show large, jagged peaks and valleys
representing large variations in throughput. I turned off that adapter in
the bios and inserted a good old PCI version of an Intel 10/100 NIC and the
same charts were incredibly smooth and my throughput is very consistent.
interfacing with other computers on the LAN used to be slow and inconsistent
and now it is responsive.

I guess what I am trying to say is that I had no idea what was giving the
Intel Gigabit NIC problems and causing the data loss from damaged packets.
I ran a good quality cable and that same cable is connected to the current
Intel 10/100 NIC and is (and was) connected to a 10/100 switch. you can
spend some time trying to diagnose the problem but one of the quickest and
not very expensive methods would be to install a decent quality PCI NIC and
see if the same problems exist. if so, you have eliminated the onboard
controller and can now look elsewhere for the problem. I'd bet, though,
that the problem will be gone and you can say screw it and move on... your
time is worth something too!

--

Thomas Geery
Network+ certified

ftp://geerynet.d2g.com
ftp://68.98.180.8 Abit Mirror <----- Cable modem IP
This IP is dynamic so it *could* change!...
over 120,000 FTP users served!
^^^^^^^

 

[- HAL9000]

I have discovered that maximizing or minimizing a window (in winxp)
will markedly reduce ethernet throughput for that brief instant in
time when the window is transitioning. I am using an el cheapo
ethernet card. One of those Intel ethernet cards, with onboard memory
buffer, as Tom was suggesting may do the trick.

Forrest

Motherboard Help By HAL web site:
http://home.comcast.net/~hal-9000/