Flaky on-board ethernet adapter

jimmyj68

Senior member
Mar 18, 2004
573
0
0
Some time ago (month or so) I was posting about my struggles with the Cisco Valet and ethernet connection to my PC. I sometimes couldn't get on internet at all or it would be so slow that it was unusable.

The wireless mode was functioning flawlessly and was used for internet access by my wife's computer downstairs. After and during considerable messing about including purchasing a new Cisco Valet, and learning that some security suites could cripple your ethernet adapter to keep it "secure" - and removing and replacing the adapter software any number of times. I got my system and router semmingly working together quite well but it wouldn't work properly if the latest intel motherboard Lan driver was installed (Intel DP55SB). I chalked it up to some incompatibility with the new Cisco Routers in the Valet series.

About a week ago, it became very slow again (not unusably) and speed test would give me varying reads between 1.5 and 10. I decided to try the latest driver again and cleaned up all traces of the original driver. Installed the new, latest, driver and lost all internet connectivity with the direct connected cable ---- wireless was still working like a champ.

Decided to order a PCIE ethernet adapter made by intel from the EGG. Cost a total of $40 bucks after shipping etc. Bios disabled the onboard adapter, installed the new PCIE and it downloaded the latest driver from Intel and began working faster than I've ever had before to a wired connection.

I'm not about to tear my machine apart to send my mobo off to intel because apparently the ethernet adapter is faulty. It's just not cost effective timewise or money for shipping etc. But - all the hassle I went through was due to a faulty Lan adapter on my DP55SB board. Last I checked, speedtest gave me close to 15 MPs from ComCast and the system is working solidly at 1 gigabit.
 

postmortemIA

Diamond Member
Jul 11, 2006
7,721
40
91
it seems to me that it is more likely that cable speed varies through the day. My speed varies significantly,; even if I run same speedtest twice in a row. Good way to test 100/1000 adapter is to copy huge files within your own network.

I have intel's gigabit network adapter in two of my PCs. both are over 3 yrs old. Never a problem.
 

degibson

Golden Member
Mar 21, 2008
1,389
0
0
Parts are flaky. Highly-integrated PCBs (e.g., motherboards) are more likely to have faults than lower-density PCBs (e.g., network interface cards).

I wouldn't bother with the MB RMA either -- it's have an isolated malfunction, which you have fixed cheaply.