Weird Network Problem

PacE1971 · 15 Jun 2011 at 19:47

Hi,
Wonder if anyone can help me on the following:

I have a Nvidia GTX 460 card and I've a dual display (extended desktop) with a 23" LG LCD and a 40" Samsung LCD TV from the card for 2 weeks now without an issue (both at native resolutions). The 23" LCD was connected via a HDMI cable and the 40" LCD was connected via the VGA cable.

Today I swapped from a HDMI cable to Dual DVI-D to connect my 23" LCD TV. Almost instantly I noticed that my internet speed went from the average 12mbs to dial-up speeds!

If I disconnect the DVI-D cable or disable the 23" LCD monitor my internet returns to normal. As soon as I enable it or plug in the DVI-D cable again, it dies.

I've tried uninstalling & reinstalling graphic & network drivers all afternoon. All the other PC's in the house are fine so I know it's not an issue with my ISP.

My other PC specs are:

Operating System
MS Windows 7 Home Premium 64-bit SP1
CPU
Intel Core i7 860 @ 2.80GHz 30 °C
Lynnfield 45nm Technology
RAM
6.0GB Dual-Channel DDR3 @ 661MHz (9-9-9-24)
Motherboard
Packard Bell ipower G5800 (CPU 1) 30 °C
Graphics
M237WDP (1920x1080@60Hz)
SAMSUNG (1360x768@60Hz)
NVIDIA GeForce GTX 460

Many thanks

kae2 · 15 Jun 2011 at 19:50

Sounds like it could be interference. Is it a wireless connection to your router?

PacE1971 · 15 Jun 2011 at 19:52

Yes it is a wireless connection to the router, but how would using a different cable to connect to a monitor effect my internet? Tried to Google the problem but found zilch

PacE1971 · 17 Jun 2011 at 08:04

Just an update on the above.

1 - Tried a different monitor
2 - Tried another DVI-D cable

Problem still the same

stulid · 17 Jun 2011 at 08:54

Wouldn't this be better of in the right sub-forum?

TWiNKLeT0Es · 17 Jun 2011 at 09:23

Try a different network channel to rule out interference.

Channel 11 & 14 can have trouble with some LCD displays i hear.

olivier renault · 17 Jun 2011 at 10:17

PacE1971 said:
Yes it is a wireless connection to the router, but how would using a different cable to connect to a monitor effect my internet? Tried to Google the problem but found zilch

Electro-magnetic interferences. Can manifest itself in various ways. I used to have a guitar and amp that would pickup BBC radio / police wireless.

PacE1971 · 17 Jun 2011 at 10:54

Changed channel to 1 from 11 and was fine for about 30 mins then has dropped again. Called SKY and they have said my connection is fine and have ran a few tests and they are happy with everything at their end.

Also checked through Device Manager etc and there are no apparent issues there either... really bugging me now :S

Ch3m1c4L · 18 Jun 2011 at 11:07

try a different cable? youve narrowed it down to being the cable/type of cable, so just dont use it or use a different cable, I dont see what the problem is, Interference happens.

A new lampost went up outside my parents house, and I have to change the wireless channel that had been stable and fine for 4 years as it now dropped every few seconds.