10C cpu temp increase after installing modem/router

[ives]

Hi,
I have a puzzling problem that I can’t seem to find a solution to.
I have just ditched my PCI ADSL modem in favor of an ADSL modem/router (Origo ASR 8000) that serves my home network (2 PC’s: one XP ,one Linux)).

Now, the router has one Ethernet port and one USB port.
I need to use the Ethernet port for the Linux PC which leaves the USB port for the Windows XP PC.
So far, so good. Networking is fine, internet sharing is fine. However, on the XP machine that uses the USB interface, the CPU temp has gone up by 10C or more while the CPU usage stays the same at a nominal level of around 3%.
If I connect the XP machine to the Ethernet port instead, the CPU temp goes back down to it’s normal level ,with the CPU usage staying the same.

Having spent countless hours perfecting the cooling of my PC, I am loath to accept a 10C increase in CPU temps.

Does anyone know of a solution to this or has anyone heard of a similar problem?

Cheers
Ives

[Rabs]

hmm, maybe the voltage regulator for the USB ports is heating up, but making the cpu go up by 10c?

I have solution anyway, as your using a router - buy a 4 port hub (switch) and use both machines via ethernet and network cards.

[ives]

yes, that is a solution, Rabs.However, I couldn't afford a 4 port router so i got a 1 port with USB.
It just seems strange that the cpu temp should go up but teh cpu usage stays the same.
Also, someone else on another forum posted a similar problem.

[yamangman]

The increase in temp is due to the fact that the traffic over the USB interface is regulated by your processor, whereas with the Ethernet port, the traffic is regulalted by your Network Interface Card. In other words, while USB ports are in use, some of your processor is dedicated to their function. Although 10 degrees seems like a lot.

[Rabs]

The increase in temp is due to the fact that the traffic over the USB interface is regulated by your processor, whereas with the Ethernet port, the traffic is regulalted by your Network Interface Card. In other words, while USB ports are in use, some of your processor is dedicated to their function. Although 10 degrees seems like a lot.

Surely as the USB port in question is idle, it will not be using negligable cpu time 1-2% but that wouldn't make the temps go up by 10c.- the only thing it will be using is power, which will probably be 500ma.

I know via/sis chipsets have fun with USB stuff - I dont think there will be a specific fix for it (software or changing some settings/bios options).

Two solutions:

1) Buy a hub (switch) and use both machines over ethernet, heres one for 2p under a tenner:

http://www.scan.co.uk/Products/Produ...ProductID=2279

2) Live with it, as long as your computers stable under load (games/prime 95 etc) you have nothing to worry about.