Hardware related Stuttering

[Brian_W]

Well I can't read japanese, and by them saying switching hub sounds a little bit fishy to me. I looke don newegg and they have 8 port gigabit switches by netgear, dlink and other for 40-50 bucks for 8 port. If you truly want gigabit, I would probably stick with a known name. I noticed you are in japan, so not sure where you would buy one of these over there though. There is a HUGE difference between a hub and a switch so it might be worthwhile to try a different gig switch.

Brian

*NOTE* I have no experience with this IO Data at all, so it very well could be a true switch, just not a good one. Not sure.

[csy]

I strongly suspect that your NIC and switch are incompatible with each other.

GigE is designed to work over a minimum of plain Cat5, as per IEEE 802.3 standard. Even a poor quality Cat5 cable should connect at GigE, but packet loss would occur if the cable quality was poor.

I suspect auto-negotiation to be your problem. 1000BaseT auto-negotiation has to automatically determine MDI/MDI-X (cable wiring being straight, 10/100BaseT crossover, 1000BaseT crossover), and determine speed, and duplex. The problem is both link partners are doing this simultaneously, and they get confused, particularily when different maufacturers equipment are connected together.

I your case, I suspect that when you connect the Cat6 cable, then both ends are negotiating to gigabit speed, but one end has fallen-back to half duplex mode, therefore causing packet loss, seen to the user as video studdering.

I recommend trying a known good brand switch and/or NIC, eg 3COM

[rbelisle]

Zathras,

What version of the Nvidia drivers are you using? I have recently updated my drivers to 91.47 drivers and for the first time I am getting what you seem to be describing. In Live TV mode, I get a visible stutter every few seconds. It almost isn't perceptible or a problem, but it is enough to notice.

[Zathras]

Thank you to all!!!

CSY and Brian I will look into the switching hub issue.
The two big companies here for home/small office networking are Buffalo and IO DATA.
I went with the IO DATA because I read the the customer feedback and this product garnered better satisfaction than bufallo.
To be honest I don't even know if 3com is licensed to sell here in Japan. I will have to look.
csy I really appreciated the detail of your post, you really know your stuff. The only thing I can say from my experiences here is that the old cable that I am using connects at 100mb/s. It states it is verified to 568A LL84201 so one would think it would support a GigE connection but it doesn't.

Again thank you to all I will continue my experimentation and post the results.

rbelise ~ My drivers are updated to the same as yours. However my stuttering issue appears to be related to my network hardware. But I anot ruling anything out.

Kevin