Router bogging down gigabit network?

[Bryan]

I do have a question! If not all network adaptors support the full 9K jumbo frames, will mixing 7K and 9K stuff have a negative effect on the network?

Haven't had any issues on my network, except when I try to force frame sizes.

[Windrunner]

Have a gigabyte K8N pro with a realtek 81xx series NIC ( had to look at site, it's currently having Ubuntu put on it ) that seems to be blatantly ignoring its MTU size setting in windows XP. It's set to 7K but isn't working.

[Bryan]

Windows will not effect your ubuntu settings, it has to be set in each OS.