Hi Anna -
By default, our device drivers will enable MSI-X usage if the operating system and platform are enabled to support MSI-X. Generally speaking, most all PCI Express based motherboards can support MSI-X enabled operating systems. I cannot find a link to the S342GPV (perhaps you mean the S3420GPV) server board, but the Q57 motherboard and S3420GPV will support devices with MSI-X capabilities.
If you indicate the operating system you are using we can let you know if our driver supports MSI-X in that environment.
Thank you for using Intel Ethernet.
Yes I mean the S3420GPV server board, and Q57 based motherboards.
I will use Linux (> 2.6.30), but it doesn't matter because I know that it supports MSI-X with 82576 cards..
I need just to be sure that those MB support MSI-X, because I need to buy one of them as development machine.
Both those boards (and the 82576) support MSI-X. And since you are using a Linux kernel >2.6.30 you should be golden. Happy developing!