We have a few of the Tigers running Dual 2400's with onboard video
Tigers dont have onboard video. The Tiger series consist of the 2460 and the 2466MPX, neither of which have onboard video. The 2460 is the initial rendition, and does not include an integrated network card, whereas the 2466 does. You will need to use a PCI 2.2 compliant card (3.3V) in the 2466, whereas the 2460 will accept any PCI card.
You are referring to the Thunder series. Avoid the 2462 because it requires a WTX power supply which is definitely NOT standard.
The 2469 is your best bet. Latest MPX chipset, onboard vid, slanted ram slots, and optional scsi. Has a EPS power supply (24-pin plug, just like the dual Xeons).. do not use a standard power supply with the 20-pin unit, or you will need an adapter.
The rationale for using a Tyan board over other dual MP boards:
1) Intended to be a server board, not an "enthusiast board".
2) The first PCI slot, where your riser cards will plugin (For rackmount purposes) will be in the correct place. If you use the MSI board or ASUS board, the PCI slot is in the wrong place and you need a ribbon riser card.. talk about a pain in the ***.
EDIT: One more thing. Memory.
Dont bother buying anything but DDR2100, unless price is cheaper for faster ram.
If you elect to use one of the boards with an MPX chipset, you can use TWO sticks of REGULAR, nonECC, nonregistered ram. You cannot then populate the other slots with any ram at all. Using regular ram limits you to use of two slots.
If you use an older board (not MPX chipset), you MUST USE ECC-Registered ram.
If this is a server, use ECC registered ram. Period.
Power Supplies: 350W minimum. Make sure you get the right type (EPS / Non-EPS / WTX) depending on which board. AMD power supplies must meet 30A on the 5V rail, so make sure its AMD certified.
Thats all I have for now. Enjoy your dual MPS