This true for HP workstations. Dell apparently managed to get SLI working
with the i5000x chipset, through a riser card that splits one PCIe x16 slot
into two PCIe x8 slots using a bridge chip. It's similar in principle to the
7950GX2 implementation, but uses discrete cards. The chassis backplate is
custom to allow the slot brackets to line up. I guess Dell had sufficient
sale volume to justify this design with nVidia.
http://forums.2cpu.com/showpost.php?...8&postcount=18

--
"War is the continuation of politics by other means.
It can therefore be said that politics is war without
bloodshed while war is politics with bloodshed."

"Benjamin Gawert" wrote in message
...
But SLI is only supported with Nvidia chipsets, and since there are no
Nvidia workstation chipsets (nForce Professional) for XEON but only for
Opteron there is no XEON workstation with SLI support.

Benjamin