3rd: Number of CPU Supported.
S = Single
D = Dual
Q = Quad.

4th: Chipset /Board Type.
A = Workstation
B = Blackford
C = San Clemente
T = Tylersburg
W = Seaburg

5th & 6th: Controller Support
3 = SAS
8 = Dual Channel SCSI
E/I = IDE
L = Low Cost
N = 3U and above UIO
T = Twin
INF = Infiniband
10G = 10 Gigabit Nic
X = Lots of PCI Slots