opteron dual core

[Jack Howarth]

    I am in the process of building a new Linux workstation using the
Tyan Thunder K8W (S2885) motherboard and a single dual core Model 270
Opteron. While I know that this motherboard will support the dual
core Opteron, I am confused about the possibility of adding a second
Model 270. Although Tyan claims adding a second dual core Model 270
will work, I am concerned about the 2-way description of the 2xx series
processors. Does this refer to the 2 physical chips or what? My gut
instinct is that this notation implies that only a single dual core
is usable on the motherboard and that a 4-way (8xx series) processor
would be needed to use both sockets on the motherboard. Thanks in
advance for any clarifications.
                    Jack