That one has 6 PCI slots has'nt it ?
How many do you need ?
I don't think you get more than that.
There are server MOBO:s with 10 or even more slots but these are
1. Extremely expensive.
2. The PCI slots are 64 bit so Pulsar cards don't fit anyway.
You really should'nt have more than 3 CW cards in the same computer.
And you should'nt have so many other cards in your CW computer.
So 6 PCI slots should be more than enough.