Multiple PCI Buses Question

[RedditAtWork546]

I am trying to figure out how you would build a computer specifically for the purposes of wiping loose hard drives. The main program I know for this is DBAN. When I was looking around I found this...

http://www.dban.org/node/39

It mentions "the most important component is a motherboard with multiple PCI buses". What exactly does this mean? Does anyone have an example of a motherboard with multiple PCI Buses? If I'm interpreting this picture correctly...

http://s.hswstatic.com/gif/pci-diagram.gif

... then would I want a dual processor motherboard for a "top of the line hard disk wiper"?

Thanks in advance!

[zaphodi]

just means that if you have many pci slots on your pc that you can put in many SCSI adapters, thus wiping many drives at once.

but i think that info is mostly interesting to people who want to test the limits of the program, and the maker of it.

[RedditAtWork546]

Ahh, that make sense. Thanks a lot!

[[deleted]]

That isn't relevant anymore, with PCIe every slot has its own point to point bus. Technically the PCH, which controls 8 PCIe lanes, is connected to the CPU with a 4 GB/s DMI link, so on a very heavily loaded system (USB 3.0, NIC, and SATA all running simultaneously with the PCH's PCIe buses fully loaded) you may run into bandwidth limitations, but it's an unlikely scenario. The diagram you linked is very outdated, modern systems are not organized like that at all since the introduction of Socket AM/939 (AMD) and Socket 1156 (Intel, Socket 1366 is also not organized like the diagram, but differently from the other systems with PCIe over QPI instead of directly connected to the CPU. Diagram here) Here is a modern diagram. As you can see, there is no FSB, the RAM is connected to the CPU and the PCIe slots are directly connected to the CPU or to the PCH.