There is no such thing as "PCI-E" booting as a standard.

A system would boot from a PCI-E based board or SSD based on an addon bios chip on the card.

These are known as bios extensions.

If its the ONLY drive in the system I don't see any issues but do not expect to plug this in with onboard

SATA drives and boot from the card.

The OCZ PCIe SSDs use a SATA or raid controller chip on the card. The SSD that's built into/onto the card then uses that controller for it's boot.

OCZ.com States:

"Before installing the RevoDrive it is important to check the settings/capabilities on your motherboard. If you plan on using the RevoDrive as a boot drive please check that your motherboard supports boot over PCI-E, and note that due to limited option ROM space, it is often not possible to use the RevoDrive while the Onboard RAID Controller is enabled on many motherboards."

Sorry, I'm not familiar with the low level/hardware level workings of computers. I know what the BIOS is and what it does but I'm not real familiar with how it does it. All I know is that I've read that some motherboards won't work when trying to boot from the pci-e ssd. Are you saying that my system will support it, will support it with modifications, or will not support it? If modifications or changes are required, what are they?

Thanks :)

I will say again there is no such standard as boot over PCI-E.

The Option Rom aka BIOS Extension is what is controlling Boot or not.

Another common option ROM is a network boot ROM (e.g., a PXE option ROM).

This allows a computer without any disks to boot from the ETHERNET connection.

Can be implemented in either NIC Option ROM, Server ROM or PXE.