foscooter :
You're looking a WAY future proofing your system!
By the time OS fully utilize PCIe drives, we'll all need new rigs anyway, since CPU will be better/faster, and chipsets on mobo the same.
Any new OS (usually) will be backwards compatible, to support extisting hardware with several exceptions with Windows 7 and printer drivers.
i thank that you misunderstand what i mean, i wont the motherboard to be designed to accept a harddrive in te pcie slot, sorry it took me so long to respond to you but i was on another thred, you seem to like your set up thow, it is not really for furture proffing thow, here is a prime example of what i mean, in 2002 i bought 4 36.4 gig rapters hdd's thay were set up to accept both ide and sata conectors, i still use them today, what i really look for it tech that is ahead of its time. that has a lot to do with my job, i am a electronics design engineer i don't design compters, but the tech is universal to a point, my biggest problem is choosing the wrong tech like beta, LDP, and firewire, i have made bad chooses in the past about tech. what will make it and what does not so today i reach out to other's like yourself to get there openions on the situation, by the way my spelling is horrible, and i do not check everything with ms word so pleases excuse me for this.