Hummmm....

Question 1) I have a XFX 4870 video card... will I void the warranty by installing a aftermarket cooler ?? I can't tell on their web site... anyone have any experience with this ?

Question 2) I have two hard drives, my sata drive has vista and was the only drive plugged in when I installed it...
I have a eide drive which has windows 7 installed and that was the only one plugged in when that was installed...
What would happen if I shut down, plugged them both into the motherboard at the same time and booted up...would I have a dual boot situation or one would boot up and I would no longer be able to boot up the other OS ??

Thanks all !!