Hi I am trying to figure something out I know I can put a Z77 CPU and a Z68 Motherboard by just updating the Bios but you have to start off with a Z68 (Sandy Bridge) CPU first. What I am planning on doing is build 2 computer one for me and one for my little brother and i'll use his Z68 CPU for a bit to update the bios. The problem I am having is when I update the Bios on the Z68 Motherboard to use a Z77 CPU will I get PCI-E 3.0 because I plan on using a GTX 680. I know this is probably way to obvious for a noob but I just want to be sure.
The motherboard ill be using is a GIGABYTE GA-Z68XP-UD3P
Ill use a Core i3 (Sandy Bridge) to update the bios and then Ill be using a Core i7 (Ivy Bridge)
Now your probably wondering why I am doing this, It's because the Z77 motherboards aren't great looking (I know stupid) Most Z77 Motherboards have VGA & DVI ports on the I/O on the motherboard. I don't like that it doesn't look good, and I can't seem to find one with only an HDMI without going over my budget.
GA-Z68XP-UD3P (rev. 1.3) has the pcie 3.0 support, the GA-Z68XP-UD3P (rev. 1.0) doesn't have.
I don't know what revision your mobo is, but anyway it won't make a difference in terms of performance pcie 3.0 vs pcie 2.0 : http://www.hardocp.com/images/articles/1341219566Ew8yr7...
The important thing, is to update the mobo with the latest bios with a sandybridge cpu.