Summary: All I can say is that this is really good RAM. It's fast and with this amount you'll be future proof (for a while). However, the first kit I received had one defective memory module. It took G.Skill 5 weeks to replace my RAM. The replacement kit I received works perfectly fine. It looks cool as well. Fancy red design without being too big in size. Also, this RAM will show up as 11-11-11-27, which is the BIOS I turned to the advertised 9-9-9-24.
Pros: - It's a lot of RAM for a decent price., - Cool design. Not too 'tall', - Fast.
Cons: - First kit had to be RMA'd., - Shows up with 11-11-11-27 timings (read summary).
Pros: Plug-n-play on an Asrock Z77 Extreme 4 mb. Good price, fast. New build, started with 2 sticks at a time, ran memtest no errors. got everything set up, put all 4 sticks in and passed memtest no problem.I'll be splitting these between 2 computers, if 1 wants to upgrade to 16g I'll combine these and pick up new ram for the other.