I bought a kit of 100% Quad-Tested PDC24G6400LLQK 4x1GB to run on my eVGA 680i SLI motherboard.
The system is highly unstable with all 4 sticks installed. The best result I've been able to achieve is for windows to lock up shortly after boot. The majority of the time, the system won't even post.
I have tested each stick individually, and they all run fine. I have also tested all the sticks in combinations of 2 and 3 as well, and they work fine. As soon as I add a fourth stick, I encounter problems.
I don't believe it is an OS problem, as most of the time with 4 sticks I have trouble POSTing.
Settings I have tried adjusting:
Updating to latest mobo BIOS
EPP profile settings
Memory clock speed
Mobo chipset voltages
This is an Alienware Predator2 (P2) case with excellent airflow.
If I am not mistaken, this memory kit is the same kit that Alienware uses on their systems with this same motherboard. I verifired compatability before buying this kit.
What other options do I have? Is there another kit that will work that I can trade this in for?