Quote Originally Posted by Raja@ASUS View Post
Check socket for bent pins and check for overclamped CPU cooler. How much DRAM do you have showing in Task Manager Performance tab and how many modules are you running?

After that check which of the slots are not working by removing all the modules and then placing two DIMMs at a time in every channel to check which channel or slots are not registering DIMMs. Also make sure all DIMMs are actually working. If after doing that everything points at the board then contact ASUS support in your region for further assistance or an RMA.

-Raja
I have eight Corsair Vengeance DDR3-1600 CL10 RAM sticks. The problematic stick is always located at D1 which is the first RAM slot. It shows Abnormal in the SPD DRAM menu when the system shows 61440MB RAM.

I removed all DIMMs and then follow the manual to install them one by one. For each installation, I tested three times.

1st run: D1
2nd run: D1 B1
3rd run: D1 B1 A1 C1
4th run: D1 B1 A1 C1 D2 B2
5th run: D1 B1 A1 C1 D2 B2 A2 C2

All showed correct RAM in each of three reboots. Then the problem re-appeared after more tries. Do you think this is a motherboard problem??