PC not posting with 2 sticks of RAM

[FPS Scotland]

I recently had a massive overhaul of my PC, replacing my motherboard, CPU and RAM. After long hours of troubleshooting I got it working, albeit with half the RAM. The PC works absolutely fine with one sick of RAM installed, but when I try and install the other stick, either together with the working stick or alone, the PC doesn't post, and the RAM error light flashes on my motherboard. Any solutions?

Mobo: Asus Z170 Pro Gaming
CPU: i5 6600 with stock cooler
GPU:R9 270X
RAM 16GB Corsair Vengeance

 

[Puff3r]

Replace the bad RAM chip.

 

[badboyrog2]

where and how you installed the second ram? a2 dimm and b2 dimm should be use for dual channel setup

 

[FPS Scotland]

A2 and B2 are where I am installing the RAM

 

[badboyrog2]

try with only one ram ..but the other or the second one to see which ram is defective...
if the both ram work when they are installed alone ... the mobo is maybe faulty

 

[FPS Scotland]

I tried that. One stick works when installed alone, the other doesn't. With only this stick installed the PC doesn't POST at all. Does this mean it is faulty?

 

[Puff3r]

That is the most likely scenario.