Current specs:
Asus X99 Deluxe II (Bios 1504(latest))
64GB of Corsair Vengeance DDR4-2133 (4x16GB) (CMK64GX4M4A2133C13)
Intel 6900K
Geforce GTX 980
Corsair RM750
Intel 730SSD
Couple WD HDD's
Both windows and the bios only recognize 32GB. Bios only sees two sticks, but CPU-Z sees all four.
So this issue actually started around 2 years ago. My specs then were Asus X99 deluxe, Intel 5820K and 32GB of Crucial ballistix elite(4x8GB). My PC then only recognized 16GB. I've tried changing memory voltages, XMP, changing slots, tested memory sticks 1 by 1, msconfig, memory overlocking and overvolting, bios update, OS reinstall but nothing worked. I RMA'd both the memory and the motherboard, and after waiting 3 months for a new mobo (thanks ASUS support, Crucial RMA only took about a week...) the issue remained. Only 16GB recognized... I've just kept working with 16GB despite needing more.
Fast forward to December 2016, I've upgraded my CPU, Motherboard an Ram to my current specs. All other parts remained the same. I reinstalled the OS, booted up windows and what....??? Only 32GB's of my 64GB's are recognized by windows and the bios? I've upgraded all parts that could've caused the issue but it still remains... So I've tried the same things as before, memory voltages, swapping mem sticks and slots, etc. but without luck. Bios only shows 2 slots occupied, sometimes 2 different slots but never more than 2. Windows sees 32GB but the strange thing is that Cpu-z sees all 64 in 4 slots. I'm currently out of options. I can't afford to wait for another RMA and I don't think it'll help.
What else can I do?
Could the GPU or PSU be affecting my memory?
Or is my memory kit (and the one from 2 years ago) just incompatible with my motherboard?