Here's a link to the Asus list (bottom file). I don't see the modules listed there that you have.
Although I've seen systems run with modules that were not on the approved list, it may be a problem as some of these X58 boards are finicky and going by what I've seen on the Internet in looking at your board, I'd go with approved modules.
My Computer
At a glance
Windows 10 Pro 64 bitCore i7 6700K Skylake 4.0GHzCorsair Vengeance LPX DDR4 32GB 3000MHzAsus Radeon RX480 Strix 8GB
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Wordsworth 5000
OS
Windows 10 Pro 64 bit
CPU
Core i7 6700K Skylake 4.0GHz
Motherboard
Asus Z170 Pro
Memory
Corsair Vengeance LPX DDR4 32GB 3000MHz
Graphics Card(s)
Asus Radeon RX480 Strix 8GB
Sound Card
Asus Xonar DSX
Monitor(s) Displays
HP 2709m
Screen Resolution
1920x1080
Hard Drives
Intel 600p M.2 PCIe NVMe SSD 512GB; Intel 335 SSD 240GB ;Western Digital Caviar Black 1TB
Normally I would suggest swapping the slots the memory modules are in, so if you have 6 slots (A1, A2, B1, B2, C1, C2) and you're currently using A1, B1 and C1, I'd suggest you try with the three modules in A2, B2 and C2. But I'm not sure if this is actually a hardware issue... It's a strange one.
Here's a random thought; do you have any 64-bit Linux installation CDs? Most of them allow you to boot off the disk and run the OS from a virtual drive without affecting Windows. If you do, try that and see how much memory it reports.
My theory here is if it shows 6GB, then something in Windows is causing this. If Linux also only shows 4GB, then it's not OS and more likely something in your BIOS or actual hardware.
I don't have memory remapping in the BIOS of my P6T either. From what I can find memory remapping is now done by default if the BIOS detects more than 4GB of memory, and no enable/disable function is now written into later BIOSs. This is from a conversation between someone with your problem and an Asus tech on their site. Can't confirm this beyond mine not having memory remapping and others with your problem being told to do this and not finding the BIOS option. The suggestion to this poster was to flash the BIOS to the latest.
Check the BIOS version (in the Start button Search box type system information then select it) and date then look at the Asus site to see if a later version is available and read what problems BIOSs since yours is said to solve. If you decide to go this route and you have never flashed a BIOS before you'll want to read your manual carefully and seek further help here. Screw up a BIOS flash and the motherboard can become a large paper weight.
My Computer
At a glance
Windows 10 Pro 64 bitCore i7 6700K Skylake 4.0GHzCorsair Vengeance LPX DDR4 32GB 3000MHzAsus Radeon RX480 Strix 8GB
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Wordsworth 5000
OS
Windows 10 Pro 64 bit
CPU
Core i7 6700K Skylake 4.0GHz
Motherboard
Asus Z170 Pro
Memory
Corsair Vengeance LPX DDR4 32GB 3000MHz
Graphics Card(s)
Asus Radeon RX480 Strix 8GB
Sound Card
Asus Xonar DSX
Monitor(s) Displays
HP 2709m
Screen Resolution
1920x1080
Hard Drives
Intel 600p M.2 PCIe NVMe SSD 512GB; Intel 335 SSD 240GB ;Western Digital Caviar Black 1TB
OMG!!! im such a ****ing retard i cant even describe it, it actually showed that 1 of the dimms wasnt inserted propper, had reaaaal problems fitting the last dimm in there, even tho the cover snaped to place it wasnt actually fitted at the bottom 100% such a simple error by my part that i never actually noticed
Thank you all for your help tho, u have been most kind : )
My Computer
At a glance
Windows 7 home premium x64QuadCore Intel Core i7-930, 3355 MHz (22 x 133)3x2 GB DDR3-1333 DDR3 SDRAM CorsairATI Radeon HD 5970 (overclocked)
OS
Windows 7 home premium x64
CPU
QuadCore Intel Core i7-930, 3355 MHz (22 x 133)
Motherboard
Asus Rampage II Gene
Memory
3x2 GB DDR3-1333 DDR3 SDRAM Corsair
Graphics Card(s)
ATI Radeon HD 5970 (overclocked)
Sound Card
ATI Radeon HDMI @ ATI Cypress/Hemlock
Monitor(s) Displays
BenQ V2400Eco (HDMI) [24" LCD]
Screen Resolution
1920x1080
Hard Drives
SAMSUNG HD502IJ ATA Device (500 GB, 7200 RPM, SATA-II)
PSU
some crazy good shit i dont remember the name on :P
Case
Cooler master full tower
Cooling
Custom custom custom, oh boy does it work well!
Keyboard
Standard keyboard i stole from mom and dads old pc
What is even funnier is that all of us that posted to help never said the first thing to check: make certain the DIMMs are seated properly. Best to start from the beginning and not assume.
Glad you got it resolved though and it was easy to fix.
My Computer
At a glance
Windows 10 Pro 64 bitCore i7 6700K Skylake 4.0GHzCorsair Vengeance LPX DDR4 32GB 3000MHzAsus Radeon RX480 Strix 8GB
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Wordsworth 5000
OS
Windows 10 Pro 64 bit
CPU
Core i7 6700K Skylake 4.0GHz
Motherboard
Asus Z170 Pro
Memory
Corsair Vengeance LPX DDR4 32GB 3000MHz
Graphics Card(s)
Asus Radeon RX480 Strix 8GB
Sound Card
Asus Xonar DSX
Monitor(s) Displays
HP 2709m
Screen Resolution
1920x1080
Hard Drives
Intel 600p M.2 PCIe NVMe SSD 512GB; Intel 335 SSD 240GB ;Western Digital Caviar Black 1TB