[SOLVED] Only half ram are usable?

[sub-80]

Hello Just add 8 gb ram, I wanted to get the exact ram but accidentally got Ripjaw x it looks the same has the same frequency 1333mhz and the cas latency 9, but nvidia geforce experience says that only 8gb are usable and also in the bios??
Why is that?

CPU: intel Core i7-875K, 2.93 GHz (3.6 GHz Boost) with 8 MB Cache, Currently clocked @ 3.78GHz
CPU Cooler:Thermaltake water 3.0 Extreme
Motherboard:ASUS LGA 1156/ Intel H57/ DDR3/ 2133OC/ USB3.0 & SATA 6Gb/s - ATX Motherboard P7H57D-V Evo
Memory:16gb TOTAL
G.SKILL RIPJAW 8GB (2X4GB ) DDR3 PC3-10666C9 1333MHZ DUAL CHANNEL KIT
G.SKILL RIPJAW X 8GB (2X4GB ) DDR3 133MHz
HDD : 2 of Western Digital 640 GB Caviar Black SATA 7200 RPM 64 MB Cache Bulk/OEM Desktop Hard Drive WD6402AAEX
Graphics Card: Gigabyte GTX 780 Ghz edition
Monitor:
-LG 23” 3D Ready 120Hz 1080p LCD Response time: 3ms (W2363D-PF)
-LG LCD TV 32" response time:5ms, Freq:120Hz, 1080p
Peripherals: LG Electronics 10X Internal SATA BD-RE WH10LS30
-Tp-Link TL-WN951N 300 Mbps Wireless-N PCI Card - 3 antennas
Power supply: Thermal take Toughpower 1500W
Case: Thermaltake Chaser MK-1

Solution: Placed the old Dimms in one channel and the new Dimms in the second channel. Mystery Solved. 😛

 

[Morbus]

What is actually the problem? You have 8GB or RAM and your system is telling you you have 8GB of RAM...

 

[sub-80]

I currently have 16gb ram
8gb gskill ripjaw and 8gb gskill ripjaw x. But bios and nvidia experience are saying that only 8gb is usable. They both 1333mhz

 

[Deders]

What happens if you swap the dimms into different slots?

 

[sub-80]

I guess I can try different combinations and see what happens

 

[XavierMace]

Run CPU-Z, what does it see for memory?

 

[denis280]

Run CPU-Z, what does it see for memory?

This. and did you try the new ram only.

 

[sub-80]

This. and did you try the new ram only.

CPU-z is giving me 16gb. No i didn't try the new alone. the first thing i did i placed the new ram ion place of the old ram which are DIMM_A1 and DIMM_B1 and place old ram in DIMM_A2 and DIMM_B2. I still haven't tried moving the ram to different locations.