12 gb of ram dropped to 10 now 8

[riecus]

I have 12 gb of G.SKILL DDR3 2000 (PC3 16000) Desktop Memory Model F3-16000CL8D-4GBPIS64225456. Windows was reading 12 gb then at next reboot it only showed 10 now it shows 8. CPUz reads all 12. I have checked each stick in different slots and have check each slot. everything is fine but it won't read all 12 gb anymore. major drop in performance when you lose 4gb its very noticable.

my system is as follows.


Asus Rampage iii extreme mobo
i7 960 cpu bloomfield
12 gb G. Skill ddr3 2000 (PC3 16000)
2 EVGA GeForce GTX 460 superclock video cards
1200 watt COOLER MASTER Silent Pro Gold Series modular psu
COOLER MASTER Intel Core i7 compatible V8 CPU cooler
Western Digital VelociRaptor 300GB 10000 RPM SATA 3.0Gb/s
Seagate Barracuda 750GB 7200 RPM SATA
LG Blu-ray Burner
COOLER MASTER HAF X tower

[GSKILL TECH]

What do you have the QPI/DRAM Voltage set to? Post up screen shots of BIOS, it may be the easiest way to troublshoot. Also, there is a sticky about this on the main DDR3 page that you may want to look into.

Thank you
GSKILL TECH

[riecus]

Here info of the bios. I looked at the other site that you posted and tried some of the settings. i am a noob when it comes to oc the ram. when i installed the ram the first time and booted the computer with factory settings it read 12 gb of ram. next day it only read 10 gb then that evening it read 8gb. i did not change anything in the bios when it did this. hope this helps some.

Target CPU Frequency 3192MHz
Target DRAM Frequency 1066MHz

LN2 Mode: Disabled***
QPI Loadline Calibration: Enabled***

Sync Mode [Enabled]
AI Overclock Tuner [Auto]
OC From CPU level Up [Auto]
CPU Ratio Setting [auto]
CPU Turbo Power Limit [Disabled]

>CPU Configuration----------------------------
CPU Ratio Setting [auto]
C1E Support [Enabled]
Hardware Prefetcher [Enabled]
Adjacent Cache Line Prefetcher [Enabled]
Intel(R) Virtualiyation Tech [Enabled]
CPU TM Function [Enabled]
Execute Disable Bit [Enabled]
Intel(R) HT Technology [Enabled]
Active Processor Cores [All]
A20M [Disabled]
Intel(R) SpeedStep(TM) Tech [Enabled]
Intel(R) C-STATE Tech [Disabled]
----------------------------------------------

DRAM Frequency [AUTO]
UCLK Frequency [AUTO]
QPI Link Data Rate [AUTO]

Memory Configuration Protect [Disabled]

>DRAM Timing Control--------------------------
CAS# Latency 8 [AUTO]
RAS# to CAS# Delay 8 [AUTO]
RAS# PRE Time 8 [AUTO]
RAS# ACT Time 20 [AUTO]
RAS# to RAS# Delay 4 [AUTO]
REF Cycle Time 59 [AUTO]
WRITE Recovery Time 8 [AUTO]
READ to PRE Time 6 [AUTO]
FOUR ACT WIN Time 20 [AUTO]
Back-To-BackCAS# Delay 0 [Auto]

Timing Mode 2N [1N]
Round Trip Latency on CHA 50 [AUTO]
Round Trip Latency on CHB 52 [AUTO]
Round Trip Latency on CHC 0 [AUTO]

WRITE To READ Delay(DD) 5 [Auto]
WRITE To READ Delay(DR) 5 [Auto]
WRITE To READ Delay(SR) 14 [Auto]
READ To WRITE Delay(DD) 10 [Auto]
READ To WRITE Delay(DR) 10 [Auto]
READ To WRITE Delay(SR) 10 [Auto]
READ To READ Delay(DD) 7 [Auto]
READ To READ Delay(DR) 6 [Auto]
READ To READ Delay(SR) 4 [Auto]
WRITE To WRITE Delay(DD) 7 [Auto]
WRITE To WRITE Delay(DR) 7 [Auto]
WRITE To WRITE Delay(SR) 4 [Auto]
----------------------------------------------

CPU Differential Amplitude [Auto]
CPU Clock Skew [Auto]
IOH Clock Skew [Auto]
------------ Extreme Engine Digi+ ------------
Digi+ PWR Mode [T-Balanced]
PWR Volt. Control [Auto]
Load-Line Calibration [Auto]
CPU Voltege OCP [Enabled]
CPU PWM Frequency [Auto]

Extreme OV [Disabled]
Extreme OC [Auto]

CPU Voltage 1.151 [Auto]
CPU PLL Voltage 1.819 [Auto]
QPI/DRAM Core Voltage 1.197 [Auto]
DRAM Bus Voltage 1.508 [Auto]

>DRAM REF Voltages----------------------------
DRAM DATA REF Voltage on CHA [Auto]
DRAM CTRL REF Voltage on CHA [Auto]
DRAM DATA REF Voltage on CHB [Auto]
DRAM CTRL REF Voltage on CHB [Auto]
DRAM DATA REF Voltage on CHC [Auto]
DRAM CTRL REF Voltage on CHC [Auto]
----------------------------------------------

IOH Voltage 1.164 [Auto]
IOH PCIE Voltage 1.508 [Auto]

ICH Voltage 1.111 [Auto]
ICH PCIE Voltage [Auto]

---------- Spread Spectrum Control -----------
CPU Spread Spectrum [Auto]
DRAM Spread Spectrum [Auto]

***on-board jumper dependant

[GSKILL TECH]

Well you purchased 3 kits, so they probably won't work together. Try setting the memory lower like DDR3-1600 CL7, raise QPI/DRAM Voltage accordingly, then see if that helps. If not, just send the memory in for a 12GB kit.

Thank you
GSKILL TECH

[riecus]

dang. i wanted to get a 12 gig kit but newegg didn't sell 12 gb kit for this kind. am i wrong in thinking that if a 3 set kit wouldn't work then it shouldn't have showed 12 gb then 10 then 8, it should have just showed 8. i will try setting it lower and see what it does.

[riecus]

ok problem solved i feel like a complete moron. i went through the process of checking each stick and checking every slot. Couldn't find anything wrong. witth all the ram inserted it would read 8 out of the 12 gb. the fan that comes with this ram clips on so everytime i put it on it would unlatch ram. when i pulled it off to check the ram it secured it again. so if you have the same ram with that fan and not all of it is being read then make sure it is all secure leave fan off the boot the computer see if it reads it all. then you canput the fan on if you want.



even the most experienced can get baffled

[GSKILL TECH]

It happens! At least you figured it out. =)

Enjoy!

Thank you
GSKILL TECH