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Another 'only 4GB of 6GB recognized' thread.


Boatski

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With a default BIOS 6GB of RAM is recognized, but runs at 1066MHz. Once I up it to 1600MHz, only 4GB is recognized.

 

BIOS and Windows shows 4GB. CPU-Z shows 6GB.

 

RAM: TR3X6G1600C9

 

CPU-Z shows 6GB installed. Windows7 Ultimate 64bit and BIOS shows 4GB.

 

Here's what I've done so far:

1. Removed RAM, cleared CMOS, installed RAM. BIOS shows 6GB running @ 1066. As soon as I bump it to 1600, only 4GB is recognized.

 

2. Followed the eva2000's guide and set BIOS settings accordingly. No change there, still 4GB @ 1600.

 

3. I loosened the screws on my heatsink. First by 1/2 turn on all 4, no change. Then by 1 turn, no change.

 

4. I ran Memtest86+ through 9 passes with all 3 sticks installed. Memtest only read 4GB, but 0 errors were returned.

 

5. Put 1 stick of RAM in each slot and tested all 3 sticks. All of them read 2GB in every slot.

 

6. Enabled XMP, which set voltages as well. Still only shows 4GB.

 

This is the BIOS settings I've used:

****************************

AI Tweaker

****************************

 

Ai Overclock Tuner........... = [Manual]

CPU Ratio Setting............ = [Auto]

Xtreme Phase Full Power Mode. = [Enabled]

BCLK Frequency............... = [133]

PCIE Frequency............... = [100]

DRAM Frequency............... = [1600 Mhz]

UCLK Frequency............... = [3200 Mhz]

QPI Link Data Rate........... = [Auto]

 

CPU Voltage Control.......... = [Manual]

CPU Voltage.................. = [Auto]

CPU PLL Voltage.............. = [1.80]

QPI/DRAM Core Voltage........ = [1.25000]

IOH Voltage.................. = [1.10]

IOH PCIE Voltage............. = [1.50]

ICH Voltage.................. = [1.10]

ICH PCIE Voltage............. = [1.50]

DRAM Bus Voltage............. = [1.65]

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]

 

Load-Line Calibration........ = [Auto]

CPU Differential Amplitude... = [Auto]

CPU Clock Skew............... = [Auto]

CPU Spread Spectrum.......... = [Auto]

IOH Clock Skew............... = [Auto]

PCIE Spread Spectrum......... = [Auto]

 

C1E Support.................. = [Enabled]

Hardware Prefetcher.......... = [Enabled]

Adjacent Cache Line Prefetch. = [Enabled]

Intel® Virtualization Tech. = [Enabled]

CPU TM Function.............. = [Enabled]

Execute Disable Bit.......... = [Enabled]

Intel® HT Technology....... = [Enabled]

Active Processor Cores....... = [All]

A20M......................... = [Disabled]

Intel® SpeedStep Tech.. = [Enabled]

Intel® C-STATE Tech........ = [Disabled]

 

*******************

DRAM Timing Control

*******************

 

1st Information:

DRAM CAS# Latency............ = [9]

DRAM RAS# to CAS# Delay...... = [9]

DRAM RAS# PRE Time........... = [9]

DRAM RAS# ACT Time........... = [24]

DRAM RAS# to RAS# Delay...... = [AUTO]

DRAM REF Cycle Time.......... = [88]

DRAM WRITE Recovery Time..... = [AUTO]

DRAM READ to PRE Time........ = [AUTO]

DRAM FOUR ACT WIN Time....... = [Auto]

DRAM Back-To-Back CAS# Delay. = [Auto]

 

2nd Information:

DRAM Timing Mode............. = [1N]

DRAM Round Trip Latency on CHA = [AUTO]

DRAM Round Trip Latency on CHB = [AUTO]

DRAM Round Trip Latency on CHC = [AUTO]

 

3rd Information:

DRAM WRITE To READ Delay (DD) = [AUTO]

DRAM WRITE To READ Delay (DR) = [AUTO]

DRAM WRITE To READ Delay (SR) = [AUTO]

DRAM READ To WRITE Delay (DD) = [AUTO]

DRAM READ To WRITE Delay (DR) = [AUTO]

DRAM READ To WRITE Delay (SR) = [AUTO]

DRAM READ To READ Delay (DD) = [AUTO]

DRAM READ To READ Delay (DR) = [AUTO]

DRAM READ To READ Delay (SR) = [AUTO]

DRAM WRITE to WRITE Delay (DD)= [AUTO]

DRAM WRITE to WRITE Delay (DR)= [AUTO]

DRAM WRITE to WRITE Delay (SR)= [AUTO]

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Do you have access to another system in which to test your CPU or RAM? Any spare RAM or a buddy with RAM to test in your system? Is there a local PC shop that could help? It sounds as if you definitely have a bad CPU, MOBO. or bad module. The problem is determining which.
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Have you checked the cpu socket for bent pins?

 

I have investigated this for some time now on otter forums also, and it seems to be a common problem.

 

Yous a magnifying glass and god light an check all the pins in the socket.

 

I have also seen that the default bios voltages is often sett a little low, and this is creating a lot of strange behavior on the system.

 

I see you have set the bios template after the guide in the i4memory forum so your voltages should be within spec.

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Have you checked the cpu socket for bent pins?

 

I have investigated this for some time now on otter forums also, and it seems to be a common problem.

 

Yous a magnifying glass and god light an check all the pins in the socket.

 

I just got home and this is my plan. If a pin IS bent, is it ok to bend it back or would that be something under warranty?

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After checking the pins for an hour, I found nothing to be wrong that I could see. I'm going to return the RAM and purchase TR3X6G1600C8D.

 

When I first booted up, I set the profile to XMP. Once Windows loaded 6GB was recognized. Then, after a reboot, it's back to 4GB.

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