Jump to content
Corsair Community

ASUS P5Q and TWIN2X2048-6400C4 (2 packs)


Recommended Posts

Buy two weeks ago this MoBo and 2 X TWIN2X2048-6400C4.

Impossible to get a perfect system with 4 MB.

Sometimes it's ok with 3 MB during 2 or 3 hours then blue screen.

Could you please post all the options of AI TWEAKER MENU.


I think I've tried all the possibilities of the bios without finding the correct ones.


If somebody have the same configuration I would be grateful if you can help me to find the correct parameters.


Tks in advance.



Link to comment
Share on other sites

  • Corsair Employees

Some systems require that you lower the memory frequency when using 4 modules due to the load on the memory controller. Please try this:


Clear your BIOS

Reset the memory frequency, timings, and voltage manually

Set your memory controller voltage to 12.5v to 1.4v range, you can try these voltage steps incrementally.


If this is not stable, reduce your memory frequency to 667.

Link to comment
Share on other sites

Download memtest from--->

and extract the ISO image. Burn the ISO image to an CD-ROM disk.

Download CPU-z from

Insert a single stick in the first slot (Closest to the CPU) and enter your BIOS, set to these values:

AI Overclock Tweaker

Ai Overclock Tuner = Manual
CPU Ratio Setting: 8
FSB Frequency = 333
PCIE Frequency = 100
FSB Stap to Northbridge = 333 Mhz
DRAM Frequency = 667Mhz

DRAM Timing Control = Manual

CAS Latency = 4
DRAM RAS# to CAS# Delay = 4
DRAM RAS# Precharge = 4
DRAM RAS# Activate to Precharge = 12
RAS# to RAS# Delay = Auto
Row Refresh Cycle Time (tRFC) = 60 
Write Recovery Time = Auto
Read to Precharge Time = Auto
All other to Auto

DRAM Static Read Control = Disabled
DRAM Read Training = Disabled
Mem. OC Charger = Auto
AI Transaction Booster = Disabled
Relax Level = 9
CPU Voltage = Auto
CPU PLL Voltage = Auto
FSB Termination Voltage = Auto
DRAM Voltage = 2.1v
NB Voltage = 1.30v
SB Voltage = Auto
PCI-E SATA Voltage = Auto

Loadline Calibration = Auto
CPU Spread Spectrum = Disabled
PCIE Spread Spectrum = Disabled
Clock Over-Charging Voltage = Auto
CPU GTL Volage Reference = Auto
NB GTL Voltage Reference = Auto

Legacy USB = Disabled for Memtest, Enabled afterwards.

Shut the system down. Boot to the Memtest CD with that single stick and allow for two full paasses. Shut the system down. Remove the first stick and insert it in slot two. Repeat memtest. Shut the system down. Remove the first stick and insert it into slot three and repeat memtest. Do the same for the last slot. You have now tested one stick and all four slots. Shut the system down and remove the first stick. Insert the second stick in slot one. Retest. Shut the system down and remove the second stick and insert the third stick in slot one. Repeat Memtest. Do the same with the last stick. You have now tested all four sticks.


Now test for the Dual Channel Mode function of the memory controller. Insert a stick in slot one and three and memtest. Remove the set and insert the second set in slot two and four and memtest.


Finally, insert a stick in slot one and slot three, a stick in slot two and slot four and repeat Memtest. If Stable enter Windows and post screenshots of CPU-z's CPU, Memory and SPD tabs.

Link to comment
Share on other sites


This topic is now archived and is closed to further replies.

  • Create New...