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Asus P5Q Deluxe with 2 pairs of TWIN2X4096-8500C5D


Kni8_2k

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Hi Guys,

 

I've been reading this forum all day, and always find somewhat similar setups that are jsut different enough for me to now know if those settings are going to harm my system.

 

I bought this system to do some cpu/memory intensive 3d Apps and I am having SEVERE stability issues. I have not done any overclocking or bios changes. the syste seems to be stable when not under stress but as soon as the momory usage goes up I get the Bluee screen of Horor.

 

so far based on what I've read I have just changed the bios to a Dram speed of 835 MHZ with a Voltage of 2.2 from its stock 1.8V on this Mb.

 

Most of my blue screen errors are MEMORY_MANAGEMENT,

after a few chagnes to the bios I graduated to a PFN_LIST_CORRUPT

 

so I quickly changed back what I did...

 

I am running MEMtest right now and so far have had no errors.

 

I'm at my witts ends and am afraid I'll be making bios changes that may harm the system :-(

 

I would welcome any advice you have.

 

Cheerrs.

Ali

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update :

 

MEmscope errors found during the 32Bit Shifting Data Test (7/8)

 

I can't turn off the Legacy USB beause I only have a Usb keyboard ..

 

so are there problems due to the Legacy USB bieng turned on or is the memory actually Faulty.

 

Cheers.

Ali

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You can use Memtest. Just set the boot to the memtest CD and allow to test. Then shut the system down manually with the power button after a few passes. Use the Memtest86+ Version 2.01 posted here.

 

You are populating four DRAM slots and this changes the dynamic of the system. You are advised to drop the DRAM bandwidth and raise the Northbridge Memory Controller voltage +.2v to achieve stability with a four DRAM slot population.

 

Download memtest from--->

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

Download CPU-z from
.

Enter your BIOS, Load Setup Defaults, Save Setup Defaults and set to these values:

AI Overclock Tweaker

Configure System Performance Settings

Ai Overclock Tuner = Manual
CPU Ratio Setting = 8.5
FSB Frequency = 333
PCI-E Frequency = 100
FSB Strap to Northbridge = 333
DRAM Frequency = Manual
DRAM CLK Skew on Channel A1 = Auto
DRAM CLK Skew on Channel A2 = Auto
DRAM CLK Skew on Channel B1 = Auto
DRAM CLK Skew on Channel B2 = Auto

DRAM Timing Control = Manual
DRAM Frequency = DDR2-800
DRAM Command Rate = 2N
DRAM Timing Control = Manual
CAS# Latency =  5
RAS# to CAS# Delay = 5
RAS# PRE Time = 5
RAS# ACT Time = 15
Row Refresh Cycle Time (tRFC) = 62
All Else to Auto

DRAM Static Read Control = Auto
DRAM Read Training = Auto
Mem. OC Charger = Auto
AI Transaction Booster = Auto

CPU Voltage = Auto
CPU PLL Voltage = Auto
FSB Termination Voltage = Auto
DRAM Voltage = 2.1v
NB Voltage = 1.40v
SB Voltage = Auto
PCI-E SATA Voltage = Auto

Loadline Calibration = Auto
CPU Spread Spectrum = Disabled
PCIE Spread Spectrum = Disabled

Clock Over-Charging Voltage = Auto
Load Line Calibration = Auto
CPU GTL Voltage Reference = Auto
NB GTL Voltage Reference = Auto

Memory Remap - Enabled

Legacy USB = Disabled (For Memtest, Enabled After Memtest)

 

Run Memtest for two full passes. When assured of stable DRAM, then enter Windows and Run CPU-z and post screenshots of CPU-z's CPU, Memory and SPD tabs. Then attempt to repeat the instability issues.

 

Please post back here even if you are stable as we can then move to optimize your stable system. There's not use trying to optimize an instable system.

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here are the CPUZ results - I have not been able to run the memtest file. I burnt it to a CD and have CD boot enabled but the CD wont start and it will go directly to the OS.

 

I will keep trying and let you know.

once I get that going I will redo the Stress test to check stability.

 

Thanks again for your help.

cpuz_cpu.jpg.4c492459bc93161954c381514235e3b1.jpg

cpuz_cache.jpg.75284809c1c1b08bc4c45633f1a4d79a.jpg

cpuz_mainboard_3.jpg.ff777bc6e9406fcf86cf2214c214b2c5.jpg

cpuz_memory.jpg.7e281dc1200ccff7f80f7a040dd3cc4f.jpg

cpuz_spd.jpg.7139f33fc55306f2e9ea9e25ddc2d91e.jpg

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I finished running the memtestx86+ from the CD 2 Full passes and 2:30 Hours laeter. No errors.

 

I am currently doign the stress test in Vista 64 Bit with 32bit Maya running in x86 mode with compatibility mmode set to windows xp sp2.

 

will update.

 

Cpuz settings look the same.

and I have not managed to change the command rate from 2t to 2N.

 

another thing, in the bios Ram remaping is on and is set to almost 4 GB please let me know that is ok as well.

 

Happy thanks giving, and Thank you for helping me so far.

Optimization is a luxury, right now stability is the most important thing for me.

 

cheers.

Ali

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well in the stress test, it has gone past the point where it would normally crash !!!

YOU my man, are a genious ! this increase in stability is priceless.

 

Thank you!

 

please let me know if there is anything I can do to optimize now and still keep the system stable.

 

Cheers.

Ali.

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  • 6 months later...

Hi there, just wanted to let you know.

 

I did a recent Bios Update and fell into the same stability issues. then I had remembered this site.

 

I've now reentered almost all the values into the latest bios, with exception of a couple that were not there any more.

 

Like the DRAM Command Rate,

and the Row Refresh Cycle time which could only be set to 60 or 65, not 62.

 

So far this is stable. again.

 

If you have any recomendations for Tweaks to make for optimization, I would Appreciate it alot.

 

Thanks,

Ali.

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  • 9 months later...
here are the CPUZ results - I have not been able to run the memtest file. I burnt it to a CD and have CD boot enabled but the CD wont start and it will go directly to the OS.

 

I will keep trying and let you know.

once I get that going I will redo the Stress test to check stability.

 

Thanks again for your help.

 

I have TWIN2X4096-8500C5D - Four modules installed in Asus P5Q Pro Turbo. I have completely the same CPU-Z informations, because I have also the same CPU. The problem is, that Asus P5Q mainboards are not compatible if more than one module is installed. This is at this Corsair module written in mainboard manual! So for full speed support we must change MB or RAM...

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  • Corsair Employees
The kit should work in the motherboard but when using two kits together you would need to slow the memory frequency down. It is a limitation of the memory controller in the northbridge.
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