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Corsair Dominator TWIN2X2048-6400C4D Standard Timings Problem


RedRiver

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Hi! Ive just bought me a new system along with Corsair Dominator TWIN2X2048-6400C4D. I have problems getting the timings right.

 

My specs:

ASUS P5N32-SLI

Intel C2D 6600

TWIN2X2048-6400C4D

ASUS GF 8800GTX 768mb

Hiper 580W Type-R

 

Ive set up as much as i can like the testing parameters for Twinx/XMS2-6400C4 (below). Im running the memorys Unlinked from the FSB.

 

MY SETTINGS:

Set to 800mhz

CAS Latency: 4T

(tRCD): 4T

(tRP): 4T

(tRAS): 12T

(tRC): 22T

Command Rate 2T

 

All the other options to AUTO.

 

VDIMM set at 2.1V

 

The computer isnt stabil. I get bluescreens and lockups. I dont think the memorys are faulty. I think the problem might be that all the "AUTO" settings getting wrong. If i leave command rate to "AUTO" the mobo will set it to 1T and it will not boot. I pretty much suck dealing with timings and stuff. Do you know what the problem is and can you tell me the necessery settings for bios.

 

/RedRiver

 

 

Testing parameters for Twinx/XMS2-6400C4:

Twin2x2048-6400C4 Data Sheet

 

Motherboard make and model: Asus P5WD2 or M2N32-SLI Premium/Deluxe

Each pair is tested and packaged together using the following settings:

AI Over Clock Tuner: Manual

CPU External Frequency: Manually set to 200MHz

DDR2 SDRAM Clock: Manually set to 800MHz

PCI Express Freq: Auto

PCI Freq: 33.33

Performance Mode: Standard

DRAM Timing Selectable: Manual

SDRAM CAS Latency: 4T

SDRAM RAS to CAS Delay (tRCD): 4T

SDRAM Row Precharge (tRP): 4T

SDRAM Active to Precharge Delay (tRAS): 12T

SDRAM Write Recovery Time: 5

Write to Precharge Delay: 15 (If it's Listed)

Command Rate: 2T

DDR2 SDRAM Voltage: 2.1

CPU Core Voltage: Auto

FSB Termination V: 1.50 V

MCH Chipset V: 1.65V

ICH Chipset V: 1.20V

All other settings are motherboard defaults.

Maximum DDR2 recommended VDIMM: 2.1 Volts

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Make sure you update to version 0702 of the bios as it fixes some compatibility problems. Flash the bios and reset cmos.

 

Then.

 

Go into the bios, Go to

First: "AI Tuning -> Select Manual"

Second: "Go to System Voltages, Set Voltage for Memory to 2.1v"

Third: Go to Overclocking, Select Memory Timing Schedule. Set timings to 4-4-4-12-2T and Auto for the rest.

Fourth: Go back a 2 screens to AI Tuning and go to FSB and Memory Config. Select Unlinked. Reboot Computer.

Fifth: Go back to "Ai Tuning -> FSB and Memory Config" and select memory speed of 800.

Sixth: Reboot computer and your memory speed is now 800. Easy as pi.

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With the MB you have you need to set the memory Frequency at 667 Mhz and then over clock your CPU.

 

Thanks for the reply!

I cant see why i must lower the performance of my memorys and why i have to overclock my cpu? I dont want to overclock it yet with the stock fan. The memory must be able to run at the advertised speed without touching my CPU. I payed some hard money for them.

 

...update to version 0702... Flash the bios and reset cmos.

 

Then.

 

Go into the bios, Go to

First: "AI Tuning -> Select Manual"

Second: "Go to System Voltages, Set Voltage for Memory to 2.1v"

Third: Go to Overclocking, Select Memory Timing Schedule. Set timings to 4-4-4-12-2T and Auto for the rest.

Fourth: Go back a 2 screens to AI Tuning and go to FSB and Memory Config. Select Unlinked. Reboot Computer.

Fifth: Go back to "Ai Tuning -> FSB and Memory Config" and select memory speed of 800.

Sixth: Reboot computer and your memory speed is now 800. Easy as pi.

 

Thanks for the reply Voxxy. I have done exactly what you said. Exept i dont have version 0702. I have 0602, I will flash my bios and see.

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Ok. Ive flashed my BIOS to 0702. But it will not run as it should. It may be a little better because i could run 3DMark06 a couple of time before crashing down.

Maybe this is a job for ASUS to deal with.

 

Are there any settings i could lighten up without loosing to much performance?

 

/RedRiver

 

 

PS. I dont understand the frase:

but it is hit and miss from what we have seen on the forum
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All voltages are "auto" except Memory which is set to 2.1V.

 

Here is what my voltages are:

 

vcore - 1,24v

memory - 2,14v

1,2v ht - 1,50v

nb - 1,44v

sb - 1,52v

cpu vtt - 1,26v

ddr2 termination - 1,07v

3,3v - 3,28v

5v - 4,91v

12v - 11,71v

 

FSB is set to Unlinked.

FSB is 1066 and memory is set to 800mhz. (currently 667mhz to make it run)

 

 

 

PS. Thats one bad *** rig you got there Yoxxy...

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I think voltages are actually a bit high.

 

1.2VT should be set to 1.2v unless you are increasing the FSB.

 

NB should not be higher than 1.25v as it gets hot and causes instability.

 

CPU VTT is fine.

 

Try actually lowering those two voltages and see if you have better luck.

 

coincidently your rails read exactly the same as mine :). Voltages are mesed up in where they read on this board.

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  • Corsair Employees

That MB is spec'ed at DDR667 not DDR800;

From ASUS Spec for this MB!

http://www.asus.com/products4.aspx?modelmenu=2&model=745&l1=3&l2=11&l3=227

Memory

Dual channel memory architecture

4 x 240-pin DIMM sockets support max. 16GB DDR2 667/533 non-ECC memory

Refer to http://www.asus.com or user manual for ""Memory QVL (Qualify Vendor List)"""

 

And with 4 modules running the modules at Max spec may not be possible, but to be sure its not a failing module I would test them one at a time.

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I have a Extreme striker and i have the same problems with twin2x2048-6400c4pro mem. I think we have the same chipset for mem and mainboard. On 5-5-5 timings all is stable and on 4-4-4 it crashes. I am going to return the mem if this problem is not fixed in a month. I think the problem is the mainboard / bios, lets hope for a quick fix.
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