NF4 Ultra 939 Memory problem

[will808]

Hi,

 

Hope someone can help me here - I probably won't be able to give all the needed details straight off as I'm not too sure what the problem is, but please ask anything you need to know and I'll give the info.

 

I have had my 939 NF4 Ultra board running 2 x 512mb Crucial DDR400 PC3200 for about 2 years, and decided I need to upgrade to 4 x 512mb. I bought the added RAM from the same supplier by clicking on the link of what they say I originally purchased - certainly it looks exactly the same as far as I can tell.

 

The problem is that the mobo is having none of it. I have tried everything I can to see if I can isolate a bad stick, but it seems that every combination of new and old works if I run two sticks either in slots A and B or in A and C. If I add anything else to it, it won't post.

 

I remember I had some issues originally where the mobo manual said that two sticks had to go in the yellow slots. I was able to boot then, but the pc would crash under any load. I got around this by using the orange slots (B&D).

 

I know these boards are very picky about RAM placement and type, so I'm hoping there is something I can do to sort this out - otherwise it's back to the ASUS

 

Thanks for any help, and like I say, if you need more info, please just shout...

[SpeedEuphoria]

These boards dont like 4x512 much, you need to use 2t and normally change the datadrive strength and drive strength till you find what works. 2x1GB is much easier to use.

[will808]

Thanks for the reply - sorry I don't understand, what is 2t, data drive strength and drive strength - is this something I can do in the BIOS if I boot with just 1 stick?

 

Since I've got the 4 x 512 i might as well mess around and try it.

[SpeedEuphoria]

1T or 2T is set as "CPC enable ore disable" so you need to set as CPC disable.

Its in the BIOS as are the other settings.

Heres a good thread with some info http://www.xtremesystems.org/forums/showthread.php?t=177808

[Sharp]

Hello,

 

If you have a winchester core CPU you must set the memory voltage to 333DDR.

 

Enter the BIOS.

GENIE BIOS Setting

>DRAM Configuration..................Press Enter = New Menu

FSB BUS Frequency....................200

LDT/FSB Frequency Ratio..............X 5.0

LDT BUS Transfer Width...............16 16

CPU/FSB Frequency Ratio..............AUTO

PCI eXpress Frequency................100Mhz

K8 Cool 'n' Quiet Support............Disable

Cool 'n' Quiet MAX FID...............AUTO

CPU VID StartUp Value................StartUp

 

CPU VID Control......................AUTO

CPU VID Special Control..............AUTO

LDT Voltage Control..................1.20 V

Chip Set Voltage Control.............1.50 V

DRAM Voltage Control.................2.70 V

 

Run MemTest86+.......................Enabled, disable later

GENIE BIOS Setting >DRAM Configuration

DRAM Frequency Set (MHZ).............166 (DRAM/FSB:5/06)

Command per clock (CPC)..............Disabled

Cas latency (tCL)....................2.5

RAS to CAS delay (tRCD)..............3

Min RAS active time (tRAS)...........8

Row precharge time (tRP).............3

Row cycle time (tRC).................11

Row refresh cycle time(tRFC).........14

Row to Row delay (tRRD)..............3

Write recovery time (tWR)............2

Write to read delay (tWTR)...........AUTO

Read to write delay (tRWT)...........AUTO

Refresh period (tREF)................1560

Write CAS latency (tWCL).............1, may not be in your BIOS

DRAM Bank Interleave.................Enabled

 

DQS Skew Control.....................AUTO

DQS Skew Value.......................0

DRAM Drive Strength..................AUTO

DRAM Data Drive Strength.............AUTO

Max Async Latency....................6ns

Dram Response........................Normal

Read Preamble Time...................5ns

Idle Cycle Limit.....................AUTO

Dynamic Counter......................AUTO

R/W Queue Bypass.....................AUTO

Bypass Max...........................AUTO

32 Byte Granularity..................AUTO