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Cycle Refresh Time or trfc


L4d

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I got a pair of 2x2gb 1066 c5 Dominator running @ DDR2-800C dual channel Unganged (Ganged fails Prime95 after 58 minutes). CR 1, 105 and 75ns tRFC, tWR 3, tWTR 2, tRRD 2, and tRTP 2 @ ~2.1 volts.

 

Do 2gb modules need a 195ns tRFC? Should I try 127.5ns in all spots or 127.5/105? 127.5ns is needed to boot with 1066mhz.

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That is a chipset specific setting and like you have done just experiment with the settings to keep it stable, and with 4 modules the next lower speed grade would be suggested and increase the NB/MCH/SPP Voltage to +.2 Volts over default.
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  • 2 weeks later...

Thank you for making this post, L4D !

 

my mind has been hellbent on finding the issue with my PC since i upgraded my ram and a new GFXcard since the old one blew up i have had exactly the same issue as you.. i play this MMORPG called Darkfall Online, and every 30-60 min i get a 3-5 sec freeze.. and then it unfreezes again.. ive been thinking it was my ram for quiete awhile now since i had major issues just getting my 4 sticks going in the first place, had to upgrade my motherboard bios just to get the sticks to work without BSOD.. (ive tried to exclude the GFX card by testing multiple drivers etc.. but still same result with the 3-5 sec freezes... )

 

 

my current specs are this:

 

8GB 4x2gb configuration memory installed.. Corsair (the memory type info is in my specs profile)

http://img39.imageshack.us/img39/3523/memoryj.png

ive put the MCHcontroller to have a slight overvoltage of +0.1V

 

i have a slight overclock on my CPU its at 3.2ghz @stock is 2.4ghz.. everything passes orthos prime for a long time.. and so does the memory.. ive tested the memory with the Win7 memory test utility and no errors are detected...

 

 

any input would be greatly appriciated..

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Magnus1983

With 4 modules I would suggest setting the memory frequency at DDR667 and set the memory Voltage to 2.1 Volts and set the NB/MCH/SPP Voltage to +.2 Volts as well and test the system with http://www.memtest.org. In addition, with some MB's (Mostly ASUS) you have to disable legacy USB in the bios when running any memory test.

 

Posted By L4d

I have currently Auto for all four places of cycle refresh. There are 2 DIMMs for ram.

Default Voltage is 1.92; I read these modules are able to run @ 1.9 volts and 1066 5-5-5-15!

800 mhz Ganged and Bank Interleaving; 4-4-4-12-24 all else are Auto. Command Rate is defaulted @ 2T.

CPU multiplier is Auto @ 2.8 ghz.

A: The memory Voltage should be set to 2.1 Volts for any DDR1066 module from us. And if you are over clocking or using more than one set of modules you may need to manually set some other settings as well. But it would be best to test the modules one at a time with http://www.memtest.org to make sure one is not failing.

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  • 6 months later...
  • 2 weeks later...
Thank you for making this post, L4D !

My current specifications are:

8GB 4x2gb configuration memory. Corsair (the memory type info is in my specs profile)

http://img39.imageshack.us/img39/3523/memoryj.png

I've put the MCHcontroller to have a slight overvoltage of +0.1V

Everything passes orthos prime for a long time. I've tested the memory with the Win7 memory test utility and no errors are detected.

 

Is the +.1v needed to make your RAM stable?

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"Note: Due to AMD AM3/AM2+ CPU limitation, DDR2 1066 or above speed is only supported by 1 dimm per channel. Please run 1 module of 1066 memory on this board"

 

This is with GA-MA7LM-S2H:

http://www.gigabyte-usa.com/Products/Motherboard/Products_Spec.aspx?ClassValue=Motherboard&ProductID=3190&ProductName=GA-MA78LM-S2H

This link clearly states Dual Channel 1200mhz+/1066/800!!

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