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TWIN2X4096-8500C5DF & C5D Mixing (not-OC)


NazcaC2

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I currently have one TWIN2X4096-8500C5DF in my system (see specs) and just put another order in for TWIN2X4096-8500C5D and don't plan on overclocking it. I know it's suggested not to mix RAM models and revisions. Will it presumably work fine or is it another dice throw?
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Running 4 modules at 1066 seems to be difficult from what tends to be said around here. DDR2-800 is stable for most people, but 1066 is a big step.

 

Like you said, it's a dice throw. I don't anything about Nvidia chipsets and their potential to run at 1066 with 4 DIMMS, but some googling might tell you if other people have had success, and give you an idea of the success rate. Then it's just your decision if you want to give it a shot.

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They just came in today and they appear to be version 2.1's and my others are 1.1's. I have them installed and so far so good (2GB x 4 @ Auto). I'm going to set up a Memtest momentarily.

 

Update: Zero errors appeared. So, I'll be sticking with both pairs.

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FYI!

 

With 4 modules I would suggest setting the memory frequency at DDR667 or DDR800 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.

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  • 3 weeks later...

I think I have the same problem. Did you tested the new pair alone, just the 2 ver2.1, without the old ones?

 

I've got a new pair this week. My current is ver1.1 and the new one is ver2.1. When I put any of the new items the PC won't boot, I just get a black screen.

 

Any ideas?

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Oops, my mistake, not 0.5 V increments, lol. I don't see where NB Voltage is located though. Here are my attachments.

 

 

http://avalanchemedia.ca/other/bios%20pics/DSC_0043-sm.jpg

 

http://avalanchemedia.ca/other/bios%20pics/DSC_0044-sm.jpg

 

http://avalanchemedia.ca/other/bios%20pics/DSC_0045-sm.jpg

 

http://avalanchemedia.ca/other/bios%20pics/DSC_0047-sm.jpg

 

http://avalanchemedia.ca/other/bios%20pics/DSC_0049-sm.jpg

 

http://avalanchemedia.ca/other/bios%20pics/DSC_0050-sm.jpg

 

http://avalanchemedia.ca/other/bios%20pics/DSC_0053-sm.jpg

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With your MB the memory Voltage and NB SPP Voltage would be the main things to set properly and the SPP Voltage you will add .2 Volts to the default normally its 1.1 or 1.3 Volts.

 

So with your MB you would set the memory Voltage to whats printed on the modules or no more than 2.1 Volts and set the NForce SPP to 1.5 Volts

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Ok, so doing all these steps (memory voltage to 2.1 Volts and SPP to 1.5 Volts) - what does this do compared to keeping things on Auto. What's the benefit and are these values fine for my motherboard and won't damage anything in the long run?

 

I've set it to those values and kept tRAS at 18 as suggested. One of the fans have sped up I've noticed.

 

Should I do a Memtest?

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If the system is stable then I would not worry about it. and I am not sure what you are asking

"what does this do compared to keeping things on Auto. What's the benefit and are these values fine for my motherboard and won't damage anything in the long run?"

These are the suggested settings in this configuration, you are welcome to try anything you like but that would be our suggestion in this configuration.

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