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CML8GX3M2A1600C9W — Tested vs. SPD


Treefugger

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Hello,

 

Re. Vengeance Low Profile 2x4GB White

 

I searched the forums for an answer before posting. Some threads discussed voltages but didn't answer the question below.

 

Might someone advise me on why the tested voltage for these is 1.35V while the SPD voltage is 1.5V? This is my first ever system build and I don't understand why the tested voltage would be lower than what they're specified for. I noticed that this is not the case for the red, black, and blue versions, which all have tested and SPD voltages of 1.5V. If I have misunderstood something, I'd very much appreciate clarification.

 

Cheers, Treefugger

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Might someone advise me on why the tested voltage for these is 1.35V while the SPD voltage is 1.5V? This is my first ever system build and I don't understand why the tested voltage would be lower than what they're specified for. I noticed that this is not the case for the red, black, and blue versions, which all have tested and SPD voltages of 1.5V. If I have misunderstood something, I'd very much appreciate clarification.

I'm not sure how they do that either. But you are correct, it is only the LP whites that are this way. It has to do with the chips used . FWIW, I have seen plenty of cases where those have had to be run at 1.5 instead of the 1.35v they are advertized at , depending on the system

 

But no, you didn't miss anything. I'm sure Ram Guy could clarify this even more for you.

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While I wait for Ram Guy to clarify, would you mind explaining the cases where you have seen that they had to be run at 1.35V? Was it to maintain stability?

 

I think more questions are coming. Are the chips different in the white? And if I had to run them at 1.5V, wouldn't that void my warranty?

 

P.S. Do I need to go find Ram Guy or will he find this thread?

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I think more questions are coming. Are the chips different in the white? And if I had to run them at 1.5V, wouldn't that void my warranty?

Depens on the CPU...amd vs Intel, what model CPU and so on.... and no running them at 1.5v would not void your warranty. The modules are good up untill 2.0v before voiding the warranty or you would need to be concerned with damage.

 

Yes, as previously stated the chips used would be different. There is nothing really that says you have to run them at 1.35v,just that on some systems that can use the low voltage memory they would be compatible and should be stable at 1.35v. Most other systems may require slightly more voltage.

 

P.S. Do I need to go find Ram Guy or will he find this thread?

Corsair is closed on the weekends so it might be late monday or tuesday if they have a large backlog from the weekend , but he will eventually see this.

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  • Corsair Employees
The SPD is what the memory modules use by JEDEC standard for DDR3-1333 whereas the test spec is what the XMP profile is. These modules are designed to run at 1.35V but not all systems can use them at this voltage (it'll vary depending on your Intel CPU since they only recommend 1.5V for DDR3). Using these modules at 1.5V will not void your warranty as you can go up to a maximum of 1.65V before you damage the memory controller on Intel CPU's.
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Add more memory, eh? How would that help to stabilise it? Thanks for your patience.

No, more voltage. You would have to set them amnually to 1.35v first. If your system works as it should then it's fine. But if you start getting BluScreens or crashes, then you will have to add more voltage and set them to 1.5v

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