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LGA1366 RAM-CPU Voltage link

post #1 of 5
Thread Starter 
I've tried searching for this, but can't find a clear answer - sorry if this question has been asked a million times before rolleyes.gif

On my sig rig (as an example), if my clock speeds & voltages are all set to defaults, what will happen to my CPU voltage if I pull out my 1.5v RAM and drop in 1.65v sticks instead?

I want to move to 1600MHz memory, and would like to stay at CL9 or lower, which invariably needs 1.65v (or more).

I know there's a link between the CPU and RAM voltages, but I have no idea what that link is. Help please! confused.gif
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Vader
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post #2 of 5
If you voltages are on auto for all your settings, then bios will readjust accordingly to your new sticks.

QPI/VTT needs to be with 0.5v of the ram voltage, or you'll damage the IMC(memory controller) of the cpu.

eg. 1.15v VTT and 1.65v ram.
post #3 of 5
It's called the QPI or VTT at a guess.

And you shouldn't need to change any voltages etc if you've got them on auto.

You want to stay below 1.64v on memory as well.
post #4 of 5
Thread Starter 
Quote:
Originally Posted by compuman145;15392847 
You want to stay below 1.64v on memory as well.
doh.gif
So why is there so much 1.65v RAM out there?
Quote:
Originally Posted by compuman145;15392847 
And you shouldn't need to change any voltages etc if you've got them on auto.

So if I get RAM that's rated at 1600MHz, 8-8-8-24 @ 1.65v and stick everything on auto, will I get those ratings or will the board undervolt the RAM to save the CPU?
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Vader
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post #5 of 5
You could probably undervolt a lot tbh

I'd start off at 1.5v and work my way up.

C
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