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Sandy bridge, dominator ram

Last response: in Overclocking
March 16, 2011 9:39:14 PM

Hi all,

So, I've been reading that the recommended voltage for memory for my sandy bridge is 1.5v. The memory I have states that it runs at 1.65v, 1600 I believe (maybe 2000?).

Shortly after I got this build up and running, I started looking around in the "bios" and MSI contol center II for the voltage so I could down-tune them for safety reasons.

I've heard that the ram I have is actuall 1066 or 1333 I think(?) with the voltage increase to 1.65 to basically oc them to the advertised frequency or 1600 or whatever it is.

When I looked at the voltage in the MSI control center II, it says 1.4XXv (I don't remember the hundredths and thousandths digits), and my ram speed is 1066, possibly 1333, but I can't remember... I think it's 1066.

Does this have something to do with turbo boost being on? Which I think it is.

If I turn turbo boost off will the voltage kick up to 1.65 (and subsequently the ram's frequency kick up too)?

Is it recommended, if the above is true, to lessen the voltage to within 5% (as ive read) of the recommended 1.5v?

Thanks in advance!


March 16, 2011 9:46:08 PM

Sorry, I forgot a few details that might help.

i5 2500k
Corsair Dominator GT 8GB (2x4GB) DDR3 2000

The ram is 1.65, DDR3 2000 which I wasn't sure of until now.


a b } Memory
March 17, 2011 12:54:41 AM

No, it is because the 1600 speed is not a standard speed, as you know, so it is not set automatically. Change the voltage to 1.5 V and the multiplier to 16x, and see if it works. If it doesn't, then try 1.6 V. Up to 1.6 V is safe officially, and most don't seem to have trouble with 1.65 V.
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a b } Memory
a b K Overclocking
March 17, 2011 3:38:22 AM

The CPU/BIOS automatically defaults to 1333 for RAM speed.

With that RAM, you can probably get 1600 speed at 1.55-1.6v or so.
March 17, 2011 5:14:30 PM

I'm not sure if it's because of turbo boost, but the control center says the ram is at 1066. Is the whole point of turbo boost just to respond to processor load while maintaining energy efficiency? At idle each of my processor cores read 1.6ghz, until I start gaming or something then they've jumped up as high as 3.7.
March 17, 2011 5:17:13 PM

Oh, I haven't watched my ram speed though with different loads. My mobo or graphics card, can't remember which, was supposed to come with sisoft or furmark or something free for a month but I don't see it in any of the included materials. So I'm not sure.

Also wanted to say thanks to everyone for the info.

May 13, 2011 7:09:34 AM

Thanks for disccusing on this topic, it really is important to be understood and cleared.