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Question about voltage and memory...

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a b } Memory
a b V Motherboard
April 7, 2011 7:37:52 PM

RAM also comes with a specific voltage rating. 1.65V is the rated required voltage for your RAM running at 1600 speed.

Just because your RAM is rated at that 1600 speed, doesn't mean it will run at that speed by default. Did you check the BIOS and see what speed it is running at?
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April 7, 2011 7:56:56 PM

ubercake said:
RAM also comes with a specific voltage rating. 1.65V is the rated required voltage for your RAM running at 1600 speed.

Just because your RAM is rated at that 1600 speed, doesn't mean it will run at that speed by default. Did you check the BIOS and see what speed it is running at?

By default, it was not running 1600. I upped it in the bios to 1600, but did not touch the memory voltage. I'm just wondering if I should.
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a b } Memory
a b V Motherboard
April 8, 2011 12:22:56 AM

You can up the ratio or speed in the BIOS, but you need to set the latencies according to the manufacturer as well for the RAM to run stable at the faster speed and you're good to go. Did you check with the manufacturer site?
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April 8, 2011 12:32:55 AM

Yes, and I think I got it. I'm running it at 1600 with timing set to 6-8-6-24 and running it at 1.65V. These are the settings the manufacture advertises. All seems stable so far!
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a b } Memory
a b V Motherboard
April 8, 2011 8:55:56 AM

teknic111 said:
Yes, and I think I got it. I'm running it at 1600 with timing set to 6-8-6-24 and running it at 1.65V. These are the settings the manufacture advertises. All seems stable so far!

You're all set then. There is good information about the memory controller in this article for the 1366 processors...

http://www.guru3d.com/article/intel-core-i7-920-and-965...
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a b } Memory
a c 212 V Motherboard
April 8, 2011 1:13:26 PM

In a 1366 system, the default memory multiplier is 8, default CPU multiplier is 20 . So here's what ya start with say w/ a 920:

133 BCLK x 20 CPU Multi = 2667 MHz (2.67 GHz)
133 BCLK x 8 Memory Multi = 1066 MHz

I think if you check the SPD info w/ CPU-z, I think you will find that it's 1.65 at 1600 but only 1.5 at 1333 and 1066. Note that it may work just fine at 1.5 volts but it s only guaranteed to be stable at 1600 at 1.65 volts.

Now when it gets interesting is when you start overclocking. By setting the RAM at 1600, you now have this:

133 BCLK x 20 CPU Multi = 2667 MHz (2.67 GHz)
133 BCLK x 12 Memory Multi = 1600 MHz

Another option would be:

160 BCLK x 20 CPU Multi = 3200 MHz (3.20 GHz)
160BCLK x 10 Memory Multi = 1600 MHz

Another option w/ a good cpu cooler would be:

200 BCLK x 20 CPU Multi = 4000 MHz (4.00 GHz)
200BCLK x 8 Memory Multi = 1600 MHz

Now with regard to voltage, you want to generally go thru the same step of voltage optimization as you would on the CPU after settling on your PC. On my son's 920 for example, we wer abl to drop the CPU down from 1.25 volts to 1.1125 volts which also dropped Prim 95 load temps from 70-72 to the mid to hi 50's. Memory voltage was dropped from 1.65 to 1.5625 but lower than that OC became unstable.

If ya want a good guide to the voltage optimization procedure and OC'ing.

http://vip.asus.com/forum/view.aspx?id=2008122019104023...
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April 15, 2011 1:53:43 AM

Best answer selected by teknic111.
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a b V Motherboard
February 3, 2012 10:09:38 PM

This topic has been closed by Mousemonkey
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