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Motherboard ram speed

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February 14, 2013 10:28:44 PM

Hi guys, I just bought 2x4 gb dominator platinum at 1600mhz c8, but somehow my maximus v formula only recognize 1333mhz? Is there something wrong because its unstable? Could I manually tweak it to 1600 and not having any trouble? Thank you.

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a b } Memory
a c 98 V Motherboard
February 14, 2013 10:35:31 PM

That RAM is great RAM and it has an XMP profile. Set the XMP profile to the appropriate value in the BIOS (on my board it is XPM Profile 1). Also set the RAM speed limit in the BIOS to 1600 MHz.

I had a similar issue with my Vengeance RAM and this is what I did. Works fine at 1600 MHz now.
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February 15, 2013 3:56:08 AM

Ubrales said:
That RAM is great RAM and it has an XMP profile. Set the XMP profile to the appropriate value in the BIOS (on my board it is XPM Profile 1). Also set the RAM speed limit in the BIOS to 1600 MHz.

I had a similar issue with my Vengeance RAM and this is what I did. Works fine at 1600 MHz now.

Sorry, I am new to all this, but how do you enter xmp and what will you do then. THanks!
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a c 85 } Memory
a c 466 V Motherboard
February 15, 2013 5:09:17 AM

on asus mb it under the ai tweeker page in the bios..dram speed (default is auto) change it to xmp.
xmp is intel spec for ram that overclocked. if you were to run cpu-z and under the spd info for the ram the last box (xmp) would be the fastest your ram could run.
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a b } Memory
a c 98 V Motherboard
February 15, 2013 11:34:56 AM

pete123edgar said:
Sorry, I am new to all this, but how do you enter xmp and what will you do then. THanks!

Since you are new to this, start by reading so that you understand the settings in the BIOS and its effects. Then do what smorizio suggested; download and run "CPU-Z" (speed monitoring tool) - then make the settings in the BIOS after reading the motherboard manual.

http://www.cpuid.com/softwares/cpu-z.html (click on the correct download button)
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a b } Memory
a c 98 V Motherboard
February 15, 2013 11:37:03 AM

If you make an error in the BIOS settings, depress the "Clear CMOS" button on the motherboard and/or the back of the computer and the BIOS will reset itself to original settings.
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a b } Memory
a b V Motherboard
February 15, 2013 11:40:55 AM

BEFORE hitting that "Clear MOS" verify what the setting for your HDD is, ie IDE or ahci, or Sata. Clearing CMOS may change that setting and if so you may not be able to Boot into windows until you change it back to what it was.

PS if this is for a Sandybidge CPU, 1333 is the default setting as DDR3-1600 voids the Warrantee on SB CPUs. For IB the default was raised to DDR3-1600.
Personnally DDR3-1600 works fine in SB.
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February 15, 2013 8:01:15 PM

thanks everyone, I just change it, it all works well, but then there isn't much difference between 1333 and 1600,
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February 15, 2013 8:01:36 PM

Best answer selected by pete123edgar.
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a b } Memory
a c 98 V Motherboard
February 15, 2013 9:27:18 PM

Thank you! Yes you are right about the speed differences. On another older computer that I OCed the CPU by about 42% the RAM is underclocked to 1452 MHz instead of the 1600 MHz. I can't see much speed difference either!
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