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DDR3 Memory

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April 22, 2012 8:43:15 AM

Can anyone explain to me how does the memory rating of a typical LGA1155 motherboard works ? What I mean is if you take for example the required memory ratings for a motherboard for example a board from the Newegg site is as follows:

ASRock X79 Extreme6 LGA 2011 Intel X79 SATA 6Gb/s USB 3.0 ATX Intel Motherboard

Memory Standard: DDR3 2400+(OC)/2133(OC)/1866(OC)/1600/ 1333/1066

and the description of some DDR3 memory found on the same Newegg site is as follows:

CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMZ8GX3M2A1600C9


How can DDR3 memory rated at 1600 MHz work at 2400+ MHz speeds ? Does this require some adjustments in the BIOS settings in order to achieve the OC speeds rated by the motherboard ?

Thanks in advance

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a b } Memory
a b V Motherboard
April 22, 2012 12:27:05 PM

The above memory most likely won't work at 2400MHz. ASUS is just saying their motherboard can be overclocked reliably to that speed. That RAM in question is only supported to go up to 1600.
You would need RAM that explicitly stated support for 2400MHz (e.g., 240-Pin DDR3 SDRAM DDR3 2400 (PC3 19200) Desktop Memory)

Keep in mind, those ASUS speeds that have an "OC" next to them is overclocking. Make sure you've done your homework and understand what complications and nuances that go along with OCing (ex: potentially voiding warranties, unstable system, etc)
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April 22, 2012 11:59:22 PM

@psausL: Thanks for the reply. Your answer clears up a lot confusion. The main reason that the information on the Newegg site was confusing was that they state that the motherboard memory can be overclocked and not CPU clock speed. Furthermore on the Newegg site there is no item called DDR3 2400 for sale.

Best Regards
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a b } Memory
a b V Motherboard
April 23, 2012 8:19:26 AM

Yea, not the most clear of sites sometimes. But they do have some great deals! :) 

As for DD3 2400, they do have it, you just have to dig for it. (that's where I got the bold text I pasted in my last post).
If you're on their page, looking at desktop memory, you can filter again by scrolling down and clicking "more" under the speeds area. You'll find all kinds there...
But keep in mind, going to 2400 on your RAM is a pretty high overclock. Do make sure you understand the implications of doing that.
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