How can I tell if 1600 MHz RAM is XMP or not?

I have a 2011 MacBook Pro with a 2.4 GHz i7-2760QM CPU. The Intel website says the 2760QM CPU supports DDR3-1600 RAM. But looking on a Mac-related forum, people are saying you have to make sure to get the non-XMP version of 1600 MHz RAM or else it will run at 1333 MHz because the MacBook Pro doesn't let you go into the BIOS to change settings. They said that Kingston had XMP and non-XMP versions of 1600 MHz RAM and you could tell them apart by the model number.

How about this Corsair Vengeance 1600 MHz RAM: http://www.newegg.com/Product/Product.aspx?Item=N82E16820233265
Is there any way to tell if that is XMP or non-XMP?
10 answers Last reply
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  1. You mean it looks like it's non-XMP, right? That page says "No BIOS adjustments are necessary to take advantage of the faster memory speed."
  2. slhardware said:
    You mean it looks like it's non-XMP, right? That page says "No BIOS adjustments are necessary to take advantage of the faster memory speed."

    Same as I saw.
  3. I just noticed something on that page. If you click on the "Tech Specs" tab on the left side, it says the following:

    Performance Profile: XMP
    Speed Rating: PC3-12800 (1600MHz)
    SPD Speed: 1333Mhz
    Tested Speed: 1600Mhz

    So now I'm confused, is it XMP or non-XMP?
  4. Edit: duplicate post.
  5. Default 1333 and XMP 1600. I missed that you will need something with spd of 1600
  6. So it will only run at 1333 if my computer doesn't support XMP? That seems to contradict the "No BIOS adjustments are necessary to take advantage of the faster memory speed."
  7. Does not make any sense, was what I saw first. Maybe this is what you need to be looking at http://www.corsair.com/us/memory/laptop-memory-upgrades/corsair-mac-memory-16gb-dual-channel-ddr3-sodimm-memory-kit-cmsa16gx3m2a1600c11.html still has the spd at 1333 but come to think of it I have 1600MHz ram in my IB build with spd of 1333 but it defaulted to 1600 anyway.
  8. No, that RAM is XMP, I have it in my laptop and it only runs at 1333 (since I cannot access XMP with my BIOS). CPUz verified it.
    http://valid.canardpc.com/cache/banner/2595895.png
    and no, dont ask me why I have 10GB of RAM with only 1 8GB stick installed.
  9. And an I5 that only supports up to 1333MHz http://ark.intel.com/products/52229/Intel-Core-i5-2520M-Processor-3M-Cache-up-to-3_20-GHz in stead of I7? You know that it happens that CPU-Z is wrong.
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