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i5 2500k & Asus P8P67 EVO memory choice

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  • i5 2500k & Asus P8P67 EVO memory choice

    I currently have a 4gb (2x2gb) 1600mhz CL6 1.65v G.Skill kit that has worked flawlessly, but it's time to get something bigger.

    Here are the candidates:
    2x4gb 1866MHz 9-10-9-28-2N 1.5v
    http://www.gskill.com/en/product/f3-14900cl9d-8gbsr

    2x4gb 2133MHz 9-11-10-28-2N 1.65v
    http://www.gskill.com/en/product/f3-2133c9d-8gab


    And here's the problem. My current rig, as stated at the title, is based on a Asus P8P67 EVO with a i5 2500k.
    Originally posted by AnandTech
    Current Sandy Bridge based processors officially support up to DDR3-1333 memory. Unfortunately, due to changes in the architecture, using faster rated memory (or overclocking memory) on Sandy Bridge via raising the base clock is extremely limited. Luckily, there are additional memory multipliers that support DDR3-1600, DDR3-1866, and DDR3-2133 memory. Some motherboards include support for even higher memory multipliers.
    Originally posted by Mobo Manual
    4 x DIMM, Max. 32GB, DDR3 2200(O.C.)/2133(O.C.)/1866(O.C.)/1600/1333/1066 Hz Non-ECC, Un-buffered Memory
    * Due to CPU behavior, DDR3 2200/2000/1800 MHz memory module will run at DDR3 2133/1866/1600 MHz frequency as default.
    According to the manufacturer, 1600mhz doesn't need OC yet higher frequencies do. According to AnandTech, for 1600 you already need to fiddle with the mem multupliers, so if that's not OC what will I need to do for 1866 and 2133 kits to work?

    With the whole OC perspective going on, I took a look at the voltage. The 2133 Ares need 1.65v, being that the maximum advised figure. If it's just that could be OK (even if I'd like to put less presure on the machine 'cause it's getting old), but any further requirement for OC (as maybe VCore or BCLK tweaks) would feel a bit too much.

    The same goes for the 1866 Sniper, though being rated 1.5v it wouldn't be that bad I guess.


    Also, my prefered choice here would be a 1866 Ares, but it's not available at my choice retailer and I won't trust amazon with electronics, so I can't get a hold on it. It would be my choice due the low profile (33mm), as the height of the Sniper (42mm) it's gonna make tricky the installation of a new CPU cooler I'm looking into.

    So the final question is: Could the 2133 memory, if I manually entered the BIOS settings, perform exactly like the 1866 one? Is the 2133MHz 9-11-10-28-2N 1.65v guaranteed to work at 1866MHz 9-10-9-28-2N 1.5v? If that was the case, I could just get those and set them one way or the other.


    Hope to read answers soon, I really wanna buy the memory already

  • #2
    Enable XMP and it should work fine at DDR3-2133. Of course you can down clock to the other DDR3-1866 if you would like, but that will be manual.

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