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Asus Prime Z270-A - max (officially supported) 2133 or 2400 MHz DDR4 RAM for i7-7700K?

So, I've purchased an Intel Core i7-7700K processor, and in the documentation it says that it officially supports both 2133 MHz and 2400 MHz DDR4 RAM speeds.

However, in the documentation for my Asus Prime Z270-A motherboard, listed under supported RAM speeds it says : "2133 MHz / 2400 MHz (O.C.)" and up etc. I suppose "(O.C.)" means overclocked? For comparison I checked the specification for three Z270 chipset ASRock motherboards (Z270 Taichi, Z270 Extreme4 and z270M Extreme4) and there's no "(O.C.)" besides the supported 2400 MHz RAM frequency there - just a "**" referring to the fact that only 7th Gen Intel CPU supports 2400 MHz RAM. Which is the processor I will use.

So can this be a misunderstanding on my part? Maybe there's some small print somewhere in the documentation for the motherboard that I've missed? :D

I'm looking to buy a kit of 2 x 16GB sticks of the fastest RAM officially supported by the processor and motherboard, since I have no plans to overclock the RAM. I will also be running the CPU at stock speed (I bought the "K" version for the slightly faster base clock speed).

I sent Asus a support request a couple of days ago, but haven't heard from them yet. I just think it's strange if their quite new Z270-A wouldn't support the same base RAM speeds that the processor and Z270 chipset does. Any thoughts?

https://ark.intel.com/products/97129/Intel-Core-i7-7700K-Processor-8M-Cache-up-to-4_50-GHz

https://www.asus.com/Motherboards/PRIME-Z270-A/specifications/
Reply to Datamaskin
3 answers Last reply Best Answer
More about asus prime z270 max officially supported 2133 2400 mhz ddr4 ram 7700k
  1. With that processor these should be plug in, enable XMP profile and play.
    https://pcpartpicker.com/product/MYH48d/corsair-memory-cmk16gx4m2b3000c15
    Reply to Zerk2012
  2. Zerk2012 said:
    With that processor these should be plug in, enable XMP profile and play.
    https://pcpartpicker.com/product/MYH48d/corsair-memory-cmk16gx4m2b3000c15


    Thanks for your reply, Zerk2012! The kit you suggest would be fine if I had an intention to overclock the RAM, but as I wrote in my post I do not. But this is a bit beside the topic, since I'm basically wondering if the Asus Prime Z270-A officially supports 2400 MHz or not, even though it does say "2400 MHz (O.C.)" in the specifications. It's also strange considering the three ASRock MB's I mentioned all state that they support 2400 MHz without having to overclock the RAM - with the only requirement being that you run a 7th Gen Intel Kaby Lake processor. Adding to the mystery, Intel also states that the chipset support both 2133 and 2400 MHz RAM speeds.
    Reply to Datamaskin
  3. Best answer
    The "supported" 2400 MHz is what intel offficially supports, but the chip should be able to run faster memory.
    Got a 3570K which oficially supports up to DDR3-1600, but has no trouble running DDR-2133 (what my memory can run at, even higher should be no issue)
    Reply to lordmogul
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