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Higher Speed RAM in lower speed mobo

The answer to this seems distinctively obvious but I'm not really sure so I'll go ahead and ask anyways. Newegg currently has a super deal on G.Skill 2400 RAM, but the motherboard I'm going to get (ASRock Extreme4) says it only supports up to 2100. Is it possible to use the RAM in the mobo at a lower speed, or are they completely incompatible?
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  1. They will run at a lower speed.
  2. The RAM will be limited by the motheboard's electrical capacity to run at speed and the BIOS limitations. And the CPU.

    If the RAM is a good deal and even cheaper than slower RAM, go for it. You can always use the RAM later in a faster system.

    If it is not cheaper, or you won't upgrade soon, it is definitely not worth it as the extra capacity will go unused.
  3. Which Extreme 4? AMD? the 970? If so, depending on CPU and how much DRAM you'll be running Max will be maybe 2133 w/ 8/16GB (that with an 8350, but realistically looking at 1866, so might compare prices with 1866 sticks
  4. Tradesman1 said:
    Which Extreme 4? AMD? the 970? If so, depending on CPU and how much DRAM you'll be running Max will be maybe 2133 w/ 8/16GB (that with an 8350, but realistically looking at 1866, so might compare prices with 1866 sticks


    The AMD 970. The RAM is cheaper than any other RAM I've looked at so it's a great buy, and I don't mind running it at a slower speed, but I want to make sure that the mobo can support the RAM.
  5. Best answer
    Yes, as mentioned it will be slower, 22133, 1866 hopefully and need to be set up manually, but just give me a holler, been helping folks with these issues for a long time
  6. Tradesman1 said:
    Yes, as mentioned it will be slower, 22133, 1866 hopefully and need to be set up manually, but just give me a holler, been helping folks with these issues for a long time


    Okay then, one last question. Will I need to go through the BIOS to manually set speeds before boot or should it be "plug and play" like most RAM? I've heard that most modules are usually set to 1333 automatically and then you can change the speeds later through the BIOS.
  7. Yes, the mobo will see the new DRAM and boot to it's default, normally 13333 with 9-9-9-27 or so timings, you then manually set them up
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