Memory Compatibility 2133(OC), 4 DIMMS okay?

Hey all.

I'm a little concerned about a build that I put together yesterday. It is as follows:

MB: ASRock Fatal1ty Z77 Professional
CPU: i7-3770K
GPU: GTX 480x2 SLI
RAM: Mushkin Enhanced Blackline 16GB (4GBx4) 2133Mhz
OS: Windows 7 Professional
SSD: Vertex 4 256GB

I was reading up in my Mobo manual and I noticed a curious sentence in the section on installing memory:

For optimal compatibility and stability while overclocking memory
frequency, it is recommended to install one memory module on
DDR3_B2 slot or two memory modules on DDR3_A2 and DDR3_
B2 slots.


Will this quad kit 2133Mhz memory that I purchased work? This sentence makes it seem like any OC memory would be limited to 2 DIMMS. The Mobo specifications state that it will accept 2133(OC).

I've never built a system like this so I'm not sure how OC memory works. I know I will have to go into the bios and manually adjust the frequency and voltage. I'm assuming I just will set those values to what the memory manufacturer says they should be?

Should I just go ahead and plan on returning the 2133 memory and trade it in for some 1600 (which I know will work)?

Thanks for the help everyone!
3 answers Last reply
More about memory compatibility 2133 dimms okay
  1. DDR3-2133 should work fine as a fully matched kit, the DIMM slots referenced assumes 1 stick or 2 sticks as the preference for a typical Dual Channel kit -- a 4x4GB kit assumes all slot are occupied -- those are the first to fill.

    The, assuming Mushkin Enhanced Blackline 994015, have CAS timings more suitable for Quad Channel i.e. X79 but should work okay. It's more a problem for the X79 to use a 4x4GB Dual Channel than visa versa.
  2. It's true that it is a dual channel board and I'm installing a quad channel kit. I assumed it wouldn't be an issue because I was under the impression that the DIMMs in a dual channel kit were the same as the DIMMs in a quad channel kit, there were just 4 of them instead of 2.

    I DO have the option of returning the Mushkin kit (994015) for a refund in favor of a dual channel kit instead. The dual channel kit just costs a bit more. Is there really an advantage to having 2 larger DIMMS vs. 4 smaller ones in a dual channel configuration?

    Thanks for the help!
  3. Example 4x4GB Dual Channel timings (CMZ16GX3M4A1600C9) 9-9-9-24 vs equivalent Quad Channel (CMZ16GX3M4X1600C9) 9-9-9-27.

    Mushkin Enhanced Blackline 994015 is a nice kit and should be fine, very few things will benefit from the DDR3-2133 vs DDR3-1600.

    IF you have any issues increase the VCCSA (VCCIO) to 1.20v~1.25v while using XMP.
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