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G-Skill Ripjaws 32gb ram with Rampage 4 - only 16 recognized!

  • Asus
  • RAM
  • Rampage
  • Motherboards
Last response: in Motherboards
December 29, 2011 4:54:24 PM


My system is an Asus Rampage 4 Extreme, with this G-Skill memory kit installed:

My problem is that only the DIMMs in the first 4 slots (A1,A2,B1,B2) are being recognized. All 8 sots will show up in the BIOS POST, but only the 4 in those slots will count towards the total onboard RAM. I've confirmed this by removing and shuffling my DIMMs around and rebooting several times.

Am I missing something to be able to set this mobo up for 32 gb ram?

Thank you!

More about : skill ripjaws 32gb ram rampage recognized

December 29, 2011 5:29:25 PM

I'm also noticing that the RAM is being set to 1600 not 2133. System is unstable at 2133 :-/
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December 29, 2011 7:42:48 PM

Im taking a wild guess here and mixing it in with my research that your motherboard can support a certain amount of RAM and I am guessing you went over your RAM amount.
January 8, 2013 12:32:06 AM

The documentation for the Asus Rampage IV Extreme gives no indication on the supported memory vendors list that it supports 8 sticks of memory or 32GB of RAM. Having said that, they tend to lie, my Asus P5E3 "supports 8GB' but runs just fine with 16GB of DDR3-1600.

Ensure your BIOS is updated to the latest version as this will have a significant impact on your RAM compatibility. You should be at BIOS 3301. If you're at 1404 or less then you will have run the BIOS converter first.

Their specs are:
8 x DIMM, Max. 64GB, DDR3 2400(O.C.)/2133(O.C.)/1866/1600/1333/1066 MHz Non-ECC, Un-buffered Memory
Quad Channel Memory Architecture
Supports Intel® Extreme Memory Profile (XMP)
* Hyper DIMM support is subject to the physical characteristics of individual CPUs.
* Refer to or user manual for the Memory QVL (Qualified Vendors Lists).
Multi-GPU Support

Make sure you turn on BIOS XMP support.