5 Replies Latest reply on Nov 22, 2011 3:55 AM by Milasi

    Why does my DX58SO only show a memory spead of 1080Mhz?


      I have an Intel DX58SO motherboard with and i7-920 cpu. I want to upgrade the memory in my computer from the current memory KVR1333D3N9K3/3G to KHX1600C9D3K3/6GX.  So, I want to go from 3GB to 6GB and 1333Mhz to 1600Mhz. Will I have any problems doing that? I guess the timings are the same except the voltage needs to go from 1.54v to 1.65v, but is everything else the same too?  I guess I would need to change the memory settings on my motherboard back to automatic detection before I install the new memory so it will detect the new memory settings and voltages and I won't have a problem.  The motherboard didn't detect the correct timings when I installed the memory so I had to adjust everything manually. The timings seem the same though on both memory chips.




      On Kingston's above website it says the following, "DDR3 1333MHz DIMMs are supported only with Core i7 Extreme Edition processors. Using other processors will downclock memory to 1066MHz speed."  I assume that's the same with 1600Mhz memory?  Since my CPU isn't an Extreme CPU then the memory will only run at 1066Mhz until I upgrade to an Extreme CPU?  On Intel's website it seems to say that the Extreme CPUs only support 1066Mhz memory, so I'm really confused.


      Here are the specs on my current memory:



      Search Results for: KVR1333D3N9K3/3G
      Description:3GB 1333MHz DDR3 Non-ECC CL9 DIMM (Kit of 3)
      Detailed Specifications:Standard 128M X 64 Non-ECC 1333MHz 240-pin Unbuffered DIMM (DDR3, 1.5V, CL9, FBGA, Gold)  (Datasheet)
      Mfgr's System P/N's:N/A
      Form Factor:Memory Module
      Pieces/Unit:3 (Three 1GB modules, totaling 3GB)


      Here are the specs on the new memory I want to get:





      KHX1600C9D3K3/6GXIntel X.M.P, DDR3-1600, non-ECC, unbuffered DIMM.6GB
      3 - 2GB


      How do I know if the processor supports 1600Mhz memory?  I contacted Kingston and they said I needed to contact Intel.


      This is from Intel's website listing what is required for 1600Mhz compatible memory.




      Memory Features


      The Desktop Board supports the following memory and interface:


      • Four 240-pin Double Data Rate 3 (DDR3) SDRAM Dual Inline Memory Module (DIMM) connectors with gold-plated contacts arranged in two channels
      • 1600+/1333/1066 MHz DDR3 SDRAM Memory Modules
      • Support for single- and dual-channel memory interleaving
      • Unbuffered, non-registered single- or double-sided DIMMs with a voltage rating of 1.65 V or less
      • 16 GB maximum total system memory (with 2 Gb memory technology).
      • Minimum total system memory: 1 GB using 512 MB x16 module
      • Non-ECC DIMMs
      • Serial Presence Detect
      • XMP version 1.2 performance profile support is required for memory speeds above 1333 MHz or use of manual adjustments.


      Using a DIMM with a voltage rating higher than 1.65 V may damage the processor.


      DDR3 1600 or higher memory support on this motherboard requires compatible XMP enabled memory or advanced knowledge of BIOS and manual memory tuning. Individual results may vary.

      To be fully compliant with all applicable Intel® SDRAM memory specifications, the board should be populated with DIMMs that support the Serial Presence Detect (SPD) data structure. If your memory modules do not support SPD, you will see a notification to this effect on the screen at power up. The BIOS will attempt to configure the memory controller for normal operation.

      Intel Desktop board DX58SO has four 240-pin DDR3 DIMM sockets arranged in three channels (A, B, and C). Channel A shares two sockets (DIMM 0 and DIMM 1) and Channels B and C have one socket each.

      32-bit operating systems are limited to a maximum of 4 GB of memory. The operating system report less than 4 GB because of the memory used by add-in graphics cards.

      For information on Intel® XMP-ready DDR3 SDRAM DIMMs, refer to Intel® Extreme Memory Profiles.