Cannot get 16 GB of RAM to run at listed 1600, only reaching 1333

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Uckofay

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Feb 4, 2014
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I have a new ASUS Z87-EXPERT LGA 1150 Intel Z87 mobo with a Intel Core i7-4770K Haswell 3.5GHz LGA 1150 84W Quad-Core processor and I installed two 8 GB G.SKILL Ripjaws X Series DDR3.

My mobo keeps reading out an error 51 on the board LED, and that relates back to a DRAM issue in the manual. In the bios I can see its reaching only 1333, and I created a new XMP profile and manually set the speed to 1600, but after saving and exiting, and then restarting to verify the changes took, the RAM is still down.

I don't think I'll notice a real difference in the real speed, but could potential issues pop up because of this? I'd love some input from someone more experienced.

Thank you
 
Solution
Adroid


Sometimes if your motherboard doesn't automatically "recognize" the RAM, you will need to manually set the timings and voltages. You need to find the exact specs and compare it to what the BIOS is running it at...
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faalin

faalin

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Feb 22, 2012
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did you check to see what your timings are set to? if its booting up at 1333mhz it may have lower timings lets say 8-8-8-24 and when you switch it to 1600mhz if you don't change the timings to the correct numbers the ram my not like the old timings. The most common ram setting for 1600mhz ram is 9-9-9-24, give that a try and also make sure you voltage is set correct.
 
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Uckofay

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Feb 4, 2014
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I did check the timing, it is set to 9-9-9-24. How would I know the correct voltage? That had not occurred to me.

Thank you!
 
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Adroid

Adroid

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Jul 2, 2009
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If the ram doesn't have XMP profiles, Go into the bios and manually set the ram the voltage. Make sure not to over volt, 1.5v is the max I believe for haswell. You should check the max voltage for the CPU and not the ram. If the ram is rated at 1.65v, that may be your problem, but you should not run the ram at 1.65 with a haswell CPU, because it can damage your CPUs memory controller.
 
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Uckofay

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Feb 4, 2014
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If I recall correctly, I think it was at 1.5, but I will look. Thank you for the advice on not going over what the mobo can handle.
 
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Adroid

Adroid

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Jul 2, 2009
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Sometimes if your motherboard doesn't automatically "recognize" the RAM, you will need to manually set the timings and voltages. You need to find the exact specs and compare it to what the BIOS is running it at. For instance, 10-10-10-27 RAM may not run at 9-9-9-24 etc.
 
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