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Mix two DDR3 kits with different voltages

  • Chipsets
  • DDR3
  • Motherboards
Last response: in Motherboards
December 29, 2011 5:24:31 PM


First poster here. I bought a second memory kit advertised (mistakenly) as KHX1333C7D3K2/4G ( , this is the one I have right now in my PC) when in fact it was KHX1333C7D3K2/4GX ( , the same kit but with XMP support and different voltage.

Now, the kit I have installed in my PC its 1.7v and the new kit (the XMP one) its 1.65v. I don't plan to overclock. Does anybody know if I can mix the kits? my mobo is a GA-890GPA-UD3H.

Thanks in advance.

More about : mix ddr3 kits voltages

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a c 78 V Motherboard
January 2, 2012 4:39:56 AM

It should work. You should begin by setting the RAM voltage to 1.65V in the BIOS, then save the settings and exit the BIOS screen. The system will re-start.

At that point I would boot to run memtest86+, testing one stick of RAM at a time. If all pass, then test them all together. If memtest86+ fails at the 1.65V setting, try increasing the RAM to 1.7V and run memtest86+ again.

After all 4 sticks of RAM pass memtest86+, boot to the OS and run whatever you do for system tests and benchmarking.
January 9, 2012 12:34:50 PM

Thank you treefrog07. I installed them and so far everything is ok.
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January 9, 2012 12:35:02 PM

Best answer selected by ogalonzo.
a c 78 V Motherboard
January 13, 2012 6:44:12 PM

You are welcome.