Adding RAM with Different Voltages

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Fesims

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May 14, 2015
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I have a PC with a stick of 4GB RAM:
DDR3 1600 (PC3 12800)
Timing 9-9-9-24
Cas Latency 9
Voltage 1.5V

My buddy is upgrading his system and has 3 sticks of 2GB RAM
DDR3 1600 (PC3 12800)
Timing 9-9-9-24
Cas Latency 9
Voltage 1.65V

As you can see, the specs are the same except for voltage. My question, I have 4 slots for RAM with Dual Channel support, so could I put a pair of the 2GB in dual channel in 1 and 3 and then move the 4GB to slot 2? Would the voltage difference cause a problem? Would it work if I changed the voltages in the UEFI?

The motherboard: http://pcpartpicker.com/part/gigabyte-motherboard-gaf2a88xmd3h
 
Solution
Tradesman1
Give them a try, that's the only way you'll know, there are no guarantees when mixing DRAM (contrary to the response above). I'd start with the 2GB sticks in slots 1,2 (effectively channel A) and set them to spec 1600, 9-9-9-24 1.65, boot make sure all is well. Then shut down and add the 4GB stick to slot 3 from CPU (channel B), this way - if they play you will have 4GB in each channel with all running in dual channel mode via AMD's adaption of Intel's Flex technology
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Tradesman1

Tradesman1

Legenda in Aeternum
Jun 5, 2013
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Give them a try, that's the only way you'll know, there are no guarantees when mixing DRAM (contrary to the response above). I'd start with the 2GB sticks in slots 1,2 (effectively channel A) and set them to spec 1600, 9-9-9-24 1.65, boot make sure all is well. Then shut down and add the 4GB stick to slot 3 from CPU (channel B), this way - if they play you will have 4GB in each channel with all running in dual channel mode via AMD's adaption of Intel's Flex technology
 
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