Different voltages ddr3 rams

My system is like that:
Gigabyte ga-ma770t ud3p (f3 bios)
550w psu (in Lian Li case)
Phenom 2x2 550 be @3.1ghz (standard)
ati hd 4850
WD chavier black 500gb
LG 22x dvd writer
Win 7 x64
and two rams:
1) Ocz 12800 2gb gold 1600 mhz 8-8-8 @1.9v,
2) Ocz 12800 2gb gold 1600 mhz 8-8-8 @1.7v

Can i run these rams together in dual channel mode @1600mhz (if yes how)?
Actually i bought first ram before (1year ago)
and now i couldn't find 1.9v so bought second ram. Now i use them @1066mhz standard voltage and dual channel.
11 answers Last reply
More about different voltages ddr3 rams
  1. Hi newcomer and welcome to the Tom's hardware forum.

    Both have very similar specifications so it's possible just change the voltage in the BIOS to 1.7V and test the rig for stability.
  2. If you use 1.7V, try setting the RAM to 1333MHz, then boot into memtest86+ (from the .iso file), to see if your RAM passes the tests - they take about 45 mins to run (unless there are errors). If that doesn't work, take them back down to 1099MHz and run memtest again.
  3. Thanks a lot, I will try them. Whether they will work or not i'll write the results.
  4. Firstly, i booted f8 bios then I tested each rams with memtest86 v4.00 and both passed @1600mhz and 1.7v (4 times). However, when i used them together there were some errors @ 1600mhz or 1333mhz, from 1.7v to 1.9v. I can use the first ram(1.7v or 1.9v, 1600mhz) perfectly if i use only it . And interestingly, when i used only the second ram (@1333mhz or 1600mhz) win7 or ubuntu 10.04 could not be booted even the ram passed the test. There is something wrong and i don't know what it is. So any suggestions?
  5. Try with only one stick of the 2nd RAM kit.
  6. I tried using only 2nd kit too. It passed memtest86 several times without error but it crashes sometimes, while booting windows or anytime freezes forever. I think the problem is with this ram because the first ram is very similar and there is no problem with it. However, the 2nd ram passes memtest86 so i'm not sure about giving it to guarantee service.
  7. RMA and wait for the new one.
  8. Thanks for the advice. I'll give and wait for new one.
  9. Ok, let me know when u get it.
  10. also the first ram works without error @1.7v 1600mhz and passes memtest86 but @1.66v or 1.64v it gives some errors so does it mean that if they give me a ram working @ less than 1.7v the rams can't work together @ 1600mhz
  11. I think that the other RAM can works @ 1.7V without problems.

    Also check if u have the last BIOS version for ur mobo.
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