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Is it ok to add 1.5 0r 1.25v rams to a computer with 1.65v rams?

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a b } Memory
December 30, 2011 8:38:01 PM

im using 2 ddr3 1.65v rams and i wanna add the G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-8GBXL to them which are 1.5V is it going to be ok or it might cuz any sort of problem?if it might should i just ditch the old ones or what?im running a gigabyte p55 ud3,i5-650 computer,4GB ram.....thanks in advance
December 30, 2011 8:44:14 PM

It is never a good idea to mix match RAM. Always get the the same voltage.
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a b } Memory
December 30, 2011 8:48:30 PM

well how can i match the voltage i heard theres a way to make my current ones 1.5V.....how do i do that
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December 30, 2011 8:49:37 PM

Unfortunately I cannot answer that, hopefully someone more experienced on RAM can.
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a b } Memory
December 30, 2011 8:56:52 PM

ight thanks
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December 30, 2011 9:10:26 PM

It is possible it could work but either way you look at it you would basically be overclocking the memory which in and of itself is a risk. The higher the difference in voltage the higher the risk. (Overvolt or Undervolt)
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December 30, 2011 9:49:56 PM

All DDR3 memories are required to work at 1.5V. Your 1.65V are actually overclock-friendly memories. But at 1.5V, they will work just not on the highest settings.
So before you put the new memories, check your BIOS to have the RAM set to auto-detection, not customized settings. The performance impact is not so high. Do this before installing because if you have the higher settings forced, the BIOS will try to use them with the new RAM which probably will not work.
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December 30, 2011 9:54:02 PM

no, bad idea, you will either have to undervolt and underclock the ram you have, or overvolt the new ram, which could destroy it. What is the ram your currently running? It may be able to be undervolted, but would need to be underclocked to be stable. There's plenty of 1.65v ram on the market. Safest bet is to remove your old ram and only use the new ram. 8gb is plenty, the extra 4gb wont see you any difference. If anything the older ram with different timings/voltages will just slow the new ram down and cause instability.
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a b } Memory
December 30, 2011 10:07:33 PM

currently im running the ADATA XPG™ Gaming Series 2x2GBs 1600s
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December 31, 2011 2:05:47 PM

iam2thecrowe said:
no, bad idea, you will either have to undervolt and underclock the ram you have, or overvolt the new ram, which could destroy it. What is the ram your currently running? It may be able to be undervolted, but would need to be underclocked to be stable. There's plenty of 1.65v ram on the market. Safest bet is to remove your old ram and only use the new ram. 8gb is plenty, the extra 4gb wont see you any difference. If anything the older ram with different timings/voltages will just slow the new ram down and cause instability.

Slowing things down will not cause instability. This is not about halving the frequencies. This is about just 10-20% less. And actually 1.65V is overclocked memory.
Oh, and since the OP asks these questions, I doubt he actually uses 1.65V, since it's also dangerous to the CPU so the BIOS wil not set it by default.
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a b } Memory
December 31, 2011 3:09:01 PM

mathew7 said:
Slowing things down will not cause instability. This is not about halving the frequencies. This is about just 10-20% less. And actually 1.65V is overclocked memory.
Oh, and since the OP asks these questions, I doubt he actually uses 1.65V, since it's also dangerous to the CPU so the BIOS wil not set it by default.

ok now im lost can u explain ....and assuming im only using 1.5.....is it ok to add two 1.25v?
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a b } Memory
January 6, 2012 11:40:17 PM

hm....im assuming no one has any further info to add,well my rams are currently runing at 1.5V all i wanna know wether or not it will be ok to use the gskill ones with em considering the difference in voltage ....or does it realy not matter as long as i dun change the voltage from 1.5 and try to over clock em.....thanks
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a b } Memory
February 14, 2012 8:38:38 PM

Best answer selected by h3sham.
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a b } Memory
February 14, 2012 8:49:32 PM


they will work @ 1.5V which means they will be over clocked ,and i will have to make the 1.65 rams run at 1.5V to avoid dmging the new ones
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a c 146 } Memory
February 14, 2012 11:05:18 PM

This topic has been closed by Nikorr
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