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Upgrading RAM memory - Currently 2x2gb DDR3 - Adding 2x4gb DDR3

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  • DDR3
  • RAM
  • Memory Upgrade
  • Motherboards
  • Memory
Last response: in Memory
July 1, 2014 9:05:22 AM

Hello everyone,
Currently I have 4gb of ram, i'm going to add 8gb of RAM to my PC for a total of 12gb of RAM and I have a couple of questions.
1. Is it safe to mix up different RAM sizes?
2. My 2x2gb has a 9-9-9-24 timing at 1.5v and the new 2x4gb RAM i'm going to buy have a 9-9-9-27 at 1.65v. Will I need to adjust anything from the BIOS? If so, I would like some help to do it.
3.Is the RAM i'm going to buy compatible with my motherboard?

Current RAM:
http://www.amazon.com/Kingston-Modules-1600MHz-KHX1600C...

The kit i'm going to buy:
http://www.amazon.co.uk/HyperX-1600-Beast-Desktop-Memor...

My motherboard: ASUS M5A97 R2.0

Thank you

More about : upgrading ram memory 2x2gb ddr3 adding 2x4gb ddr3

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a b V Motherboard
a b } Memory
July 1, 2014 9:20:31 AM

Mixing the capacities is ok as lonk as you keep the different sizes in matched slots. The voltage difference would be more problematic as you can only have one voltage at a time. I don't recommend mixing the voltages. As far as being compatable with your motherboard, have you looked at the QVL supplied by Asus for that motherboard? or have you checked the Kingston site to see if they had tested that memory in that motherboard?
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July 1, 2014 9:37:49 AM

clarkjd said:
Mixing the capacities is ok as lonk as you keep the different sizes in matched slots. The voltage difference would be more problematic as you can only have one voltage at a time. I don't recommend mixing the voltages. As far as being compatable with your motherboard, have you looked at the QVL supplied by Asus for that motherboard? or have you checked the Kingston site to see if they had tested that memory in that motherboard?

What could happen if I mixed the the voltages?
The Kingston website didn't show anything if they tested on my motherboard but they did have a spec sheet which I still don't know if it's compatible. http://www.kingston.com/datasheets/KHX16C9T3K2_8X.pdf
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a b V Motherboard
a b } Memory
July 1, 2014 6:23:30 PM

kesyn said:
clarkjd said:
Mixing the capacities is ok as lonk as you keep the different sizes in matched slots. The voltage difference would be more problematic as you can only have one voltage at a time. I don't recommend mixing the voltages. As far as being compatable with your motherboard, have you looked at the QVL supplied by Asus for that motherboard? or have you checked the Kingston site to see if they had tested that memory in that motherboard?

What could happen if I mixed the the voltages?
The Kingston website didn't show anything if they tested on my motherboard but they did have a spec sheet which I still don't know if it's compatible. http://www.kingston.com/datasheets/KHX16C9T3K2_8X.pdf

The RAM that requires the 1.65V needs that higher voltage to be stable. If you run 1.5 v ram at 1.65 volts, you run the risk of burning the RAM up as it only requires 1.5 volts to remain stable. Overvolting is only used in overclocking situations and can reduce the life of your RAM.

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July 2, 2014 9:27:38 AM

clarkjd said:
kesyn said:
clarkjd said:
Mixing the capacities is ok as lonk as you keep the different sizes in matched slots. The voltage difference would be more problematic as you can only have one voltage at a time. I don't recommend mixing the voltages. As far as being compatable with your motherboard, have you looked at the QVL supplied by Asus for that motherboard? or have you checked the Kingston site to see if they had tested that memory in that motherboard?

What could happen if I mixed the the voltages?
The Kingston website didn't show anything if they tested on my motherboard but they did have a spec sheet which I still don't know if it's compatible. http://www.kingston.com/datasheets/KHX16C9T3K2_8X.pdf

The RAM that requires the 1.65V needs that higher voltage to be stable. If you run 1.5 v ram at 1.65 volts, you run the risk of burning the RAM up as it only requires 1.5 volts to remain stable. Overvolting is only used in overclocking situations and can reduce the life of your RAM.



I'm still not sure about this. According to some people they said "1.65V or below is extra safe, and will not give you any troubles. 1.7V Should also be relatively harmless for 24/7, even above that is still fine, but I'd start being careful after 1.7 anyways".
But i'll test it and see if there is any problems just to make sure. If everything goes wrong i'll have to remove the 2x2gb and wait for the 2x4gb to get delivered.
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