DDR3 1866 on Motherboard supporting 1600

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senthurpandian

senthurpandian

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Nov 3, 2011
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Hi,

I have ASRock H97M Pro4 which supports DDR3 1600 max.

Question 1: Is it ok to install DDR3 1866 (4GB)? Will the motherboard lower the channel to 1600 and use the RAM?

Question 2: I already have a dual channel DDR3 1600 (4GB x 2) installed, will there be any problem?

Note: both are from the same maker and series (G.SKILL Ripjaws X Series)
There is a deal and thats why I'm planning to get this RAM.

Thanks in advance
 
Solution
I
1. If the default is 1600, then that's what the 1866 will run at

2. Yes - mix ram and it most likely won't work. H97 needs dual channel ram eg 2 x 4gb 1866 cl9 1.5v. You should buy a kit to guarantee it working.
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It's not best to mix two different modules of RAM. Compatability issues could arise, which are a pain in the rear. More likely than not, however, it will work out alright.
The motherboard will lower the new RAM to DDr3 1600 to match the old RAM.
 
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What kind of problem are we talking about?
 
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so, single ram wont work on a dual channel motherboard?
 
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Can you tell me

(1) what are the problems i might face when i mix 2x1600 ram with 1x1866 ram on 1600-max dual channel motherboard
(2) as you mentioned, it will work out of the box, what performance difference i might see

sorry if its dumb/unpredictable
 
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thank you.

so, what i understand from you is:

buy additional 2x4gb dual channel ram with 1600 frequency

so, i will run 2 dual channel rams (4 x 4gb) @ 1600
 
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I have installed the following setup and it works just fine for the past 1 month.

G.SKILL Ripjaws X Series 8GB (2 x 4GB) DDR3 1600
G.SKILL Ripjaws X Series 4GB DDR3 1866
-- Total 12GB

Motherboard: ASRock H97M Pro4 - set at 1600


Thanks for all your inputs.
 
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If the sticks will play together it will prob go to the mobos default of 1333, then if they play nice you can try setting manually to 1600 (may require a little extra DRAM voltgae or even try to run them at 1866 (again extra DRAM voltage and possibly a little extra to the MC (memory controller). If they play, dual channel can provide up to about a 10-15% performance increase. If they don't want to play, might be able to help them with timing/voltage adjustments, if needed give me a holler. As far as slots go, each chhannel (A and B) consist of 2 slots each for expandability, with all 4 populated it's still DUAL channel mode
 
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wow, a lot to understand.

* I have utilized 3 slots. first channel with 2 4gb ddr3 1600 and 2nd channel with 1 4gb ddr3 1866 sticks
* I remember setting the frequency to 1600 in bios

I am not sure how to set them to dual channel mode or how to increase/tweak voltages safely
My mother board is ASRock H97M Pro4

Please let me know how to tweak them to max out the performance :)
 
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It's on a Intel build, so with 3 sticks of 4GB each you are running in what is called FLEX mode, if you check in CPU-Z (free app) in the memory tab, you should find it showing as being in dual channel mode, which is quasi correct, you actually have 8GB running in dual channel mode and the odd 4 GB is running in single channel (which is fine), just saw your other thread where somebody was saying all would be in single channel and other misinformation. You should be fine as is as long as it's stable 😉
 
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