Very specific question about ram mixing

[Jaga848]

I have quite a specific situation I want to ask about.

My motherboard is gigabyte b250 hd3p. The RAM slots channels are (when looking from left to right) AABB, or DDR4-4, DDR4-2, DDR4-3, DDR4-1, with 4 AND 2 BEING CHANNEL A, and 3 AND 1 BEING CHANNEL B.

I currently have 2x4gb sticks of Kingston HyperX Fury RAM running in dual channel mode (put in the DDR4-2 and DDR4-1 slots).

I found a really good deal for another 2x4gb sticks with the exact same model number, timings, latency, and exact same revision number. I am aware that this is often a gamble, but I want to try.

My question is: should I put the NEW ram into the remaining slots available (slots DDR4-4 and DDR4-3)? - in this case in channel A slots there would be 1 stick of the NEW ram I bought and 1 stick of the OLD ram I currently have, and the same would also apply to channel B.

OR should I make the configuration in a way that the OLD ram I currently have populates only channel A slots, and the NEW ram I bought populates only channel B slots?

OR does it not matter?

I hope I am being clear, if something is confusing I'll try to clear it up.

Thanks in advance!

[WereCat]

I have two same kits of 2x16GB and they work fine in any combination.

But its generally recommended to have the first kit in slot 2 and 4 (so as you have right now) and the other kit in the remaining slots. Shouldn't be an issue either way though.

[Moonzy]

have sticks from the same kit in 1 slot apart

meaning, run one stick from each kit in different channel

 

mixing RAM might not always work, though

and you can clear CMOS to see if it'll help

[Jurrunio]

it doesnt matter, just make sure you clear CMOS after that so the board trains the memory (or else it would try the old settings which could be unstable)

[Jaga848]

4 minutes ago, Jurrunio said:

it doesnt matter, just make sure you clear CMOS after that so the board trains the memory (or else it would try the old settings which could be unstable)

Do I need to clear cmos by removing the battery/shorting the 2 cmos pins or can I simply load optimized defaults in bios?

[Jurrunio]

7 minutes ago, Jaga848 said:

Do I need to clear cmos by removing the battery/shorting the 2 cmos pins or can I simply load optimized defaults in bios?

Need to remove battery or short pins, loading defaults doesn't work.

[Jaga848]

7 minutes ago, Jurrunio said:

Need to remove battery or short pins, loading defaults doesn't work.

Thanks, just one more question:

 

Since I want to test the two NEW sticks before I combine them with the ones I currently have, do I need to clear CMOS before turning on the PC with only the NEW ram sticks plugged in, and then again after combining all 4 of them, or do I need to clear CMOS only before using all 4 sticks combined, and not when testing the two NEW sticks?

[Jurrunio]

1 minute ago, Jaga848 said:

Since I want to test the two NEW sticks before I combine them with the ones I currently have, do I need to clear CMOS before turning on the PC with only the NEW ram sticks plugged in, and then again after combining all 4 of them, or do I need to clear CMOS only before using all 4 sticks combined, and not when testing the two NEW sticks?

every time you change the sticks used, you should clear CMOS.