Question I currently have 2x8GB RAM (DDR4-2400) in my PC. I just bought 2x16GB (DDR4-3200). Should I take out the 2x8GB RAM?

Valachio

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Oct 17, 2013
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I bought a pre-built PC with 16GB (2x8) of RAM at DDR4, at 2400mhz.

I just bought 32GB (2x16) of RAM at 3200mhz.

The motherboard has 4 RAM slots.

I was wondering if I should just stick my new sticks of RAM into the 2 unused slots? Or should I just get rid of the 2x8's and use only the 2x16's?

From my research, it seems it should have no problem, but I read that there will be performance issues because the clock speeds are different?
 

clutchc

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Which CPU/motherboard?
Probably OK to leave it all in if you need it. The slower stuff should run at its rated speed and the faster stuff at its (if you don't OC). Most modern boards use some form of flex memory mode.
 

Valachio

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Oct 17, 2013
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Which CPU/motherboard?
Probably OK to leave it all in if you need it. The slower stuff should run at its rated speed and the faster stuff at its (if you don't OC). Most modern boards use some form of flex memory mode.
Motherboard: Asrock X570 Phantom Gaming 4-CB
CPU: Ryzen 9 3900x

I don't plan to OC the 32GB sticks.

So you are saying that the 32GB will run at 3200 and the 16GB will run at 2400?
 

clutchc

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Motherboard: Asrock X570 Phantom Gaming 4-CB
CPU: Ryzen 9 3900x

I don't plan to OC the 32GB sticks.

So you are saying that the 32GB will run at 3200 and the 16GB will run at 2400?
I mis-spoke. After further thought, they will all initially run at the same, slower ram speed unless you OC them to the faster ram speed. You'll have to try it on that particulare board and see. They will likely initially default to the CPU's default memory controller speed and then you would have to use AXMP to set a faster speed if you need it. But the slower RAM may not be stable at 3200MHz.
 
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