What if I overclock my ram when i have 2 different types?

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I have 2 different brands of ram in my system, which importantly have 2 very different clock speeds. One is about 600 mhz lower than the other, and of course your pc defaults to the lowest clock speed for your ram. I unplugged my two sticks that are low clock speed and then overclocked my good RAM to the highest stable overclock it can handle. The issue that I have now run into is that 16gb is literally right on the verge of not enough RAM for the game I am trying to play, but the overclock has made a severe difference in the frame rate. Almost a 30 fps difference. I know, crazy, but its true. If I plug the other sticks back in, and keep the current clock rate of my RAM, what will happen? If I can not have the RAM clocked to that rate with the other sticks in, is there a way to overclock RAM on a per slot basis? I have the ASUS EUFI bios. Thanks guys I know this question makes me look like im an idiot but id like to save the 60 dollars if i can.
 
What speed/make/model are both sets of RAM?

If you have two different sets of ram with different speeds and apply an overclock, then it will apply to all of the RAM. If all of the sticks cannot handle it you will likely experience instability or random memory errors e.g. Blue screens / Crashes.
It's entirely possible though that the lower clocked RAM might handle an overclock though - (e.g. lower rated speed ram was often "binned" from higher chips towards the end of it's production life, when most chips met the higher speed ratings e.g) - it all depends what RAM we are talking about

I struggle to believe that a ram overclock will actually add 30fps though - what game / resolution is this? what cpu have you got? The rest of your system specs would be helpful
 
600 Mhz slower is a lot, but modern DDR4 with low speeds (e.g. 2400) tends to overclock pretty well.

I know, crazy, but its true. If I plug the other sticks back in, and keep the current clock rate of my RAM, what will happen?

Hard for us to say without more details, but it's worth a try at the very least.
 
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