[SOLVED] Can i add another DDR4 1x8 which has a different frequency the others 3x8 and still overclock?

[filipeduard]

Hello. I had 4x8 vengeance 2133mhz c13 on a 6700k for a while but one ram failed after some trouble i had with my pc and i had to change the mboard(to a z270 asus) because the last one was dead(z170 gb). Now i have 3x8 (24gb) , and if i try to OC it doesn't want let me pass the 2600mhz( like i'm stable in 2600 (1.29V but if go with 2666 and any voltage from 1.29 to 1.35 it just doesn't boot ) but with 2x8 i can pass to 3000 in 1.345V stable. I don't find anyone selling a single dimm of ( cmk16gx4m2a2133c13 ) the ram i have so if i buy a 3000mhz one like this one ( https://www.ebay.com/itm/Corsair-CMK8GX4M1D3000C16-Vengeance-LPX-8GB-DDR4-DRAM-3000MHz-C15-Memory-Black/283895751946?epid=23031095293&hash=item421981650a:g:S0UAAOSw7O9e0UZ1 ) .
Will that work to OC still or will i have some problems because of the differences in delay and frequency ?
Also , I don't use any xmp profile , i just do my own oc , i found that it works better for me.
Thank you!

 

[rgd1101]

mixing ram sometime works, sometime don't

 

[geofelt]

Ram is sold in kits for a reason.
A motherboard must manage all the ram using the same specs of voltage, cas and speed.
The internal workings are designed for the capacity of the kit.
Ram from the same vendor and part number can be made up of differing manufacturing components over time.
Some motherboards, can be very sensitive to this.
This is more difficult when more sticks are involved.

If you need 32gb, I suggest you buy a 2 x 16gb kit of the speed you want and sell the rest.
And, excepting some ram specific apps, the difference in fps or app performance between 2600 and 3000 speed is in the low single digits using a discrete graphics card.

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