Upgraded to DUAL CHANNEL - tRAS and tRFC are different from the 1st RAM stick

Darkbreeze

Retired Mod
Your best bet would be to manually set the speed of both sticks to 2133mhz in the bios and set ALL of the primary and secondary timings to Auto, or just set the main configuration setting to it's default auto setting WITH a manually setting of 2133mhz for both sticks.

Let the system train the memory and figure out what will work. It won't be perfect, not nearly as good as the timings on a pair or quad set of matched sticks, but since you've mixed speeds and models, it's probably your best chance unless you want to manually configure the primary and secondary timings that are not already set to auto, on the new stick, to match those of your 2133mhz stick.

You'll likely have far better success simply setting the speed for both sticks to 2133mhz and letting the system auto configure the rest of the timings than by trying to use any built in profiles or manually configuring timings if you lack experience doing so, which obviously you do.
 

luckymatt42

Upstanding
May 23, 2018
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Mixing sticks is always a bad idea, certainly with memory at different speeds. Always best to buy memory as a "kit"...that is don't buy 2 sticks of 8gb separately, buy a package that contains two ram sticks for 16gb total.

You can certainly try it, and it might actually boot, but it will NOT be happy about it.
 

Darkbreeze

Retired Mod
Your best bet would be to manually set the speed of both sticks to 2133mhz in the bios and set ALL of the primary and secondary timings to Auto, or just set the main configuration setting to it's default auto setting WITH a manually setting of 2133mhz for both sticks.

Let the system train the memory and figure out what will work. It won't be perfect, not nearly as good as the timings on a pair or quad set of matched sticks, but since you've mixed speeds and models, it's probably your best chance unless you want to manually configure the primary and secondary timings that are not already set to auto, on the new stick, to match those of your 2133mhz stick.

You'll likely have far better success simply setting the speed for both sticks to 2133mhz and letting the system auto configure the rest of the timings than by trying to use any built in profiles or manually configuring timings if you lack experience doing so, which obviously you do.
 

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