Question Ram configuration question

[RemoWilliams84]

I have a new motherboard, cpu and ram on the way and I have a question about the ram configuration. As you can see from the list below, I already have 16 gigs of older/slower ddr4 and I'm also getting 16 gigs of new ram. Should I just toss the old ram or install both. If I install both, what should the configuration look like? Any issues with having two different speeds?



AMD - Ryzen 7 3800X 3.9 GHz 8-Core
Gigabyte - X570 AORUS MASTER ATX AM4 Motherboard
GeIL - EVO POTENZA 16 GB (2 x 8 GB) DDR4-2133 Memory (old ram)
Patriot - Viper 4 16 GB (2 x 8 GB) DDR4-3400 Memory (new ram)
EVGA - GeForce RTX 2080 Ti 11 GB Black Video Card
Phanteks - Enthoo Pro ATX Full Tower Case
EVGA - SuperNOVA G2 850 W 80+ Gold Certified Fully Modular ATX Power Supply

 

[jay32267]

I wouldn't use the old RAM unless you absolutely need 32 GB.
I think 16 GB is plenty for gaming.
Also....if you use the old RAM I think there's a good chance the MB will downclock all the RAM to 2133....and then what good is that new 3400 speed fast RAM?

 

[cryoburner]

Yeah, all the RAM needs to run at the same speed, so it will revert to the lowest performance with the old RAM installed. If you have no use for it, sell the old RAM am make maybe $40-$50 off of it.

 

[RemoWilliams84]

Kind of what I was thinking. Thanks for the confirmation guys!