Unless you'd benefit from having 24GB over 16 I'd just use the 8GB pair. What's the PC used for?
Mostly Photo editing (lightroom / photoshop), occasional use of 3d rendering software too.
I'm guessing that 24 is better than 16 for that sort of thing?
@RonnieOatmilk started
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Unless you'd benefit from having 24GB over 16 I'd just use the 8GB pair. What's the PC used for?