Does the Z790 use DDR4 or DDR5?

Z790 boards exist in both DDR4 and DDR5 versions — the chipset supports either, so check the specific board model before buying memory.

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Yes — these are compatible

Is the Core i5-12400F compatible with Z790?

Yes — compatible: Core i5-12400F + Z790. Socket LGA1700 matches. Live eBay prices for both.

✓ Socket compatible

Spec

Core i5-12400F

Z790

Socket

LGA1700

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Peak power

117W

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Memory

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DDR4 or DDR5 (board variant)

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Core i5-12400F

Z790

Socket LGA1700 matches. They share the same CPU socket, so the chip physically fits.