Yes — these are compatible
Yes — compatible: 16GB DDR5 (1x16GB) with Z790. Z790 boards ship in DDR4 and DDR5 variants — make sure your specific board is a DDR5 model. Live eBay prices.
Z790
16GB DDR5 (1x16GB)Cheapest tracked eBay listings across 7 markets, refreshed each scrape.