No, if you bought AND registered your MOBO there is no expiration that I can see on the confirmation email I got when I bought my 1080Ti cards,
even gave me two codes (one for each card) but what am I gonna do with 2? The only expiration on redemption is Dec 6th. You need both the code from your purchase (should have gotten an email from the retailer) and the serial to redeem it on the ASUS website. When you enter that info you will get an activation code to use at ubisoft.
purchase code redemption
https://www.asus.com/event/2017/rog/assassins-creed-origins/US/activation code redemption
https://uplay.ubi.comIf you have issues redemming
https://support.ubi.com
“Two things are infinite: the universe and human stupidity, I'm not sure about the former” ~ Albert Einstein