A:AnswerThere are two SATA ports on the motherboard, one of which is used by the built in SATA HDD. It looks like the second one could be used to add a SATA SSD.
A:AnswerHi Richard! The Omen GT12-0060 Gaming Desktop, has the Dorado motherboard. Here is a link to the specs. You can expand the motherboard section to find detailed configuration information.
https://support.hp.com/us-en/document/c06692693
A:AnswerWe apologize for the confusion on the pictures of the case for this desktop. We are working on getting the pictures upgraded. Here is a picture of what the desktop should look like: https://support.hp.com/us-en/product/omen-desktop-pc-25l-gt12-0000i/33492320/model/36682910
A:AnswerThe computer will be able to physically hold the cards when they're released later in 2020. The power supply for this computer is specifically made for it by CoolerMaster, and the 750 watt version is not currently available for retail sale.