A:AnswerThe Skytech support folks usually answer this by saying you get whatever card they currently have in stock, so its a crapshoot. Some may get ASUS, some MSI, some Gigabyte,
A:AnswerThe Legacy 3.0 comes with AIO cooler on CPU with 120mm fan as standard; it vents to the rear. You should be able to add an AIO with 240mm fans if you mount them facing forward (no room for 240 facing back). For spec and more info on Inwin 905 case look here: https://www.in-win.com/en/gaming-chassis/905/
HTH
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A:AnswerThe pictured "version" of the Legacy 3.0 machine features an Asrock z390 phantom gaming 4s/ac motherboard, but I understand that their components vary depending on what was available in the shop when they assembled the machine. So, its a surprise as to what brands of hardware you'll get except it will meet or exceed spec listed.