active adapter

I m going to buy a Motherboard capable of 3 display but I m hesitant because of one small detail which says The DVI-D port does not support D-Sub connection by adapter. I have 3 Monitors, a Dell U2414H with DisplayPort, a 24inch Hisense with HDMI, and a 15.6 inch Philips monitor with only VGA...

I have tried to get 144hz with this combo but because my monitor only has HDMI DVI and DVI-D and my graphics card only has Display Port and HDMI I was unable to get 144hz. Until I bought an active cable to connect DVI-D to Display Port and it worked! But now I have a message on my monitor...

I have found all my files in one folder. I wonder if I can delete all the other files/folders like the other User Folders that don't have files in them and the folders like Program Files and Logs since they're from the old computer anyway?

will my mobo have no problems regarding the video card? I use 400watts psu

Whats considered a reasonable temperature for gpus and cpus? my gpu stays at like 30-35° when idle and the cpu varies from 35-45° when idle. and when Im gaming the gpu gets up to 60-65° and the cpu is similar but a little higher, depending on the game. ive been running some games like farcry...