Weird, I'm on an i5 4570, GTX 1060 6Gb and 8Gb system mem with all set to max on 1920 x 1080
My base consisted of about ~7 rooms connected with walkways, a moonpool, scanner room, 2 upwards tunnels to two rooms above sea level with a view, with a Seamoth, Prawn Suit and Cyclops chilling around...