Hello to all. Question I have a server pc one HP z220 with 1790 Motherboard. Lovely system fast CPU is the Xeon 1225 v2. 4 core. Based on the above what's the best GPU I can get away with my PSU is 400watts continues. I only have four fans, a main SSD for win 10 Pro. No PCI-e extras. 16GB DDR3 1600 over two of four dimms, according to one PSU usage site I'm using only 120watts currently. So what's the biggest best card I could power and if not a single card dual cards. Thanks All