So I bought this computer 6 years ago or so and as I've learned over the years of getting some more knowledge, the parts were really wonky even then.
Now I did invest in another mobo and CPU a couple years back, but when I encountered some weird issues upon installing them I've just left them in their boxes all this time.
All being said, my desktop has performed fairly good throughout the years. The main reason I want to upgrade at this point is I want a second monitor. The one I've been looking at is the Acer 27" LED XF270HUA, which I can get at a decent discount. To facilitate this though, I guess I'll need a new GPU as mine only has 1GB of memory and in general is old n shitty (I believe it's right about this one http://www.gigabyte.us/Graphics-Card/GV-R695OC-1GD#ov).
Now for a new GPU, I was thinking something along the lines of a ASUS GeForce GTX 1070 8GB ROG STRIX DC3 OC. It featues 2 DP outlets which I understand is to prefer above HDMI, and is in general a strong card.
I realize I should probably look into getting my mobo & CPU actually installed, or even getting new ones all together, but other than that is there anything with my thought process that is flawed? Also, is there anything I'd need to think about regarding these purchases such as old connectors not supporting the GPU or more CPU power needed for the monitor or anything along those lines? For example, would my CPU get a higher load due to the second monitor (currently running only one)?