Protex

From the motherboard page -
Supports DDR4-2133 Memory The only consideration would be clearance from the height of the RAM and an air cooler.

By editing, are you referring to video editing? What programs would you use in your workflow? Depending on this, you may benefit in a high core count and the Ryzen CPU lineup may be the way to go.

Haha!
 
Welcome to the glorious world of computer marketing!
 
In short, GB != GiB
 
Windows measures using the smaller one while the manufacturers measure with the larger number. 
 
https://www.quora.com/What-is-the-Difference-between-GiB-and-GB

Not a Single one! Think about a Card from 2007 that would be usable today?!

Seeing those crash reports would be very useful to diagnose the issue. Does this happen in other games than H1Z1?

It might seem stupid, but check the switch on the outside of the PSU next to the power cable is enabled. @420RetroCop

Ebay Links are not allowed. 

Not knowledgeable about Pentium CPUs, but looking at some benchmarks, Oh lord yes, I'd split the money between a CPU and GPU or save up longer to get a new CPU and GPU.

I apologise

If you currently have a working laptop, don't buy another, instead go for the performance of a desktop and use the Mac as your portable / school work. This video on the topic may be of interest to you ; 
 

I currently own an RL2455HM, and love it, great response time, does what it says on the tin, and good for the price. Would recommend, only downside is the bezel is rather thick, and it is only 60Hz.

Where the hell did he say "$500"? Like seriously that number was nowhere in this post until you brought it up.

I can pull it apart and rebuild it. It's a more viable solution than building a friends expensive rig, I can do all the research I want but I've never even fitted RAM.

why not a 6600k and a 1070? 

See if you could get a weekend job at a computer shop near you. They'll take you on hopefully, although you'll have to be 14 at a minimum in the UK.

If you currently have a working laptop, don't buy another, instead go for the performance of a desktop and use the Mac as your portable / school work. This video on the topic may be of interest to you ;