Any (good)upgrade abilities on this PC?

[AshSkills]

i bought this Compaq 2700 about 2 years ago with no knowledge in PC and now i regret it(a lot) so i want to know if i can have any good upgrades and make it Run games like DayZ, battlefield and more on high or ultra settings. I wanted to build a gaming PC from Scratch but decided to upgrade it since it would probably cost less. I want to upgrade my processor, RAM, and graphics Card (i dont think i actually have one) and if you have any advice it would be much appreciated

Motherboard specs: http://support.hp.com/us-en/product/Compaq-CQ2000-Desktop-PC-series/3832626/document/c03036757/

PC: http://support.hp.com/us-en/product/Compaq-CQ2700-Desktop-PC-series/5156350/model/5256277/product-info?sku=B2H41EA

What should i get?

 

[VincentP]

There isn't much you can do with this.
It has an external power supply that isn't powerful enough to install a graphics card.

 

[Chass1990]

that mobo doesn't even have a PCI-e slot lol build from scratch and use this one as a network HTPC

 

[Gracodana]

None without a pci-e slot what sort of budget do you have and we could sort something out.