Daniel_336 :
ya i replaced the motherboard and bought and switch the graphic card so it wud play call of cuty advance warfare. but now i wanna run 2 monitor so wouldn it be better i have a studio 540 2 with intel core 2 quad core? whcih on wud u upgrade?
You can run two monitors off a single video card.
No it won't be better if you use a system with an almost 10 year old CPU.
If you have a newer quad core AMD CPU, I'm guessing the FX 6300 and an R7 370 card you are fine with the system as is. If you want a faster computer, sell yours, build one around an Intel i5-6500 or similar chip with an nVidia 1060 video card.
Ibuypower is as good as any lower end pre-built system maker, they tend to go for flashy cases, numbers like how much GB of RAM they have, how many ghz the CPU has, and then save money by buying cheap parts, especially with power supplies and using last generation parts or cheaper motherboards and slow video cards.
I would not upgrade either of the systems.