Omar1015 :
VincentP :
The difference between these is size.
The actual size and components it can hold will depend on manufacturer.
Decide first what components you plan to use and then choose a case that is big enough for these.
So which type of case do you think I should go for for this build any recommendations https://pcpartpicker.com/user/PCGamer159/saved/mqPv6h
Looking at your parts, it's certainly not the system I would build.
The R9 290 has a TDP or 250W while the GTX 970 is faster and has a TDP of 145W.
The FX-8350 has a TDP of 125W while a Core i5 or Core i7 processor that will outperform this in most situations has a TDP of 84W.
The CX series power supplies are ok, but not great quality.
If you do choose the R9 290 and FX-8350, I would suggest a better quality 650W supply.
With a Core i5 or i7 and a GTX 970, a good quality 500W supply would be plenty.
Some suggestions with the more efficient components:
Any XFX 550W supply, e.g. XFX TS 550, XFX Pro 550, XFX Core 550
Rosewill Capstone 550
Antec HCG 620 or 620M
Seasonic S12G 550 or Seasonic G 550
Seasonic S12II 620
These all have higher rated models for the more power hungry components.
When it comes to your case, these components also make a difference. The more efficient components are dissipating that extra 146W (approximately) as heat. Think of two 60W light bulbs. The CPU and GPU fans have to work a lot harder (i.e. more noise) and then your case has to get rid of this heat.
Having only one graphics card, you could drop down to a micro-ATX motherboard.
My favourite case for a micro-ATX gaming system is the Silverstone TJ08-E. There are competing cases from Bitfenix and Corsair.
Staying with an ATX motherboard, you need a larger case.
The Silverstone Reven RV02-E is very good, and new cases like the RV03 and RV04 offer alternative layouts that may appeal to you.
The Silverstone Fortress FT02 and FT02 are more expensive versions of the RV02-E and RV04 that include aluminium for large parts of the case, sound proofing material and more subtle styling.
The Fractal Design R4 and XL are also larger cases that appear very good.
All the cases I have suggested have good cooling, dust filters and don't make a lot of noise.