Help with video card/motherboard compatibility please!

[Newbiefag123]

Ok guys, so the thing is that I'm planning to buy a video card and I have this motherboard: http://www.gigabyte.com/products/product-page.aspx?pid=4406#sp.
My options are:
In the best case:
- https://www.msi.com/Graphics-card/GTX-950-GAMING-2G.html
- http://www.evga.com/Products/ProductList.aspx?type=0&family=GeForce+900+Series+Family&chipset=GTX+950
The option is most likely to happen:
- https://www.asus.com/Graphics-Cards/GTX750TIOC2GD5/
- https://us.msi.com/Graphics-card/N750Ti-TF-2GD5OC.html#hero-overview
In the worst case:
- http://www.sapphiretech.com/productdetial.asp?pid=B4DBE4FA-071A-4291-B92E-F4434BD796FA&lang=esp
- http://www.evga.com/Products/Product.aspx?pn=02G-P4-3747-KR
The question is, will they fit on my motherboard? Any of them? Will there be problems if I put them in? btw, i'm using a 550 watt 80plus psu.
Thanks for reading, sorry for bad redaction.

 

[ThatVietGuy]

Any of those GPU will work in your motherboard.

 

[Newbiefag123]

Where are you planning on buying from? What is your budget? Are you in the US?

I am chilean and I live here. See, it would be difficult to tell you my budget because here the prices are all different. I think the 750 ti is around 130 dollars, here it is around 130.000 chilean pesos. 1 dolar = 700 clp. The 750 ti is almost 200 dollars here, but I can't import it because I need to make sure I have the warranty. Anyways, will the size of the videocards affect? Thanks

 

[Newbiefag123]

Any of those GPU will work in your motherboard.

Sure? No problem with the size of the cards?

 

[ThatVietGuy]

The size is more of an issue for your case.

 

[Newbiefag123]

The size is more of an issue for your case.

Explain yourself please. None of them will work or what?

 

[ThatVietGuy]

What's there to explain? Length of GPUs are usually an issue because of the the case.

Some GPUs are too long for some cases. Rarely does the length of the GPU have any relationship with the motherboard.

 

[Newbiefag123]

What's there to explain? Length of GPUs are usually an issue because of the the case.

Some GPUs are too long for some cases. Rarely does the length of the GPU have any relationship with the motherboard.

I thought it would have problems with the m-atx m/b size. That's all I wanted to know. Thanks a lot.