Does all my hardware support eachother?

[restllesss]

Intel® Core™ i5-3570K
ASUS P8Z77-V LX
Club 3D Radeon HD 7870 GHz Edition
also a little worried about the case if everything will fit in it.

Cooler Master CM 690 II Advanced

 

[Khalan]

Shouldn't have any problem with it.

The case will accommodate up to a 304mm GPU; and yours is 242mm. There's also plenty of room for the motherboard.

Edit:
Numbers sourced from http://www.coolermaster.com/product.php?product_id=6638 and http://www.club-3d.com/index.php/products/reader.en/product/radeon-hd-7870-ghz-edition.html

 

[mysticldagger]

Ive got a problem similar to you !! Do you think that the P8Z77 V LX will support the Sapphire Radeon HD 7870 ?

 

[garrettk4]

if it has a pci 3.0 express slot yes for full speed, pci express slots are backwards compatible with the older versions.