Mobo-GPU question

[XFA24]

so my specs are as what follows
CPU: Intel Core i3 550 3.2 GHz
GPU: Power Color Radeon HD 5570 1 GB DDR3
RAM: G.Skill Ripjaws 1x4 GB DDR3 1333
PSU: Seasonic M12II
MOBO: ASUS P7H55-M LX

so I am planning to upgrade my GPU and make it to a Sapphire Radeon HD 7850 2GB DDR5 OC Ed
and I dont plan to upgrade any other parts such as the CPU and the MOBO.

so my question is, would the Sapphire Radeon HD 7850 applicable to the MOBO.
here is the link for the MOBO (For Reference Only) --> http://www.asus.com/Motherboards/Intel_Socket_1156/P7H55M_LX/#MSL
here is the link for the 7850 (For Reference Only) --> http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1160&pid=1499&psn=&lid=1&leg=0
here is the link for the 5570 (For Reference Only) --> http://www.powercolor.com/us/products_features.asp?id=228

IF and only IF the Sapphire Radeon HD 7850 is applicable to the MOBO, would it be a good the 7850 be a good buy?
and also, does the performance of the Sapphire and Power Color differ from each other? because the Power Color is way cheaper..

thanks in advance guys!

 

[Ravyu]

Yes the HD 7850 will easily work with your motherboard as you have the correct slots (PCIe x2.1)

Yes the HD 7850 is a good buy if you are on a budget.

Sapphire tends to have better reliability and better cooler and this one is factory overclocked, where as powercolor is the reference cooler, which isn't good for overclocking imho, and is not factory OC'ed

 

[XFA24]

Yes the HD 7850 will easily work with your motherboard as you have the correct slots (PCIe x2.1)

Yes the HD 7850 is a good buy if you are on a budget.

Sapphire tends to have better reliability and better cooler and this one is factory overclocked, where as powercolor is the reference cooler, which isn't good for overclocking imho, and is not factory OC'ed

As I remember, my mobo have only a PCIe 2.0 slot and not a 2.1, is it backwards compatible?

 

[Ravyu]

As I remember, my mobo have only a PCIe 2.0 slot and not a 2.1, is it backwards compatible?

Whoops, didn't see that.

Yes it will still be compatible

 

[XFA24]

Best answer selected by XFA24.

 

[XFA24]

Whoops, didn't see that.

Yes it will still be compatible

Thanks for the help!