First Computer Build Help

[Drumstix4]

Hi all,
I've been wanting to build my own computer for a while now, i have saved up, and i'm going to do it, it will be my first build.
Just need some help with compatibility, not quite sure if it all works together. (Coz you guys are pro, and i'm still learning)

Case: NZXT Guardian 921RB
http://www.pccasegear.com/index.php?main_page=product_info&cPath=25_238&products_id=15716

Processor: AMD Phenom II X4 955 Black Edition
http://www.pccasegear.com/index.php?main_page=product_info&cPath=187_345&products_id=11301

Motherboard: Gigabyte GA-870A-UD3 Rev2
http://www.pccasegear.com/index.php?main_page=product_info&cPath=138_803&products_id=14750

Hard Drive: Western Digital Caviar Blue 1TB (7200RPM)
http://www.pccasegear.com/index.php?main_page=product_info&products_id=14251

RAM: G.Skill Ripjaws F3-10666CL9D-4GBRL (2x2GB) DDR3
http://www.pccasegear.com/index.php?main_page=product_info&cPath=186_538_913&products_id=13599

Graphics Card: Gainward GeForce GTS 450 1GB
http://www.pccasegear.com/index.php?main_page=product_info&cPath=193_876&products_id=15530

Power Supply: OCZ ModXStream Pro 700W
http://www.pccasegear.com/index.php?main_page=product_info&cPath=15_305&products_id=12402

Disk Drive: Sony AD7240SGB
http://www.pccasegear.com/index.php?main_page=product_info&cPath=658_667&products_id=12865

I don't plan on spending too much, this costs around $900.
Any suggestions would be awesome.
This is just a stater comp, and i possibly will upgrade from this.

Thanks

 

[tj107us]

The XFX 5770 Video card is also a good card around the same price. It is easly OC'd to 900Mhz over the 850Mhz stock setting with no aditional cooling needed. It run Crysis on high settings and stays around 30-40fps some times it does drop down to 20-25fps but only when high details explosions and stuff like that. But it is up to you though.

 

[Drumstix4]

The XFX 5770 Video card is also a good card around the same price.

Do you have a link to one?
Also, do you know if everything is compatible with everything?

Cheers


Does anybody know if its all compatible?