Are these parts all compatible/will they work together?

BloodyAces4

Honorable
Sep 11, 2013
6
0
10,510
Hi, I'm wondering if all these parts are compatible, I've researched most, but not so sure.
SPECS:
-Motherboard ATX DDR3 1333 LGA 1150 Motherboards Z87-G45
-Corsair Vengeance 8 GB ( 2 x 4 GB ) DDR3 1600 MHz (PC3 12800) 240-Pin DDR3 Memory Kit
-Intel Core i5-4670K Quad-Core Desktop Processor 3.4 GHZ 6 MB Cache
-Corsair Builder Series CX 500 Watt ATX/EPS 80 PLUS (CX500)
-WD Green 2 TB Desktop Hard Drive: 3.5 Inch, SATA III, 64 MB Cache
(CASE. not as important but this is what I'm hoping to use)
-Cooler Master HAF 922 - Mid Tower Computer Case with High Airflow and USB 3.0

Here is my other question. I have an XFX ATI Radeon HD6670 1 GB DDR3 VGA/DVI/HDMI PCI-Express Video Card and I was wondering if I'd be able to run 2 on the same motherboard. The motherboard SAYS there are 3x PCI-e 3.0 and 4x PCI-e 2.0. Since I looked it up, it said that the video card will block the second PCI-e. IDK if that means that you can't run 2 of those video cards or it'll block another PCI-e slot. So basically, since the motherboard has 3x PCI-e 3.0's I was wondering if I'd be able to run two, but the second one would be spaced out. If I am able to run these what would be the max things I can play? ALSO, I already have one of the video cards, but none of the other parts (so I'm running on a backup PC), so if I'd be able to, could I get a different graphics card and they'd work together? ONE last question, would the 500w work for all? Or would I have to get a better one, if so, recommend me one. I hope you understand what I'm saying.

Short summary: are all the parts compatible and would I be able to use dual XFX ATI Radeon HD6670 1 GB DDR3 VGA/DVI/HDMI PCI-Express Video Card
 

BloodyAces4

Honorable
Sep 11, 2013
6
0
10,510


Is this the one you're talking about? http://www.amazon.com/Sapphire-Radeon-PCI-Express-Graphics-11201-17-20G/dp/B00A0HZOEA/ref=sr_1_1?ie=UTF8&qid=1378983771&sr=8-1&keywords=hd+radeon+7770 If thats so it seems you're able to run dual of these. If you can please reply so I know that these are the ones I should. Thanks for tjhe suggestion! These seem good already!