Which graphic card

The same one would be just fine, unless your planning to OC one then I would go with a Asus one, which they tend to make the best cooling solutions for the GPU's.

^ +1

Asus make the best cooling for GPU's, choose Asus if you're hoping to Overclock.

This is what i have to work with and most likly oc will soon or later come into the piture
so would you go with same or asus


COOLER MASTER HAF X RC-942-KKN1 Black Steel/ Plastic ATX Full Tower Computer Case

XFX Double D FX-787A-CDBC Radeon HD 7870 GHz Edition Black Edition 2GB 256-bit GDDR5 PCI Express 3.0 x16 HDCP Ready CrossFireX .

G.SKILL Ripjaws X Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL10D-16GBXLItem

1 x Intel Core i5-3570K Ivy Bridge 3.4GHz (3.8GHz Turbo) LGA 1155 77W Quad-Core Desktop Processor Intel HD Graphics 4000 BX80637I53570K--

1 x ASRock Z77 Extreme6/TB4 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard--

would the ASUS HD7950-DC2T-3GD5 Radeon HD 7950 3GB 384-bit GDDR5 PCI Express 3.0 x16 HDCP Ready CrossFireX Support Video Card make a good choice or do i have to stay in the 2gb range As you can tell by now this is my first xfire build and atill testing the waters.
any advice would be welcomed
thanks

I believe it has to be the same GB model. If the card you have now for example is 2gb, and you get the 7950 which is 3gb it will be locked at 2gb.