My system:
- Housing of Coolest Master
- 500W power supply of beQuiet!
- Mainboard: Z77 Extreme4 Asrock
- Intel Core i5-3570 CPU @ 3.40GHz
- 16 GB of DDR3 RAM
- 256 GB SSD 840 Series Samung
- 512GB HDD WDC WD5000AAKX-00ERMA0
- SAPPHIRE R9 270X 4096MB GDDR5 (new)
Was concerned only that my power supply may not be sufficient, since it has only 500W and had my last card consumes only about 80W. But thanks to the included connectors (2x 6 pin) was there was no problem despite a lack of 6-pin connector.
Map humming softly to himself, all games will run at the highest level, eg Tomb Raider with TressFX.
So if you have to choose between the 2GB and 4GB version, I recommend to buy for only 20 charge it here.