Hi. first post so be gentle 
I'm wanting to buy a new graphics card for my custom built pc, using a 1gb Nvidia 220 GT haven't liked the card since I first bought it. Being seriously thinking of switching over to ATI.
Cannot decide on between these cards
ATI Radeon 4890
ATI Radeon 5770
Wanting to play directx 11 games

I'm wanting to buy a new graphics card for my custom built pc, using a 1gb Nvidia 220 GT haven't liked the card since I first bought it. Being seriously thinking of switching over to ATI.
Cannot decide on between these cards
ATI Radeon 4890
ATI Radeon 5770
Wanting to play directx 11 games
My Computer
- Computer Manufacturer/Model Number
- Custom System
- OS
- Windows 7 Professional 64 Bit
- CPU
- AMD Phenom II X4 955 Processor, 3.2GHz
- Motherboard
- Asus M4A89GTD PRO/USB3
- Memory
- 4Gb DDR3 1333
- Graphics Card(s)
- XFX ATI Radeon HD 5770 1Gb
- Sound Card
- Realtek Onboard Audio
- Monitor(s) Displays
- LG Flatron 22"
- Screen Resolution
- 1920 x 1080
- Hard Drives
- Western Digital Black 1Tb
- PSU
- Corsair HX750