Help with new graphics card

[Showgo]

I'm in need of a new graphics card, since i haven't upgraded my computer once in the 4 years that i have had it, and i can no longer play new games on high settings as i once could. I'm neither a total noob when it comes to computer tech but im far from a expert which is why im looking for help on these forums

Since my computer is being repaired atm, and i wont have it back until monday i can't tell you my specs yet, but currently looking at two graphics cards which seem affordable and pretty good.

The first card that im looking at is the:

Sapphire ATI Radeon HD 5770 1024MB GDDR5 PCI-Express Graphics Card
- Core Clock: 850MHz
- Memory: 1024MB GDDR5
- Memory Clock: 4800MHz (Effective)
- Memory Bandwidth: 76.8GB/s
- Processing Cores: 800
- Bus Type: PCI-Express 2.1
- Display Connectors: 2 Dual-Link DVI-I, 1 HDMI & 1 DisplayPort
- HDCP Capable
- DirectX 11 Support
- OpenGL 3.2 Support
- ATI CrossFireX Ready
- ATI Eyefinity Technology
- ATI Avivo HD
- ATI Stream Technology
- Warranty: 2 Years
http://www.overclockers.co.uk/showproduct.php?prodid=GX-216-SP&groupid=701&catid=56&subcat=1515

The other is:

Sapphire ATI Radeon HD 5850 Extreme 1024MB GDDR5 PCI-Express Graphics Card
- Core Clock: 725MHz
- Memory: 1024MB GDDR5
- Memory Clock: 4000MHz (Effective)
- Memory Bandwidth: 128.0GB/s
- Processing Cores: 1440
- Bus Type: PCI-Express 2.1
- Display Connectors: 1 Dual-Link DVI-I, 1 HDMI & 1 DisplayPort
- HDCP Capable
- DirectX 11 Support
- OpenGL 3.2 Support
- ATI CrossFireX Ready
- ATI Eyefinity Technology
- ATI Avivo HD
- ATI Stream Technology
- 2yr Warranty
http://www.overclockers.co.uk/showproduct.php?prodid=GX-259-SP


They are in the same price range but i can't really figure out which one dominates the other. If there are any other graphics cards out there that are better and cost around 100 pounds/euros in europe, please link to the site

 

[Perkomate]

the 5770 is a newer card; i believe that the 5870 has been discontinued. I personally have the 5770 and it is amazing, I am told that it can max Crysis 2. I'm getting a copy tomorrow and will post back with how high. the 5770 is the best for the price that is available right now