ATI Radeon HD 5450 Graphics Card is better?

T-Man has correctly listed the cards in order of performance, kudos to him. However, some of those prices you've listed seem rather high. Have you looked at Ebuyer and Aria?

Also, the Radeon HD 5770 is a discontinued model, it's been replaced by the 6770. http://www.ebuyer.com/338547-sapphire-hd... http://www.aria.co.uk/Products/Component... http://www.ebuyer.com/272568-powercolor-... http://www.aria.co.uk/Products/Components/Graphics+Cards+-+AMD/Radeon+HD+6770/ASUS+Radeon+HD+6770+1024MB+GDDR5+PCI-Express+Graphics+Card+?productId=46426 Any of those cards would be major upgrades from where you are- what you have currently is approximately equal to the slowest card on the chart below (Radeon HD 5450). http://www.techpowerup.com/reviews/Zotac/GeForce_GT_520/10.html As for the power requirements... the GeForce GTS 450 & Radeon HD 5770 require a 400-450 watt power supply which provides a dedicated 6-pin connector.

The Radeon HD 6850 requires a 500 watt power supply with a 6-pin connector. So for those cards, you might need to invest in a new PSU, as well. However the Radeon HD 6670 and 7750 are low power consumption models which don't require any external power connector.

Those cards work fine on most stock 300-400 watt power supplies. So the first step - find your computer's power supply rating. For that, you'll have to open your computer case and read the label.

If your PSU is 250 watts or lower, you'll need a new PSU to support ANY decent graphics card upgrade. The Corsair 430W and OCZ 500W are good deals at their respective prices, if it comes to that. However, if your existing PSU is 400 watts or higher, you should be fine installing a 6670 or 7750.

The Radeon HD 7750 is probably your best choice. It's the newest card with the lowest power consumption, and due to some advancements in the card design, it performs much better than the 6670 in Skyrim. In fact, it even matches the 5770/6770 in that particular game.

http://www.techpowerup.com/reviews/ASUS/HD_7750/21.html.

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