128-bit GDDR5 memory interface

MicrosoftR DirectXR 10.1 support

Unified superscalar shader architecture

High performance vertex cache

Programmable tessellation unit

Accelerated geometry shaderpath for geometry amplification

Memory read/write cache for improved stream output performance

Multi- more...

* Graphics Engine - RADEON HD4850
* Video Memory - 512MB GDDR3
* Engine Clock - 625 MHz
* Memory Clock - 993MHz x 2
* Memory Interface - 256bit
* DirectX Support - 10.1
* Bus Standard - PCIE 2.0
* VGA Output Yes
* HDTV Output
* DVI Output DVI-I x more...

This card is pre overclocked and comes with a custom Artic Coolong cooler.
The latest PCS HD4730 has 640 streaming processors, clocks at 700MHz core and 900MHz memory respectively, with the fastest ever GDDR5 memory, it supports up to 3.6Gbps data rates. This offers an unbeatable gaming performance more...

There isnt too much info on this card on the ebuyer site, but the value is immense.

Graphics Engine - RADEON HD4870
Video Memory - 1GB GDDR5
Engine Clock - 770MHz
Memory Clock - 900MHz (3.6Gbps)
Memory Interface - 256bit
DirectX Support - 10.1
Bus Standard - PCI-Express 2.0

The ATI Radeon HD 4800 Series GPUs bring the power of graphics supercomputing to gamers, setting a new standard for visual computing. Redefine the way you play and take HD gaming to the extreme with best-in-class performance. The new TeraScale graphics engine delivers an immersive, cinematic gaming more...

Remember free delivery available at checkout.

"The ATI Radeon HD 4800 Series GPUs bring the power of graphics supercomputing to gamers, setting a new standard for visual computing. Redefine the way you play and take HD gaming to the extreme with best-in-class performance. The new TeraScale graphics more...

Have updated to reflect new prices!

Cheapest I've seen it for, first post, sorry if I've cocked up somewhere!

Graphics Engine - RADEON HD4850
Video Memory - 512MB GDDR3
Engine Clock - 625MHz
Memory Clock - 993MHz(1986Mbps)
Memory Interface - 256bit
DirectX Support - 10.1
Bus Standard - PCI-E 2.0

Transform Your PC with Intense 3D and High-Definition Visuals
The Radeon X1650 is designed to deliver outstanding entertainment and 3D graphics through its unique ultra-threaded core architecture and Avivo video and display technology. The Radeon X1650 is CrossFire Ready to deliver the ultimate gami more...

First of all, I can't find this exact card anywhere on the net, including the manufacturer's website, which is odd.

It's basically the standard card (Non-Extreme):
http://www.powercolor.com/global/main_product_detail.asp?id=136
plus a core overclock from 625MHz to 650MHz, and an Arctic Cooling Acc more...