Like SAPPHIRE’s high end graphics cards, the new HD 4730 uses the latest GDDR5 memory and the powerful graphics architectures from the ATI division of AMD, incorporating multi-purpose stream processing units, integrated memory management architecture and on-chip hardware video decoding.
SAPPHIRE HD 4730 has 640 stream processors – twice as many as previous generation mid-range cards - and core clock speed of 750MHz - faster than competing products - together with 512MB of GDDR5 memory with a 128-bit interface clocked at 900MHz (3600MHz effective).
The SAPPHIRE HD 4730 delivers excellent performance for gaming or image rendering at a competitive price point. 

• 640 stream processors
• GDDR5 memory
• DirectX® 10.1 support
• 24xcustom filter anti-aliasing (CFAA) and high performancetropic filtering
• Dual mode ATI CrossFireX™ multi-GPU support for highly scalable performances
• PCI Express® 2.0 support
• Built-in HDMI with 7.1 surround sound support

ATI Radeon ™ Windows 7 Driver has been certified by the Windows Hardware Quality Lab (WHQL) the first day of initiation of the certification program. For users of the ATI Radeon ™ HD 2000, HD 3000 and HD 4000 series, ATI's software suite Catalyst ™ offers:
Stability and reliability of industry-leading driver.
Full support WDDM 1.1 WHQL certificate under Windows 7.
Innovation planned performance and new features every month.

With ATI's Stream, the owners of graphics cards ATI Radeon ™ HD 4800, HD 4700 and HD 4600 Series can download and use the ATI Video Converter Free.
Allows you to accelerate the conversion of standard and HD movies in multiple formats for use on various consumer electronic devices. With ATI Video Converter, movie, lasting an hour can be converted into a format for portable reader in approximately 12 minutes, ie 17 times faster than they are at the sole CPU. And that's not all: ATI Video Converter provides a video conversion is up to two times faster than competing solutions, but at a cost significantly lower.

How does it work?
ATI Stream allows the GPU to work in combination with the CPU giving a better balance of the platform and to carry out complex calculations faster than ever.

How can you be?
First, buy a graphics card ATI Radeon HD 4000 Series. Then download the ATI Catalyst software suite ™. I's free and allows you to unlock the technology ATI Stream. It is really simple.