Radeon HD 4730 vs Radeon HD 4850 512MB

Intro

The Radeon HD 4730 comes with a GPU clock speed of 700 MHz, and the 512 MB of GDDR5 memory runs at 900 MHz through a 128-bit bus. It also is comprised of 640(128x5) Stream Processors, 32 Texture Address Units, and 8 ROPs.

Compare all that to the Radeon HD 4850 512MB, which features a clock speed of 625 MHz and a GDDR3 memory speed of 993 MHz. It also features a 256-bit memory bus, and uses a 55 nm design. It is comprised of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

Price Comparison

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

Radeon HD 4730 Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Radeon HD 4850 512MB Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	Radeon HD 4730	Radeon HD 4850 512MB
Manufacturer	ATi	ATi
Year	Jun 8, 2009	Jun 25, 2008
Code Name	RV770/CE	RV770 PRO
Fab Process	55 nm	55 nm
Bus	PCIe 2.0 x16	PCIe 2.0 x16
Memory	512 MB	512 MB
Core Speed	700 MHz	625 MHz
Shader Speed	N/A MHz	(N/A) MHz
Memory Speed	900 MHz	993 MHz
Unified Shaders	640(128x5)	800(160x5)
Texture Mapping Units	32	40
Render Output Units	8	16
Bus Type	GDDR5	GDDR3
Bus Width	128-bit	256-bit
DirectX Version	DirectX 10.1	DirectX 10.1
OpenGL Version	OpenGL 3.0	OpenGL 3.0
Power (Max TDP)	140 watts	110 watts
Shader Model	4.1	4.1
Bandwidth	57600 MB/sec	63552 MB/sec
Texel Rate	22400 Mtexels/sec	25000 Mtexels/sec
Pixel Rate	5600 Mpixels/sec	10000 Mpixels/sec

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.