Radeon HD 4730 vs Radeon HD 4850 2GB

Intro

The Radeon HD 4730 uses a 55 nm design. ATi has clocked the core speed at 700 MHz. The GDDR5 memory runs at a frequency of 900 MHz on this particular model. It features 640(128x5) SPUs as well as 32 TAUs and 8 Rasterization Operator Units.

Compare those specs to the Radeon HD 4850 2GB, which uses a 55 nm design. ATi has clocked the core frequency at 625 MHz. The GDDR4 RAM works at a speed of 993 MHz on this particular card. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

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 2GB Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	Radeon HD 4730	Radeon HD 4850 2GB
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	2048 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	GDDR4
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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.