Radeon HD 4730 vs Radeon HD 6770 1GB

Intro

The Radeon HD 4730 comes with a GPU core clock speed of 700 MHz, and the 512 MB of GDDR5 RAM is set to run at 900 MHz through a 128-bit bus. It also features 640(128x5) Stream Processors, 32 Texture Address Units, and 8 Raster Operation Units.

Compare those specs to the Radeon HD 6770 1GB, which comes with a GPU core clock speed of 900 MHz, and 1024 MB of GDDR5 memory running at 1050 MHz through a 128-bit bus. It also is made up of 800 Stream Processors, 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 6770 1GB Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	Radeon HD 4730	Radeon HD 6770 1GB
Manufacturer	ATi	ATi
Year	Jun 8, 2009	January 2011
Code Name	RV770/CE	Juniper XT
Fab Process	55 nm	40 nm
Bus	PCIe 2.0 x16	PCIe x16
Memory	512 MB	1024 MB
Core Speed	700 MHz	900 MHz
Shader Speed	N/A MHz	(N/A) MHz
Memory Speed	900 MHz	1050 MHz
Unified Shaders	640(128x5)	800
Texture Mapping Units	32	40
Render Output Units	8	16
Bus Type	GDDR5	GDDR5
Bus Width	128-bit	128-bit
DirectX Version	DirectX 10.1	DirectX 11
OpenGL Version	OpenGL 3.0	OpenGL 4.1
Power (Max TDP)	140 watts	108 watts
Shader Model	4.1	5.0
Bandwidth	57600 MB/sec	67200 MB/sec
Texel Rate	22400 Mtexels/sec	36000 Mtexels/sec
Pixel Rate	5600 Mpixels/sec	14400 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.