Radeon HD 5670 vs Radeon HD 5770

Intro

The Radeon HD 5670 features core speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 400(80x5) SPUs as well as 20 Texture Address Units and 8 Rasterization Operator Units.

Compare all of that to the Radeon HD 5770, which has a clock speed of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also features a 128-bit memory bus, and makes use of a 40 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, 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 5670 Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Radeon HD 5770 Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	Radeon HD 5670	Radeon HD 5770
Manufacturer	ATi	ATi
Year	January 14, 2010	October 13, 2009
Code Name	Redwood XT	Juniper XT
Fab Process	40 nm	40 nm
Bus	PCIe 2.1 x16	PCIe 2.1 x16
Memory	1024 MB	1024 MB
Core Speed	775 MHz	850 MHz
Shader Speed	N/A MHz	(N/A) MHz
Memory Speed	1000 MHz (4000 MHz effective)	1200 MHz (4800 MHz effective)
Unified Shaders	400(80x5)	800(160x5)
Texture Mapping Units	20	40
Render Output Units	8	16
Bus Type	GDDR5	GDDR5
Bus Width	128-bit	128-bit
DirectX Version	DirectX 11	DirectX 11
OpenGL Version	OpenGL 3.2	OpenGL 3.2
Power (Max TDP)	61 watts	108 watts
Shader Model	5.0	5.0
Bandwidth	64000 MB/sec	76800 MB/sec
Texel Rate	15500 Mtexels/sec	34000 Mtexels/sec
Pixel Rate	6200 Mpixels/sec	13600 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of information (counted in megabytes per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 amount of pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.