Radeon HD 6570 (OEM) 2GB vs Radeon HD 6770

Intro

The Radeon HD 6570 (OEM) 2GB makes use of a 40 nm design. ATi has clocked the core frequency at 650 MHz. The GDDR5 RAM is set to run at a frequency of 1000 MHz on this particular card. It features 480 SPUs as well as 24 Texture Address Units and 8 ROPs.

Compare all that to the Radeon HD 6770, which uses a 40 nm design. ATi has set the core frequency at 900 MHz. The GDDR5 memory is set to run at a speed of 1050 MHz on this model. It features 800 SPUs along with 40 Texture Address Units 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 6570 (OEM) 2GB Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Radeon HD 6770 Amazon.com Other US-based stores Amazon.co.uk Amazon.de Amazon.fr

Specifications

Model	Radeon HD 6570 (OEM) 2GB	Radeon HD 6770
Manufacturer	ATi	ATi
Year	February 2011	January 2011
Code Name	Turks	Juniper XT
Fab Process	40 nm	40 nm
Bus	PCIe 2.1 x16	PCIe x16
Memory	1024 MB	512 MB
Core Speed	650 MHz	900 MHz
Shader Speed	N/A MHz	(N/A) MHz
Memory Speed	1000 MHz	1050 MHz
Unified Shaders	480	800
Texture Mapping Units	24	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 4.1	OpenGL 4.1
Power (Max TDP)	50 watts	108 watts
Shader Model	5.0	5.0
Bandwidth	64000 MB/sec	67200 MB/sec
Texel Rate	15600 Mtexels/sec	36000 Mtexels/sec
Pixel Rate	5200 Mpixels/sec	14400 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 most pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.