GeForce GTX 570 vs Radeon HD 6770

Intro

The GeForce GTX 570 features a core clock speed of 732 MHz and a GDDR5 memory speed of 950 MHz. It also uses a 320-bit memory bus, and uses a 40 nm design. It is made up of 480 SPUs, 60 Texture Address Units, and 40 Raster Operation Units.

Compare that to the Radeon HD 6770, which features a core clock frequency of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also uses a 128-bit bus, and makes use of a 40 nm design. It is made up of 800 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.

GeForce GTX 570 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	GeForce GTX 570	Radeon HD 6770
Manufacturer	nVidia	ATi
Year	December 2010	January 2011
Code Name	GF110	Juniper XT
Fab Process	40 nm	40 nm
Bus	PCIe x16	PCIe x16
Memory	1280 MB	512 MB
Core Speed	732 MHz	900 MHz
Shader Speed	1464 MHz	(N/A) MHz
Memory Speed	950 MHz	1050 MHz
Unified Shaders	480	800
Texture Mapping Units	60	40
Render Output Units	40	16
Bus Type	GDDR5	GDDR5
Bus Width	320-bit	128-bit
DirectX Version	DirectX 11	DirectX 11
OpenGL Version	OpenGL 4.1	OpenGL 4.1
Power (Max TDP)	219 watts	108 watts
Shader Model	5.0	5.0
Bandwidth	152000 MB/sec	67200 MB/sec
Texel Rate	43920 Mtexels/sec	36000 Mtexels/sec
Pixel Rate	29280 Mpixels/sec	14400 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of data (in units of MB per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must 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, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.