GeForce GTX 580 vs Radeon HD 6770

Intro

The GeForce GTX 580 comes with a GPU core clock speed of 772 MHz, and the 1536 MB of GDDR5 RAM is set to run at 1002 MHz through a 384-bit bus. It also is made up of 512 Stream Processors, 64 TAUs, and 48 ROPs.

Compare those specs to the Radeon HD 6770, which comes with a clock speed of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It is made up of 800 SPUs, 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.

GeForce GTX 580 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 580	Radeon HD 6770
Manufacturer	nVidia	ATi
Year	November 2010	January 2011
Code Name	GF110	Juniper XT
Fab Process	40 nm	40 nm
Bus	PCIe x16	PCIe x16
Memory	1536 MB	512 MB
Core Speed	772 MHz	900 MHz
Shader Speed	1544 MHz	(N/A) MHz
Memory Speed	1002 MHz (4008 MHz effective)	1050 MHz (4200 MHz effective)
Unified Shaders	512	800
Texture Mapping Units	64	40
Render Output Units	48	16
Bus Type	GDDR5	GDDR5
Bus Width	384-bit	128-bit
DirectX Version	DirectX 11	DirectX 11
OpenGL Version	OpenGL 4.1	OpenGL 4.1
Power (Max TDP)	244 watts	108 watts
Shader Model	5.0	5.0
Bandwidth	192384 MB/sec	67200 MB/sec
Texel Rate	49408 Mtexels/sec	36000 Mtexels/sec
Pixel Rate	37056 Mpixels/sec	14400 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per 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 better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.