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GeForce GTX 580 3GB vs Radeon HD 6770 1GB

Intro

The GeForce GTX 580 3GB has a clock speed of 772 MHz and a GDDR5 memory speed of 1002 MHz. It also features a 384-bit memory bus, and uses a 40 nm design. It is comprised of 512 SPUs, 64 TAUs, and 48 Raster Operation Units.

Compare all of that to the Radeon HD 6770 1GB, which features GPU clock speed of 900 MHz, and 1024 MB of GDDR5 memory set to run at 1050 MHz through a 128-bit bus. It also is made up of 800 Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB 108 Watts
GeForce GTX 580 3GB 244 Watts
Difference: 136 Watts (126%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 580 3GB will be 186% quicker than the Radeon HD 6770 1GB overall, due to its greater data rate. (explain)

GeForce GTX 580 3GB 192384 MB/sec
Radeon HD 6770 1GB 67200 MB/sec
Difference: 125184 (186%)

Texel Rate

The GeForce GTX 580 3GB should be quite a bit (more or less 37%) more effective at texture filtering than the Radeon HD 6770 1GB. (explain)

GeForce GTX 580 3GB 49408 Mtexels/sec
Radeon HD 6770 1GB 36000 Mtexels/sec
Difference: 13408 (37%)

Pixel Rate

The GeForce GTX 580 3GB is a lot (about 157%) better at FSAA than the Radeon HD 6770 1GB, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 580 3GB 37056 Mpixels/sec
Radeon HD 6770 1GB 14400 Mpixels/sec
Difference: 22656 (157%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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GeForce GTX 580 3GB

Amazon.com

Check prices at:

Radeon HD 6770 1GB

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GTX 580 3GB Radeon HD 6770 1GB
Manufacturer nVidia AMD
Year November 2010 January 2011
Code Name GF110 Juniper XT
Memory 3072 MB 1024 MB
Core Speed 772 MHz 900 MHz
Memory Speed 4008 MHz 4200 MHz
Power (Max TDP) 244 watts 108 watts
Bandwidth 192384 MB/sec 67200 MB/sec
Texel Rate 49408 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 512 800
Texture Mapping Units 64 40
Render Output Units 48 16
Bus Type GDDR5 GDDR5
Bus Width 384-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 3000 million 1040 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 580 3GB

Amazon.com

Check prices at:

Radeon HD 6770 1GB

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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