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GeForce GTX 470 vs Radeon HD 6770 1GB

Intro

The GeForce GTX 470 makes use of a 40 nm design. nVidia has set the core speed at 607 MHz. The GDDR5 memory works at a frequency of 837 MHz on this model. It features 448 SPUs along with 56 TAUs and 40 ROPs.

Compare all that to the Radeon HD 6770 1GB, which makes use of a 40 nm design. AMD has set the core speed at 900 MHz. The GDDR5 memory runs at a frequency of 1050 MHz on this specific model. It features 800 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB 108 Watts
GeForce GTX 470 215 Watts
Difference: 107 Watts (99%)

Memory Bandwidth

In theory, the GeForce GTX 470 is 99% quicker than the Radeon HD 6770 1GB in general, due to its higher bandwidth. (explain)

GeForce GTX 470 133920 MB/sec
Radeon HD 6770 1GB 67200 MB/sec
Difference: 66720 (99%)

Texel Rate

The Radeon HD 6770 1GB is a little bit (approximately 6%) better at anisotropic filtering than the GeForce GTX 470. (explain)

Radeon HD 6770 1GB 36000 Mtexels/sec
GeForce GTX 470 33992 Mtexels/sec
Difference: 2008 (6%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 470 is a better choice, and very much so. (explain)

GeForce GTX 470 24280 Mpixels/sec
Radeon HD 6770 1GB 14400 Mpixels/sec
Difference: 9880 (69%)

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 470

Amazon.com

Radeon HD 6770 1GB

Amazon.com

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 470 Radeon HD 6770 1GB
Manufacturer nVidia AMD
Year March 2010 January 2011
Code Name GF100 Juniper XT
Fab Process 40 nm 40 nm
Bus PCIe x16 PCIe x16
Memory 1280 MB 1024 MB
Core Speed 607 MHz 900 MHz
Shader Speed 1215 MHz (N/A) MHz
Memory Speed 3348 MHz 4200 MHz
Unified Shaders 448 800
Texture Mapping Units 56 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) 215 watts 108 watts
Shader Model 5.0 5.0
Bandwidth 133920 MB/sec 67200 MB/sec
Texel Rate 33992 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 24280 Mpixels/sec 14400 Mpixels/sec

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster 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 number of texture units of the card by the core 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 processed in a second.

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

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