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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 frequency at 607 MHz. The GDDR5 memory runs at a speed of 837 MHz on this specific card. It features 448 SPUs as well as 56 TAUs and 40 ROPs.

Compare those specifications to the Radeon HD 6770 1GB, which features a GPU core clock speed of 900 MHz, and 1024 MB of GDDR5 memory running at 1050 MHz through a 128-bit bus. It also features 800 SPUs, 40 Texture Address Units, and 16 ROPs.

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

As far as performance goes, the GeForce GTX 470 should in theory be much superior to the Radeon HD 6770 1GB in general. (explain)

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

Texel Rate

The Radeon HD 6770 1GB should be just a bit (more or less 6%) better at texture 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 using 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: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 number of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at handling 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 could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

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