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GeForce GTX 280 vs Radeon HD 6770 1GB

Intro

The GeForce GTX 280 features a clock frequency of 602 MHz and a GDDR3 memory speed of 1107 MHz. It also features a 512-bit bus, and makes use of a 65 nm design. It features 240 SPUs, 80 TAUs, and 32 Raster Operation Units.

Compare those specifications to the Radeon HD 6770 1GB, which uses a 40 nm design. AMD has set the core speed at 900 MHz. The GDDR5 RAM is set to run at a speed of 1050 MHz on this card. It features 800 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770 1GB 108 Watts
GeForce GTX 280 236 Watts
Difference: 128 Watts (119%)

Memory Bandwidth

The GeForce GTX 280 should in theory be much faster than the Radeon HD 6770 1GB overall. (explain)

GeForce GTX 280 141696 MB/sec
Radeon HD 6770 1GB 67200 MB/sec
Difference: 74496 (111%)

Texel Rate

The GeForce GTX 280 is a lot (about 34%) more effective at anisotropic filtering than the Radeon HD 6770 1GB. (explain)

GeForce GTX 280 48160 Mtexels/sec
Radeon HD 6770 1GB 36000 Mtexels/sec
Difference: 12160 (34%)

Pixel Rate

The GeForce GTX 280 will be quite a bit (about 34%) faster with regards to FSAA than the Radeon HD 6770 1GB, and able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 280 19264 Mpixels/sec
Radeon HD 6770 1GB 14400 Mpixels/sec
Difference: 4864 (34%)

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 280

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 280 Radeon HD 6770 1GB
Manufacturer nVidia AMD
Year June 17, 2008 January 2011
Code Name G200 Juniper XT
Memory 1024 MB 1024 MB
Core Speed 602 MHz 900 MHz
Memory Speed 2214 MHz 4200 MHz
Power (Max TDP) 236 watts 108 watts
Bandwidth 141696 MB/sec 67200 MB/sec
Texel Rate 48160 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 19264 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 240 800
Texture Mapping Units 80 40
Render Output Units 32 16
Bus Type GDDR3 GDDR5
Bus Width 512-bit 128-bit
Fab Process 65 nm 40 nm
Transistors 1400 million 1040 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of information (in units of megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If 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, High Dynamic Range and high resolutions.

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

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

Display Prices

Hide Prices

GeForce GTX 280

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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