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GeForce GTX 280 vs Radeon HD 6770 1GB

Intro

The GeForce GTX 280 uses a 65 nm design. nVidia has set the core speed at 602 MHz. The GDDR3 RAM works at a speed of 1107 MHz on this model. It features 240 SPUs as well as 80 TAUs and 32 ROPs.

Compare those specifications to the Radeon HD 6770 1GB, which features a clock frequency of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It features 800 SPUs, 40 TAUs, 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 280 236 Watts
Difference: 128 Watts (119%)

Memory Bandwidth

The GeForce GTX 280, in theory, should be quite a bit faster than the Radeon HD 6770 1GB in general. (explain)

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

Texel Rate

The GeForce GTX 280 will be a lot (about 34%) faster with regards to AF 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 is quite a bit (approximately 34%) more effective at full screen anti-aliasing than the Radeon HD 6770 1GB, and also will be capable of handling higher resolutions without losing too much performance. (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

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Radeon HD 6770 1GB

Amazon.com

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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: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units of the card by the core clock 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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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.

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