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GeForce GTX 280 vs Radeon HD 6770 1GB

Intro

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

Compare all of that to the Radeon HD 6770 1GB, which makes use of a 40 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 memory is set to run at a frequency of 1050 MHz on this model. It features 800 SPUs along with 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

Theoretically, the GeForce GTX 280 should perform quite a bit 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 will be quite a bit (more or less 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 will be quite a bit (approximately 34%) faster with regards to FSAA than the Radeon HD 6770 1GB, and able to handle higher screen 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

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: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units by the core 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 one second.

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