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GeForce GTX 280 vs Radeon HD 6870

Intro

The GeForce GTX 280 features a GPU clock speed of 602 MHz, and the 1024 MB of GDDR3 RAM is set to run at 1107 MHz through a 512-bit bus. It also is comprised of 240 Stream Processors, 80 Texture Address Units, and 32 ROPs.

Compare those specifications to the Radeon HD 6870, which uses a 40 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 memory works at a speed of 1050 MHz on this card. It features 1120 SPUs as well as 56 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6870 151 Watts
GeForce GTX 280 236 Watts
Difference: 85 Watts (56%)

Memory Bandwidth

Performance-wise, the GeForce GTX 280 should theoretically be a small bit superior to the Radeon HD 6870 in general. (explain)

GeForce GTX 280 141696 MB/sec
Radeon HD 6870 134400 MB/sec
Difference: 7296 (5%)

Texel Rate

The Radeon HD 6870 should be just a bit (about 5%) more effective at AF than the GeForce GTX 280. (explain)

Radeon HD 6870 50400 Mtexels/sec
GeForce GTX 280 48160 Mtexels/sec
Difference: 2240 (5%)

Pixel Rate

The Radeon HD 6870 should be quite a bit (more or less 50%) faster with regards to full screen anti-aliasing than the GeForce GTX 280, and should be capable of handling higher screen resolutions better. (explain)

Radeon HD 6870 28800 Mpixels/sec
GeForce GTX 280 19264 Mpixels/sec
Difference: 9536 (50%)

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 6870

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 6870
Manufacturer nVidia AMD
Year June 17, 2008 October 2010
Code Name G200 Barts XT
Memory 1024 MB 1024 MB
Core Speed 602 MHz 900 MHz
Memory Speed 2214 MHz 4200 MHz
Power (Max TDP) 236 watts 151 watts
Bandwidth 141696 MB/sec 134400 MB/sec
Texel Rate 48160 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 19264 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 240 1120
Texture Mapping Units 80 56
Render Output Units 32 32
Bus Type GDDR3 GDDR5
Bus Width 512-bit 256-bit
Fab Process 65 nm 40 nm
Transistors 1400 million 1700 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 max amount of information (in units of megabytes per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock 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 lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 280

Amazon.com

Check prices at:

Radeon HD 6870

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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