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GeForce GTX 280 vs Radeon R9 285

Intro

The GeForce GTX 280 has a core clock speed of 602 MHz and a GDDR3 memory frequency of 1107 MHz. It also features a 512-bit bus, and uses a 65 nm design. It features 240 SPUs, 80 Texture Address Units, and 32 ROPs.

Compare those specs to the Radeon R9 285, which comes with a clock speed of 918 MHz and a GDDR5 memory speed of 1375 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It is made up of 1792 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 285 190 Watts
GeForce GTX 280 236 Watts
Difference: 46 Watts (24%)

Memory Bandwidth

In theory, the Radeon R9 285 will be 24% faster than the GeForce GTX 280 overall, because of its greater bandwidth. (explain)

Radeon R9 285 176000 MB/sec
GeForce GTX 280 141696 MB/sec
Difference: 34304 (24%)

Texel Rate

The Radeon R9 285 will be quite a bit (about 113%) more effective at texture filtering than the GeForce GTX 280. (explain)

Radeon R9 285 102816 Mtexels/sec
GeForce GTX 280 48160 Mtexels/sec
Difference: 54656 (113%)

Pixel Rate

The Radeon R9 285 will be much (about 52%) better at FSAA than the GeForce GTX 280, and also capable of handling higher screen resolutions better. (explain)

Radeon R9 285 29376 Mpixels/sec
GeForce GTX 280 19264 Mpixels/sec
Difference: 10112 (52%)

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 R9 285

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 R9 285
Manufacturer nVidia AMD
Year June 17, 2008 September 2014
Code Name G200 Tonga PRO
Memory 1024 MB 2048 MB
Core Speed 602 MHz 918 MHz
Memory Speed 2214 MHz 5500 MHz
Power (Max TDP) 236 watts 190 watts
Bandwidth 141696 MB/sec 176000 MB/sec
Texel Rate 48160 Mtexels/sec 102816 Mtexels/sec
Pixel Rate 19264 Mpixels/sec 29376 Mpixels/sec
Unified Shaders 240 1792
Texture Mapping Units 80 112
Render Output Units 32 32
Bus Type GDDR3 GDDR5
Bus Width 512-bit 256-bit
Fab Process 65 nm 28 nm
Transistors 1400 million 5000 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 12.0
OpenGL Version OpenGL 3.1 OpenGL 4.4

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total amount of texture units of the card 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 applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units 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 output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce GTX 280

Amazon.com

Check prices at:

Radeon R9 285

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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