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GeForce GTX 280 vs GeForce GTX 285 1GB

Intro

The GeForce GTX 280 comes with a GPU core speed of 602 MHz, and the 1024 MB of GDDR3 memory runs at 1107 MHz through a 512-bit bus. It also is made up of 240 Stream Processors, 80 Texture Address Units, and 32 ROPs.

Compare those specifications to the GeForce GTX 285 1GB, which makes use of a 55 nm design. nVidia has set the core frequency at 648 MHz. The GDDR3 RAM works at a speed of 1242 MHz on this model. It features 240 SPUs along with 80 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 285 1GB 204 Watts
GeForce GTX 280 236 Watts
Difference: 32 Watts (16%)

Memory Bandwidth

In theory, the GeForce GTX 285 1GB should be just a bit faster than the GeForce GTX 280 in general. (explain)

GeForce GTX 285 1GB 158976 MB/sec
GeForce GTX 280 141696 MB/sec
Difference: 17280 (12%)

Texel Rate

The GeForce GTX 285 1GB will be a bit (approximately 8%) more effective at AF than the GeForce GTX 280. (explain)

GeForce GTX 285 1GB 51840 Mtexels/sec
GeForce GTX 280 48160 Mtexels/sec
Difference: 3680 (8%)

Pixel Rate

The GeForce GTX 285 1GB is just a bit (approximately 8%) more effective at full screen anti-aliasing than the GeForce GTX 280, and will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 285 1GB 20736 Mpixels/sec
GeForce GTX 280 19264 Mpixels/sec
Difference: 1472 (8%)

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:

GeForce GTX 285 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 GeForce GTX 285 1GB
Manufacturer nVidia nVidia
Year June 17, 2008 January 15, 2009
Code Name G200 G200b
Memory 1024 MB 1024 MB
Core Speed 602 MHz 648 MHz
Memory Speed 2214 MHz 2484 MHz
Power (Max TDP) 236 watts 204 watts
Bandwidth 141696 MB/sec 158976 MB/sec
Texel Rate 48160 Mtexels/sec 51840 Mtexels/sec
Pixel Rate 19264 Mpixels/sec 20736 Mpixels/sec
Unified Shaders 240 240
Texture Mapping Units 80 80
Render Output Units 32 32
Bus Type GDDR3 GDDR3
Bus Width 512-bit 512-bit
Fab Process 65 nm 55 nm
Transistors 1400 million 1400 million
Bus PCIe x16 2.0 PCIe x16 2.0
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.1 OpenGL 3.1

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 280

Amazon.com

Check prices at:

GeForce GTX 285 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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