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GeForce GTX 285 2GB vs Radeon HD 7870 XT

Intro

The GeForce GTX 285 2GB features clock speeds of 648 MHz on the GPU, and 1242 MHz on the 2048 MB of GDDR3 RAM. It features 240 SPUs as well as 80 TAUs and 32 ROPs.

Compare those specifications to the Radeon HD 7870 XT, which uses a 28 nm design. AMD has set the core frequency at 925 MHz. The GDDR5 RAM runs at a speed of 1500 MHz on this specific card. It features 1536 SPUs along with 96 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 XT 185 Watts
GeForce GTX 285 2GB 204 Watts
Difference: 19 Watts (10%)

Memory Bandwidth

Performance-wise, the Radeon HD 7870 XT should in theory be quite a bit better than the GeForce GTX 285 2GB in general. (explain)

Radeon HD 7870 XT 192000 MB/sec
GeForce GTX 285 2GB 158976 MB/sec
Difference: 33024 (21%)

Texel Rate

The Radeon HD 7870 XT should be a lot (more or less 71%) better at AF than the GeForce GTX 285 2GB. (explain)

Radeon HD 7870 XT 88800 Mtexels/sec
GeForce GTX 285 2GB 51840 Mtexels/sec
Difference: 36960 (71%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7870 XT is superior to the GeForce GTX 285 2GB, and very much so. (explain)

Radeon HD 7870 XT 29600 Mpixels/sec
GeForce GTX 285 2GB 20736 Mpixels/sec
Difference: 8864 (43%)

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 285 2GB

Amazon.com

Check prices at:

Radeon HD 7870 XT

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 285 2GB Radeon HD 7870 XT
Manufacturer nVidia AMD
Year January 15, 2009 November 2012
Code Name G200b Tahiti LE
Memory 2048 MB 2048 MB
Core Speed 648 MHz 925 MHz
Memory Speed 2484 MHz 6000 MHz
Power (Max TDP) 204 watts 185 watts
Bandwidth 158976 MB/sec 192000 MB/sec
Texel Rate 51840 Mtexels/sec 88800 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 240 1536
Texture Mapping Units 80 96
Render Output Units 32 32
Bus Type GDDR3 GDDR5
Bus Width 512-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 1400 million 4313 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.1 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record 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 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, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 285 2GB

Amazon.com

Check prices at:

Radeon HD 7870 XT

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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