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GeForce GTX 285 2GB vs Radeon HD 7870 XT

Intro

The GeForce GTX 285 2GB makes use of a 55 nm design. nVidia has clocked the core speed at 648 MHz. The GDDR3 RAM works at a frequency of 1242 MHz on this specific card. It features 240 SPUs as well as 80 Texture Address Units and 32 Rasterization Operator Units.

Compare all of that to the Radeon HD 7870 XT, which features clock speeds of 925 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs along with 96 Texture Address Units and 32 ROPs.

Display Graphs

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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

Theoretically, the Radeon HD 7870 XT should be a lot faster than the GeForce GTX 285 2GB overall. (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 will be much (about 71%) faster with regards to 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

The Radeon HD 7870 XT is much (approximately 43%) more effective at anti-aliasing than the GeForce GTX 285 2GB, and will be able to handle higher screen resolutions without losing too much performance. (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: Bandwidth is the largest amount of data (in units of MB per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the card will be at 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 the video card could possibly record to its local memory in one 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 output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach 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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