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GeForce GTX 285 1GB vs Radeon HD 7850

Intro

The GeForce GTX 285 1GB has a clock speed of 648 MHz and a GDDR3 memory frequency of 1242 MHz. It also makes use of a 512-bit bus, and makes use of a 55 nm design. It features 240 SPUs, 80 Texture Address Units, and 32 Raster Operation Units.

Compare that to the Radeon HD 7850, which has a clock speed of 860 MHz and a GDDR5 memory frequency of 1200 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It features 1024 SPUs, 64 Texture Address Units, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
GeForce GTX 285 1GB 204 Watts
Difference: 74 Watts (57%)

Memory Bandwidth

Theoretically, the GeForce GTX 285 1GB should be a small bit faster than the Radeon HD 7850 in general. (explain)

GeForce GTX 285 1GB 158976 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 5376 (4%)

Texel Rate

The Radeon HD 7850 will be a bit (more or less 6%) better at anisotropic filtering than the GeForce GTX 285 1GB. (explain)

Radeon HD 7850 55040 Mtexels/sec
GeForce GTX 285 1GB 51840 Mtexels/sec
Difference: 3200 (6%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7850 is superior to the GeForce GTX 285 1GB, by a large margin. (explain)

Radeon HD 7850 27520 Mpixels/sec
GeForce GTX 285 1GB 20736 Mpixels/sec
Difference: 6784 (33%)

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 1GB

Amazon.com

Check prices at:

Radeon HD 7850

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 1GB Radeon HD 7850
Manufacturer nVidia AMD
Year January 15, 2009 March 2012
Code Name G200b Pitcairn Pro
Memory 1024 MB 2048 MB
Core Speed 648 MHz 860 MHz
Memory Speed 2484 MHz 4800 MHz
Power (Max TDP) 204 watts 130 watts
Bandwidth 158976 MB/sec 153600 MB/sec
Texel Rate 51840 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 240 1024
Texture Mapping Units 80 64
Render Output Units 32 32
Bus Type GDDR3 GDDR5
Bus Width 512-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 1400 million 2800 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.1 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 are processed per second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the video 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 the video card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 285 1GB

Amazon.com

Check prices at:

Radeon HD 7850

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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