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GeForce GTX 285 1GB vs Radeon HD 7850

Intro

The GeForce GTX 285 1GB uses a 55 nm design. nVidia has set the core frequency at 648 MHz. The GDDR3 memory is set to run at a frequency of 1242 MHz on this model. It features 240 SPUs as well as 80 TAUs and 32 ROPs.

Compare those specs to the Radeon HD 7850, which has GPU clock speed of 860 MHz, and 2048 MB of GDDR5 RAM set to run at 1200 MHz through a 256-bit bus. It also is comprised of 1024 SPUs, 64 TAUs, and 32 Raster Operation Units.

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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

In theory, the GeForce GTX 285 1GB should perform 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 should be a bit (approximately 6%) faster with regards to AF 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

The Radeon HD 7850 should be much (about 33%) faster with regards to full screen anti-aliasing than the GeForce GTX 285 1GB, and will be able to handle higher screen resolutions without losing too much performance. (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 information (in units of megabytes per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, the result should 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 AA, 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 worked out by multiplying the total amount 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max 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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