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GeForce GTX 285 1GB vs Radeon HD 6850

Intro

The GeForce GTX 285 1GB features clock speeds of 648 MHz on the GPU, and 1242 MHz on the 1024 MB of GDDR3 RAM. It features 240 SPUs along with 80 Texture Address Units and 32 Rasterization Operator Units.

Compare all of that to the Radeon HD 6850, which comes with clock speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 960 SPUs as well as 48 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
GeForce GTX 285 1GB 204 Watts
Difference: 77 Watts (61%)

Memory Bandwidth

Performance-wise, the GeForce GTX 285 1GB should in theory be much better than the Radeon HD 6850 in general. (explain)

GeForce GTX 285 1GB 158976 MB/sec
Radeon HD 6850 128000 MB/sec
Difference: 30976 (24%)

Texel Rate

The GeForce GTX 285 1GB will be a lot (more or less 39%) better at anisotropic filtering than the Radeon HD 6850. (explain)

GeForce GTX 285 1GB 51840 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 14640 (39%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6850 is a better choice, but not by far. (explain)

Radeon HD 6850 24800 Mpixels/sec
GeForce GTX 285 1GB 20736 Mpixels/sec
Difference: 4064 (20%)

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

Radeon HD 6850

Amazon.com

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 6850
Manufacturer nVidia AMD
Year January 15, 2009 October 2010
Code Name G200b Barts Pro
Memory 1024 MB 1024 MB
Core Speed 648 MHz 775 MHz
Memory Speed 2484 MHz 4000 MHz
Power (Max TDP) 204 watts 127 watts
Bandwidth 158976 MB/sec 128000 MB/sec
Texel Rate 51840 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 24800 Mpixels/sec
Unified Shaders 240 960
Texture Mapping Units 80 48
Render Output Units 32 32
Bus Type GDDR3 GDDR5
Bus Width 512-bit 256-bit
Fab Process 55 nm 40 nm
Transistors 1400 million 1700 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Comments

One Response to “GeForce GTX 285 1GB vs Radeon HD 6850”
Duda Configuracion says:

[...] tinca mas la 285 ---------- Post added at 19:31 ---------- Previous post was at 19:27 ---------- GeForce GTX 285 1GB vs Radeon HD 6850 – Performance Comparison Benchmarks @ Hardware Compare ---------- Post added at 23:29 ---------- Previous post was at 19:31 ---------- Pucha ayudenme [...]

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