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GeForce GTX 285 2GB vs Radeon HD 6870

Intro

The GeForce GTX 285 2GB features a clock speed of 648 MHz and a GDDR3 memory speed of 1242 MHz. It also makes use of a 512-bit memory bus, and uses a 55 nm design. It is comprised of 240 SPUs, 80 TAUs, and 32 Raster Operation Units.

Compare all that to the Radeon HD 6870, which has a clock speed of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also uses a 256-bit bus, and makes use of a 40 nm design. It is comprised of 1120 SPUs, 56 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6870 151 Watts
GeForce GTX 285 2GB 204 Watts
Difference: 53 Watts (35%)

Memory Bandwidth

The GeForce GTX 285 2GB should in theory perform a small bit faster than the Radeon HD 6870 in general. (explain)

GeForce GTX 285 2GB 158976 MB/sec
Radeon HD 6870 134400 MB/sec
Difference: 24576 (18%)

Texel Rate

The GeForce GTX 285 2GB will be a bit (about 3%) better at anisotropic filtering than the Radeon HD 6870. (explain)

GeForce GTX 285 2GB 51840 Mtexels/sec
Radeon HD 6870 50400 Mtexels/sec
Difference: 1440 (3%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 6870 is superior to the GeForce GTX 285 2GB, by far. (explain)

Radeon HD 6870 28800 Mpixels/sec
GeForce GTX 285 2GB 20736 Mpixels/sec
Difference: 8064 (39%)

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 6870

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 6870
Manufacturer nVidia AMD
Year January 15, 2009 October 2010
Code Name G200b Barts XT
Memory 2048 MB 1024 MB
Core Speed 648 MHz 900 MHz
Memory Speed 2484 MHz 4200 MHz
Power (Max TDP) 204 watts 151 watts
Bandwidth 158976 MB/sec 134400 MB/sec
Texel Rate 51840 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 240 1120
Texture Mapping Units 80 56
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 largest amount of information (measured in MB per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 285 2GB

Amazon.com

Check prices at:

Radeon HD 6870

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.

Comments

One Response to “GeForce GTX 285 2GB vs Radeon HD 6870”
GTX 295 - Warto? - Overclocking Forum - OCForum.pl says:

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