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GeForce GTX 285 1GB vs Radeon HD 5870

Intro

The GeForce GTX 285 1GB comes with a GPU core speed of 648 MHz, and the 1024 MB of GDDR3 RAM is set to run at 1242 MHz through a 512-bit bus. It also features 240 Stream Processors, 80 Texture Address Units, and 32 ROPs.

Compare those specifications to the Radeon HD 5870, which comes with a GPU core clock speed of 850 MHz, and 1024 MB of GDDR5 memory set to run at 1200 MHz through a 256-bit bus. It also is comprised of 1600(320x5) Stream Processors, 80 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5870 188 Watts
GeForce GTX 285 1GB 204 Watts
Difference: 16 Watts (9%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 285 1GB is 4% faster than the Radeon HD 5870 overall, due to its greater data rate. (explain)

GeForce GTX 285 1GB 158976 MB/sec
Radeon HD 5870 153600 MB/sec
Difference: 5376 (4%)

Texel Rate

The Radeon HD 5870 is quite a bit (approximately 31%) better at AF than the GeForce GTX 285 1GB. (explain)

Radeon HD 5870 68000 Mtexels/sec
GeForce GTX 285 1GB 51840 Mtexels/sec
Difference: 16160 (31%)

Pixel Rate

The Radeon HD 5870 should be a lot (about 31%) more effective at full screen anti-aliasing than the GeForce GTX 285 1GB, and also should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 5870 27200 Mpixels/sec
GeForce GTX 285 1GB 20736 Mpixels/sec
Difference: 6464 (31%)

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 5870

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 5870
Manufacturer nVidia AMD
Year January 15, 2009 September 23, 2009
Code Name G200b Cypress XT
Memory 1024 MB 1024 MB
Core Speed 648 MHz 850 MHz
Memory Speed 2484 MHz 4800 MHz
Power (Max TDP) 204 watts 188 watts
Bandwidth 158976 MB/sec 153600 MB/sec
Texel Rate 51840 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 240 1600(320x5)
Texture Mapping Units 80 80
Render Output Units 32 32
Bus Type GDDR3 GDDR5
Bus Width 512-bit 256-bit
Fab Process 55 nm 40 nm
Transistors 1400 million 2154 million
Bus PCIe x16 2.0 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units by the core clock 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 in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also 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 potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 285 1GB

Amazon.com

Check prices at:

Radeon HD 5870

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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