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GeForce GTX 285 1GB vs Radeon HD 5870

Intro

The GeForce GTX 285 1GB uses a 55 nm design. nVidia has clocked the core speed at 648 MHz. The GDDR3 memory is set to run at a frequency of 1242 MHz on this particular model. It features 240 SPUs along with 80 Texture Address Units and 32 ROPs.

Compare those specifications to the Radeon HD 5870, which comes with a clock speed of 850 MHz and a GDDR5 memory speed of 1200 MHz. It also features a 256-bit memory bus, and makes use of a 40 nm design. It is made up of 1600(320x5) SPUs, 80 TAUs, and 32 ROPs.

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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

In theory, the GeForce GTX 285 1GB should be just a bit faster than the Radeon HD 5870 overall. (explain)

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

Texel Rate

The Radeon HD 5870 should be much (approximately 31%) better at texture filtering 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 much (approximately 31%) more effective at FSAA than the GeForce GTX 285 1GB, and able to handle higher resolutions while still performing well. (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 maximum amount of information (measured in MB per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach 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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