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GeForce GTX 285 1GB vs Radeon HD 5850

Intro

The GeForce GTX 285 1GB uses a 55 nm design. nVidia has clocked the core frequency at 648 MHz. The GDDR3 RAM is set to run at a frequency of 1242 MHz on this particular card. It features 240 SPUs as well as 80 TAUs and 32 Rasterization Operator Units.

Compare all of that to the Radeon HD 5850, which has a clock speed of 725 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 256-bit memory bus, and makes use of a 40 nm design. It is comprised of 1440(288x5) SPUs, 72 TAUs, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5850 151 Watts
GeForce GTX 285 1GB 204 Watts
Difference: 53 Watts (35%)

Memory Bandwidth

In theory, the GeForce GTX 285 1GB should be 24% quicker than the Radeon HD 5850 in general, because of its higher data rate. (explain)

GeForce GTX 285 1GB 158976 MB/sec
Radeon HD 5850 128000 MB/sec
Difference: 30976 (24%)

Texel Rate

The Radeon HD 5850 will be a bit (about 1%) better at anisotropic filtering than the GeForce GTX 285 1GB. (explain)

Radeon HD 5850 52200 Mtexels/sec
GeForce GTX 285 1GB 51840 Mtexels/sec
Difference: 360 (1%)

Pixel Rate

The Radeon HD 5850 will be just a bit (about 12%) better at anti-aliasing than the GeForce GTX 285 1GB, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 5850 23200 Mpixels/sec
GeForce GTX 285 1GB 20736 Mpixels/sec
Difference: 2464 (12%)

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 5850

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 5850
Manufacturer nVidia AMD
Year January 15, 2009 September 30, 2009
Code Name G200b Cypress PRO
Memory 1024 MB 1024 MB
Core Speed 648 MHz 725 MHz
Memory Speed 2484 MHz 4000 MHz
Power (Max TDP) 204 watts 151 watts
Bandwidth 158976 MB/sec 128000 MB/sec
Texel Rate 51840 Mtexels/sec 52200 Mtexels/sec
Pixel Rate 20736 Mpixels/sec 23200 Mpixels/sec
Unified Shaders 240 1440(288x5)
Texture Mapping Units 80 72
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. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the card's clock speed. 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 fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 285 1GB

Amazon.com

Check prices at:

Radeon HD 5850

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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