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GeForce GTX 580 vs Radeon HD 4890 1GB

Intro

The GeForce GTX 580 has a core clock speed of 772 MHz and a GDDR5 memory frequency of 1002 MHz. It also makes use of a 384-bit bus, and uses a 40 nm design. It is made up of 512 SPUs, 64 TAUs, and 48 ROPs.

Compare those specs to the Radeon HD 4890 1GB, which has a core clock frequency of 1000 MHz and a GDDR5 memory speed of 975 MHz. It also makes use of a 256-bit bus, and makes use of a 55 nm design. It is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4890 1GB 190 Watts
GeForce GTX 580 244 Watts
Difference: 54 Watts (28%)

Memory Bandwidth

Theoretically, the GeForce GTX 580 should perform much faster than the Radeon HD 4890 1GB in general. (explain)

GeForce GTX 580 192384 MB/sec
Radeon HD 4890 1GB 124800 MB/sec
Difference: 67584 (54%)

Texel Rate

The GeForce GTX 580 is a lot (about 24%) more effective at anisotropic filtering than the Radeon HD 4890 1GB. (explain)

GeForce GTX 580 49408 Mtexels/sec
Radeon HD 4890 1GB 40000 Mtexels/sec
Difference: 9408 (24%)

Pixel Rate

The GeForce GTX 580 will be much (about 132%) better at FSAA than the Radeon HD 4890 1GB, and should be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 580 37056 Mpixels/sec
Radeon HD 4890 1GB 16000 Mpixels/sec
Difference: 21056 (132%)

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 580

Amazon.com

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Radeon HD 4890 1GB

Amazon.com

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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 580 Radeon HD 4890 1GB
Manufacturer nVidia AMD
Year November 2010 Apr 2, 2009
Code Name GF110 RV790 XT
Memory 1536 MB 1024 MB
Core Speed 772 MHz 1000 MHz
Memory Speed 4008 MHz 3900 MHz
Power (Max TDP) 244 watts 190 watts
Bandwidth 192384 MB/sec 124800 MB/sec
Texel Rate 49408 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 512 800(160x5)
Texture Mapping Units 64 40
Render Output Units 48 16
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 40 nm 55 nm
Transistors 3000 million 959 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many 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

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GeForce GTX 580

Amazon.com

Check prices at:

Radeon HD 4890 1GB

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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