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GeForce GTX 580 3GB vs Radeon HD 4870 2GB

Intro

The GeForce GTX 580 3GB features a GPU core clock speed of 772 MHz, and the 3072 MB of GDDR5 RAM is set to run at 1002 MHz through a 384-bit bus. It also features 512 SPUs, 64 Texture Address Units, and 48 Raster Operation Units.

Compare that to the Radeon HD 4870 2GB, which comes with GPU clock speed of 750 MHz, and 2048 MB of GDDR5 memory running at 900 MHz through a 256-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4870 2GB 150 Watts
GeForce GTX 580 3GB 244 Watts
Difference: 94 Watts (63%)

Memory Bandwidth

In theory, the GeForce GTX 580 3GB is 67% faster than the Radeon HD 4870 2GB overall, because of its higher data rate. (explain)

GeForce GTX 580 3GB 192384 MB/sec
Radeon HD 4870 2GB 115200 MB/sec
Difference: 77184 (67%)

Texel Rate

The GeForce GTX 580 3GB should be a lot (approximately 65%) faster with regards to anisotropic filtering than the Radeon HD 4870 2GB. (explain)

GeForce GTX 580 3GB 49408 Mtexels/sec
Radeon HD 4870 2GB 30000 Mtexels/sec
Difference: 19408 (65%)

Pixel Rate

The GeForce GTX 580 3GB will be much (approximately 209%) more effective at AA than the Radeon HD 4870 2GB, and also capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 580 3GB 37056 Mpixels/sec
Radeon HD 4870 2GB 12000 Mpixels/sec
Difference: 25056 (209%)

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 3GB

Amazon.com

Check prices at:

Radeon HD 4870 2GB

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 580 3GB Radeon HD 4870 2GB
Manufacturer nVidia AMD
Year November 2010 Jun 25, 2008
Code Name GF110 RV770 XT
Memory 3072 MB 2048 MB
Core Speed 772 MHz 750 MHz
Memory Speed 4008 MHz 3600 MHz
Power (Max TDP) 244 watts 150 watts
Bandwidth 192384 MB/sec 115200 MB/sec
Texel Rate 49408 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 12000 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 956 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: Memory bandwidth is the max amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher 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 number of texture map elements (texels) that are processed in one second. This 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs 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 output rate is also dependant 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 maximum fill rate.

Display Prices

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GeForce GTX 580 3GB

Amazon.com

Check prices at:

Radeon HD 4870 2GB

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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