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GeForce GTX 580 vs Radeon HD 4850 512MB

Intro

The GeForce GTX 580 features a GPU clock speed of 772 MHz, and the 1536 MB of GDDR5 RAM runs at 1002 MHz through a 384-bit bus. It also is made up of 512 Stream Processors, 64 Texture Address Units, and 48 ROPs.

Compare all that to the Radeon HD 4850 512MB, which has core speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 RAM. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 512MB 110 Watts
GeForce GTX 580 244 Watts
Difference: 134 Watts (122%)

Memory Bandwidth

In theory, the GeForce GTX 580 will be 203% quicker than the Radeon HD 4850 512MB in general, due to its greater data rate. (explain)

GeForce GTX 580 192384 MB/sec
Radeon HD 4850 512MB 63552 MB/sec
Difference: 128832 (203%)

Texel Rate

The GeForce GTX 580 is much (about 98%) more effective at AF than the Radeon HD 4850 512MB. (explain)

GeForce GTX 580 49408 Mtexels/sec
Radeon HD 4850 512MB 25000 Mtexels/sec
Difference: 24408 (98%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 580 is superior to the Radeon HD 4850 512MB, by a large margin. (explain)

GeForce GTX 580 37056 Mpixels/sec
Radeon HD 4850 512MB 10000 Mpixels/sec
Difference: 27056 (271%)

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

Radeon HD 4850 512MB

Amazon.com

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 4850 512MB
Manufacturer nVidia AMD
Year November 2010 Jun 25, 2008
Code Name GF110 RV770 PRO
Memory 1536 MB 512 MB
Core Speed 772 MHz 625 MHz
Memory Speed 4008 MHz 1986 MHz
Power (Max TDP) 244 watts 110 watts
Bandwidth 192384 MB/sec 63552 MB/sec
Texel Rate 49408 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 512 800(160x5)
Texture Mapping Units 64 40
Render Output Units 48 16
Bus Type GDDR5 GDDR3
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: Bandwidth is the largest amount of information (in units of MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, 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 AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock 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 rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

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