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GeForce GTX 580 vs Radeon HD 4850 512MB

Intro

The GeForce GTX 580 makes use of a 40 nm design. nVidia has set the core speed at 772 MHz. The GDDR5 RAM is set to run at a frequency of 1002 MHz on this particular card. It features 512 SPUs as well as 64 Texture Address Units and 48 Rasterization Operator Units.

Compare those specs to the Radeon HD 4850 512MB, which uses a 55 nm design. ATi has clocked the core frequency at 625 MHz. The GDDR3 memory runs at a speed of 993 MHz on this specific model. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

(No game benchmarks for this combination yet.)

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 should be 203% faster than the Radeon HD 4850 512MB overall, because of its higher 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 should be much (about 98%) faster with regards to 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 running with lots of anti-aliasing is important to you, then the GeForce GTX 580 is a better choice, 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

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

GeForce GTX 580

Amazon.com

Other US-based stores

Radeon HD 4850 512MB

Amazon.com

Other US-based stores

Specifications

Model GeForce GTX 580 Radeon HD 4850 512MB
Manufacturer nVidia ATi
Year November 2010 Jun 25, 2008
Code Name GF110 RV770 PRO
Fab Process 40 nm 55 nm
Bus PCIe x16 PCIe 2.0 x16
Memory 1536 MB 512 MB
Core Speed 772 MHz 625 MHz
Shader Speed 1544 MHz (N/A) MHz
Memory Speed 1002 MHz (4008 MHz effective) 993 MHz (1986 MHz effective)
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
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0
Power (Max TDP) 244 watts 110 watts
Shader Model 5.0 4.1
Bandwidth 192384 MB/sec 63552 MB/sec
Texel Rate 49408 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 10000 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it must 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at 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 can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill 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.

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