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GeForce GTX 580 vs Radeon HD 7850


Intro

The GeForce GTX 580 features clock speeds of 772 MHz on the GPU, and 1002 MHz on the 1536 MB of GDDR5 RAM. It features 512 SPUs as well as 64 Texture Address Units and 48 Rasterization Operator Units.

Compare all of that to the Radeon HD 7850, which comes with clock speeds of 860 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 RAM. It features 1024 SPUs as well as 64 Texture Address Units and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7850 5200 points
GeForce GTX 580 4960 points
Difference: 240 (5%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
GeForce GTX 580 244 Watts
Difference: 114 Watts (88%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 580 is 25% faster than the Radeon HD 7850 in general, due to its higher data rate. (explain)

GeForce GTX 580 192384 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 38784 (25%)

Texel Rate

The Radeon HD 7850 is a bit (about 11%) faster with regards to AF than the GeForce GTX 580. (explain)

Radeon HD 7850 55040 Mtexels/sec
GeForce GTX 580 49408 Mtexels/sec
Difference: 5632 (11%)

Pixel Rate

The GeForce GTX 580 will be much (about 35%) more effective at AA than the Radeon HD 7850, and capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 580 37056 Mpixels/sec
Radeon HD 7850 27520 Mpixels/sec
Difference: 9536 (35%)

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

GeForce GTX 580

Radeon HD 7850

Specifications

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Model GeForce GTX 580 Radeon HD 7850
Manufacturer nVidia AMD
Year November 2010 March 2012
Code Name GF110 Pitcairn Pro
Memory 1536 MB 2048 MB
Core Speed 772 MHz 860 MHz
Memory Speed 4008 MHz 4800 MHz
Power (Max TDP) 244 watts 130 watts
Bandwidth 192384 MB/sec 153600 MB/sec
Texel Rate 49408 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 37056 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 512 1024
Texture Mapping Units 64 64
Render Output Units 48 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 40 nm 28 nm
Transistors 3000 million 2800 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.2

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's 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 can be processed per second. This figure is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called 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 of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

GeForce GTX 580

Radeon HD 7850

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