lunedì 5 dicembre 2011

AMD Radeon HD 6950 2 GB vs Nvidia GTX 570


Intro

The GeForce GTX 570 has a core clock frequency of 732 MHz and a GDDR5 memory frequency of 950 MHz. It also uses a 320-bit memory bus, and makes use of a 40 nm design. It features 480 SPUs, 60 TAUs, and 40 Raster Operation Units.
Compare those specs to the Radeon HD 6950 2GB, which uses a 40 nm design. ATi has set the core speed at 800 MHz. The GDDR5 memory is set to run at a speed of 1250 MHz on this card. It features 1408 SPUs as well as 88 TAUs and 32 ROPs.

Battlefield Bad Company 2

Settings:Highest Settings
AA:4x
AF:16x
Resolution:1920x1200
Test Machine:Intel Core i7 920(ES) @ 4.0Ghz (Turbo Mode Enabled) (Source)
GeForce GTX 57059 FPS
Radeon HD 6950 2GB51 FPS
Difference: 8 FPS (16%)

DiRT 2

Settings:Highest Details
AA:4x
AF:none
Resolution:1920x1200
Test Machine:Intel Core i7 920(ES) @ 4.0Ghz (Turbo Mode Enabled) (Source)
GeForce GTX 57095 FPS
Radeon HD 6950 2GB72 FPS
Difference: 23 FPS (32%)

Just Cause 2

Settings:Highest Settings
AA:4x
AF:16x
Resolution:1920x1200
Test Machine:Intel Core i7 920(ES) @ 4.0Ghz (Turbo Mode Enabled) (Source)
GeForce GTX 57059 FPS
Radeon HD 6950 2GB54 FPS
Difference: 5 FPS (9%)

GeForce GTX 570 is Fastest

When combining all game benchmark scores together, the GeForce GTX 570 wins overall, by 36 FPS.
GeForce GTX 570213 FPS
Radeon HD 6950 2GB177 FPS
Difference: 36 FPS (20%)

Power, Temperatures and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6950 2GB200 Watts
GeForce GTX 570219 Watts
Difference: 19 Watts (10%)

Memory Bandwidth

In theory, the Radeon HD 6950 2GB should perform a small bit faster than the GeForce GTX 570 in general. (explain)
Radeon HD 6950 2GB160000 MB/sec
GeForce GTX 570152000 MB/sec
Difference: 8000 (5%)

Texel Rate

The Radeon HD 6950 2GB will be quite a bit (about 60%) better at anisotropic filtering than the GeForce GTX 570. (explain)
Radeon HD 6950 2GB70400 Mtexels/sec
GeForce GTX 57043920 Mtexels/sec
Difference: 26480 (60%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 570 is superior to the Radeon HD 6950 2GB, though only just barely. (explain)
GeForce GTX 57029280 Mpixels/sec
Radeon HD 6950 2GB25600 Mpixels/sec
Difference: 3680 (14%)
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.

GeForce GTX 570

Amazon.com

Other US-based stores

Amazon.co.uk

Amazon.de

Amazon.fr

Radeon HD 6950 2GB

Amazon.com

Other US-based stores

Amazon.co.uk

Amazon.de

Amazon.fr

Specifications

ModelGeForce GTX 570Radeon HD 6950 2GB
ManufacturernVidiaATi
YearDecember 2010December 2010
Code NameGF110Cayman Pro
Fab Process40 nm40 nm
BusPCIe x16PCIe x16
Memory1280 MB2048 MB
Core Speed732 MHz800 MHz
Shader Speed1464 MHz(N/A) MHz
Memory Speed950 MHz1250 MHz
Unified Shaders4801408
Texture Mapping Units6088
Render Output Units4032
Bus TypeGDDR5GDDR5
Bus Width320-bit256-bit
DirectX VersionDirectX 11DirectX 11
OpenGL VersionOpenGL 4.1OpenGL 4.1
Power (Max TDP)219 watts200 watts
Shader Model5.05.0
Bandwidth152000 MB/sec160000 MB/sec
Texel Rate43920 Mtexels/sec70400 Mtexels/sec
Pixel Rate29280 Mpixels/sec25600 Mpixels/sec
Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen 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 texture units by the core clock speed of the chip. The better 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 in a second.
Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

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