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GeForce 8800 GT 512MB vs Radeon HD 7950

Intro

The GeForce 8800 GT 512MB uses a 65 nm design. nVidia has clocked the core frequency at 600 MHz. The GDDR3 memory runs at a frequency of 900 MHz on this model. It features 112 SPUs along with 56 Texture Address Units and 16 ROPs.

Compare all that to the Radeon HD 7950, which features core clock speeds of 800 MHz on the GPU, and 1250 MHz on the 1536 MB of GDDR5 memory. It features 1792 SPUs as well as 112 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB 105 Watts
Radeon HD 7950 200 Watts
Difference: 95 Watts (90%)

Memory Bandwidth

In theory, the Radeon HD 7950 will be 317% quicker than the GeForce 8800 GT 512MB in general, because of its higher bandwidth. (explain)

Radeon HD 7950 240000 MB/sec
GeForce 8800 GT 512MB 57600 MB/sec
Difference: 182400 (317%)

Texel Rate

The Radeon HD 7950 is a lot (about 167%) better at anisotropic filtering than the GeForce 8800 GT 512MB. (explain)

Radeon HD 7950 89600 Mtexels/sec
GeForce 8800 GT 512MB 33600 Mtexels/sec
Difference: 56000 (167%)

Pixel Rate

The Radeon HD 7950 should be quite a bit (more or less 167%) faster with regards to full screen anti-aliasing than the GeForce 8800 GT 512MB, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 7950 25600 Mpixels/sec
GeForce 8800 GT 512MB 9600 Mpixels/sec
Difference: 16000 (167%)

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 8800 GT 512MB

Amazon.com

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Radeon HD 7950

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 8800 GT 512MB Radeon HD 7950
Manufacturer nVidia AMD
Year Oct 2007 January 2012
Code Name G92 Tahiti Pro
Memory 512 MB 1536 MB
Core Speed 600 MHz 800 MHz
Memory Speed 1800 MHz 5000 MHz
Power (Max TDP) 105 watts 200 watts
Bandwidth 57600 MB/sec 240000 MB/sec
Texel Rate 33600 Mtexels/sec 89600 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 112 1792
Texture Mapping Units 56 112
Render Output Units 16 32
Bus Type GDDR3 GDDR5
Bus Width 256-bit 384-bit
Fab Process 65 nm 28 nm
Transistors 754 million 4313 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the bus width by its memory speed. In the case of 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 AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the 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 that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce 8800 GT 512MB

Amazon.com

Check prices at:

Radeon HD 7950

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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