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GeForce 8800 GT 512MB vs Radeon HD 7850

Intro

The GeForce 8800 GT 512MB has a clock frequency of 600 MHz and a GDDR3 memory frequency of 900 MHz. It also makes use of a 256-bit bus, and uses a 65 nm design. It is comprised of 112 SPUs, 56 Texture Address Units, and 16 ROPs.

Compare those specifications to the Radeon HD 7850, which makes use of a 28 nm design. AMD has set the core frequency at 860 MHz. The GDDR5 RAM is set to run at a frequency of 1200 MHz on this specific model. It features 1024 SPUs along with 64 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 7850 130 Watts
Difference: 25 Watts (24%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7850 should theoretically be quite a bit superior to the GeForce 8800 GT 512MB overall. (explain)

Radeon HD 7850 153600 MB/sec
GeForce 8800 GT 512MB 57600 MB/sec
Difference: 96000 (167%)

Texel Rate

The Radeon HD 7850 is quite a bit (more or less 64%) better at texture filtering than the GeForce 8800 GT 512MB. (explain)

Radeon HD 7850 55040 Mtexels/sec
GeForce 8800 GT 512MB 33600 Mtexels/sec
Difference: 21440 (64%)

Pixel Rate

The Radeon HD 7850 should be a lot (more or less 187%) better at anti-aliasing than the GeForce 8800 GT 512MB, and also should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 7850 27520 Mpixels/sec
GeForce 8800 GT 512MB 9600 Mpixels/sec
Difference: 17920 (187%)

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 7850

Amazon.com

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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 7850
Manufacturer nVidia AMD
Year Oct 2007 March 2012
Code Name G92 Pitcairn Pro
Memory 512 MB 2048 MB
Core Speed 600 MHz 860 MHz
Memory Speed 1800 MHz 4800 MHz
Power (Max TDP) 105 watts 130 watts
Bandwidth 57600 MB/sec 153600 MB/sec
Texel Rate 33600 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 112 1024
Texture Mapping Units 56 64
Render Output Units 16 32
Bus Type GDDR3 GDDR5
Bus Width 256-bit 256-bit
Fab Process 65 nm 28 nm
Transistors 754 million 2800 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 largest amount of data (in units of MB per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce 8800 GT 512MB

Amazon.com

Check prices at:

Radeon HD 7850

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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