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GeForce 8800 GT 512MB vs Radeon HD 4850 512MB

Intro

The GeForce 8800 GT 512MB comes with a GPU core clock speed of 600 MHz, and the 512 MB of GDDR3 RAM is set to run at 900 MHz through a 256-bit bus. It also is comprised of 112 SPUs, 56 TAUs, and 16 ROPs.

Compare that to the Radeon HD 4850 512MB, which comes with core clock speeds of 625 MHz on the GPU, and 993 MHz on the 512 MB of GDDR3 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GT 512MB 105 Watts
Radeon HD 4850 512MB 110 Watts
Difference: 5 Watts (5%)

Memory Bandwidth

As far as performance goes, the Radeon HD 4850 512MB should theoretically be a bit better than the GeForce 8800 GT 512MB overall. (explain)

Radeon HD 4850 512MB 63552 MB/sec
GeForce 8800 GT 512MB 57600 MB/sec
Difference: 5952 (10%)

Texel Rate

The GeForce 8800 GT 512MB will be much (approximately 34%) more effective at anisotropic filtering than the Radeon HD 4850 512MB. (explain)

GeForce 8800 GT 512MB 33600 Mtexels/sec
Radeon HD 4850 512MB 25000 Mtexels/sec
Difference: 8600 (34%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 4850 512MB is a better choice, but only just. (explain)

Radeon HD 4850 512MB 10000 Mpixels/sec
GeForce 8800 GT 512MB 9600 Mpixels/sec
Difference: 400 (4%)

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

Check prices at:

Radeon HD 4850 512MB

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 4850 512MB
Manufacturer nVidia AMD
Year Oct 2007 Jun 25, 2008
Code Name G92 RV770 PRO
Memory 512 MB 512 MB
Core Speed 600 MHz 625 MHz
Memory Speed 1800 MHz 1986 MHz
Power (Max TDP) 105 watts 110 watts
Bandwidth 57600 MB/sec 63552 MB/sec
Texel Rate 33600 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 112 800(160x5)
Texture Mapping Units 56 40
Render Output Units 16 16
Bus Type GDDR3 GDDR3
Bus Width 256-bit 256-bit
Fab Process 65 nm 55 nm
Transistors 754 million 956 million
Bus PCIe x16 2.0 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of data (counted in MB per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units by the core clock 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

GeForce 8800 GT 512MB

Amazon.com

Check prices at:

Radeon HD 4850 512MB

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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