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GeForce 8800 GTS (G80) 640MB vs Radeon HD 4850 2GB

Intro

The GeForce 8800 GTS (G80) 640MB has a core clock speed of 513 MHz and a GDDR3 memory speed of 792 MHz. It also features a 320-bit bus, and makes use of a 90 nm design. It is comprised of 96 SPUs, 48 Texture Address Units, and 20 Raster Operation Units.

Compare all of that to the Radeon HD 4850 2GB, which has a clock speed of 625 MHz and a GDDR4 memory frequency of 993 MHz. It also features a 256-bit bus, and makes use of a 55 nm design. It features 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 2GB 110 Watts
GeForce 8800 GTS (G80) 640MB 143 Watts
Difference: 33 Watts (30%)

Memory Bandwidth

Theoretically, the Radeon HD 4850 2GB should be a small bit faster than the GeForce 8800 GTS (G80) 640MB overall. (explain)

Radeon HD 4850 2GB 63552 MB/sec
GeForce 8800 GTS (G80) 640MB 63360 MB/sec
Difference: 192 (0%)

Texel Rate

The Radeon HD 4850 2GB should be a bit (more or less 2%) more effective at AF than the GeForce 8800 GTS (G80) 640MB. (explain)

Radeon HD 4850 2GB 25000 Mtexels/sec
GeForce 8800 GTS (G80) 640MB 24624 Mtexels/sec
Difference: 376 (2%)

Pixel Rate

The GeForce 8800 GTS (G80) 640MB is a little bit (approximately 3%) more effective at anti-aliasing than the Radeon HD 4850 2GB, and able to handle higher screen resolutions more effectively. (explain)

GeForce 8800 GTS (G80) 640MB 10260 Mpixels/sec
Radeon HD 4850 2GB 10000 Mpixels/sec
Difference: 260 (3%)

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 GTS (G80) 640MB

Amazon.com

Check prices at:

Radeon HD 4850 2GB

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 GTS (G80) 640MB Radeon HD 4850 2GB
Manufacturer nVidia AMD
Year Nov 2006 (640) Jun 25, 2008
Code Name G80 RV770 PRO
Memory 640 MB 2048 MB
Core Speed 513 MHz 625 MHz
Memory Speed 1584 MHz 1986 MHz
Power (Max TDP) 143 watts 110 watts
Bandwidth 63360 MB/sec 63552 MB/sec
Texel Rate 24624 Mtexels/sec 25000 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 10000 Mpixels/sec
Unified Shaders 96 800(160x5)
Texture Mapping Units 48 40
Render Output Units 20 16
Bus Type GDDR3 GDDR4
Bus Width 320-bit 256-bit
Fab Process 90 nm 55 nm
Transistors 681 million 956 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 number of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka 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 bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8800 GTS (G80) 640MB

Amazon.com

Check prices at:

Radeon HD 4850 2GB

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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