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GeForce 8800 GTS (G80) 320MB vs Radeon HD 4850 2GB

Intro

The GeForce 8800 GTS (G80) 320MB features a GPU clock speed of 513 MHz, and the 320 MB of GDDR3 RAM is set to run at 792 MHz through a 320-bit bus. It also features 96 Stream Processors, 48 TAUs, and 20 ROPs.

Compare those specs to the Radeon HD 4850 2GB, which has core clock speeds of 625 MHz on the GPU, and 993 MHz on the 2048 MB of GDDR4 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 2GB 110 Watts
GeForce 8800 GTS (G80) 320MB 143 Watts
Difference: 33 Watts (30%)

Memory Bandwidth

Performance-wise, the Radeon HD 4850 2GB should theoretically be a bit better than the GeForce 8800 GTS (G80) 320MB in general. (explain)

Radeon HD 4850 2GB 63552 MB/sec
GeForce 8800 GTS (G80) 320MB 63360 MB/sec
Difference: 192 (0%)

Texel Rate

The Radeon HD 4850 2GB is a small bit (approximately 2%) better at texture filtering than the GeForce 8800 GTS (G80) 320MB. (explain)

Radeon HD 4850 2GB 25000 Mtexels/sec
GeForce 8800 GTS (G80) 320MB 24624 Mtexels/sec
Difference: 376 (2%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce 8800 GTS (G80) 320MB is the winner, though not by far. (explain)

GeForce 8800 GTS (G80) 320MB 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) 320MB

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) 320MB Radeon HD 4850 2GB
Manufacturer nVidia AMD
Year Feb 2007 Jun 25, 2008
Code Name G80 RV770 PRO
Memory 320 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 largest amount of information (counted in MB per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the graphics 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 that the graphics chip could possibly record 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 core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8800 GTS (G80) 320MB

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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