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GeForce 8800 GTS (G80) 320MB vs Radeon HD 4550 256MB

Intro

The GeForce 8800 GTS (G80) 320MB has a GPU core 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 is comprised of 96 SPUs, 48 Texture Address Units, and 20 Raster Operation Units.

Compare all that to the Radeon HD 4550 256MB, which features a clock frequency of 600 MHz and a DDR3 memory speed of 800 MHz. It also makes use of a 64-bit bus, and uses a 55 nm design. It is comprised of 80(16x5) SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 256MB 25 Watts
GeForce 8800 GTS (G80) 320MB 143 Watts
Difference: 118 Watts (472%)

Memory Bandwidth

Theoretically speaking, the GeForce 8800 GTS (G80) 320MB will be 395% faster than the Radeon HD 4550 256MB overall, because of its greater data rate. (explain)

GeForce 8800 GTS (G80) 320MB 63360 MB/sec
Radeon HD 4550 256MB 12800 MB/sec
Difference: 50560 (395%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB should be quite a bit (approximately 413%) more effective at AF than the Radeon HD 4550 256MB. (explain)

GeForce 8800 GTS (G80) 320MB 24624 Mtexels/sec
Radeon HD 4550 256MB 4800 Mtexels/sec
Difference: 19824 (413%)

Pixel Rate

The GeForce 8800 GTS (G80) 320MB will be a lot (about 328%) faster with regards to FSAA than the Radeon HD 4550 256MB, and capable of handling higher resolutions more effectively. (explain)

GeForce 8800 GTS (G80) 320MB 10260 Mpixels/sec
Radeon HD 4550 256MB 2400 Mpixels/sec
Difference: 7860 (328%)

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

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Radeon HD 4550 256MB

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 GTS (G80) 320MB Radeon HD 4550 256MB
Manufacturer nVidia AMD
Year Feb 2007 Sep 30, 2008
Code Name G80 RV710
Memory 320 MB 256 MB
Core Speed 513 MHz 600 MHz
Memory Speed 1584 MHz 1600 MHz
Power (Max TDP) 143 watts 25 watts
Bandwidth 63360 MB/sec 12800 MB/sec
Texel Rate 24624 Mtexels/sec 4800 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 2400 Mpixels/sec
Unified Shaders 96 80(16x5)
Texture Mapping Units 48 8
Render Output Units 20 4
Bus Type GDDR3 DDR3
Bus Width 320-bit 64-bit
Fab Process 90 nm 55 nm
Transistors 681 million 242 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: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 processed in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce 8800 GTS (G80) 320MB

Amazon.com

Check prices at:

Radeon HD 4550 256MB

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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