GeForce 8800 GTX vs Radeon HD 4670 1GB

Intro

Compare all that to the Radeon HD 4670 1GB, which comes with GPU core speed of 750 MHz, and 1024 MB of GDDR4/GDDR3/DDR3/DDR2 memory running at 1100 MHz through a 128-bit bus. It also features 320(64x5) SPUs, 32 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4670 1GB		70 Watts
GeForce 8800 GTX		155 Watts
	Difference: 85 Watts (121%)

Memory Bandwidth

The GeForce 8800 GTX should in theory be a lot faster than the Radeon HD 4670 1GB in general. (explain)

GeForce 8800 GTX		86400 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 51200 (145%)

Texel Rate

The GeForce 8800 GTX should be a lot (about 53%) more effective at AF than the Radeon HD 4670 1GB. (explain)

GeForce 8800 GTX		36800 Mtexels/sec
Radeon HD 4670 1GB		24000 Mtexels/sec
	Difference: 12800 (53%)

Pixel Rate

The GeForce 8800 GTX is quite a bit (approximately 130%) faster with regards to AA than the Radeon HD 4670 1GB, and should be able to handle higher resolutions more effectively. (explain)

GeForce 8800 GTX		13800 Mpixels/sec
Radeon HD 4670 1GB		6000 Mpixels/sec
	Difference: 7800 (130%)

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

Specifications

Memory Bandwidth: Bandwidth is the largest amount of information (measured in megabytes per second) that can be transported past the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.