GeForce GTX 480 vs Radeon HD 6750 1GB

Intro

Compare those specifications to the Radeon HD 6750 1GB, which comes with a clock frequency of 725 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit bus, and makes use of a 40 nm design. It is comprised of 720 SPUs, 36 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 1GB		86 Watts
GeForce GTX 480		250 Watts
	Difference: 164 Watts (191%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 480 should perform quite a bit faster than the Radeon HD 6750 1GB in general. (explain)

GeForce GTX 480		177408 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 113408 (177%)

Texel Rate

The GeForce GTX 480 is quite a bit (more or less 61%) more effective at AF than the Radeon HD 6750 1GB. (explain)

GeForce GTX 480		42000 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 15900 (61%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 480 is the winner, by a large margin. (explain)

GeForce GTX 480		33600 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 22000 (190%)

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

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.