GeForce GTX 260 vs Radeon HD 6770

Intro

Compare those specs to the Radeon HD 6770, which uses a 40 nm design. AMD has set the core speed at 900 MHz. The GDDR5 RAM works at a speed of 1050 MHz on this model. It features 800 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6770		108 Watts
GeForce GTX 260		182 Watts
	Difference: 74 Watts (69%)

Memory Bandwidth

Performance-wise, the GeForce GTX 260 should in theory be a lot superior to the Radeon HD 6770 in general. (explain)

GeForce GTX 260		111888 MB/sec
Radeon HD 6770		67200 MB/sec
	Difference: 44688 (67%)

Texel Rate

The GeForce GTX 260 should be a bit (more or less 2%) faster with regards to texture filtering than the Radeon HD 6770. (explain)

GeForce GTX 260		36864 Mtexels/sec
Radeon HD 6770		36000 Mtexels/sec
	Difference: 864 (2%)

Pixel Rate

The GeForce GTX 260 should be just a bit (approximately 12%) better at AA than the Radeon HD 6770, and will be capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 260		16128 Mpixels/sec
Radeon HD 6770		14400 Mpixels/sec
	Difference: 1728 (12%)

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 transported past the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster 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 figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.