GeForce GTX 460 (OEM) vs Radeon HD 6850

Intro

Compare all that to the Radeon HD 6850, which features a clock speed of 775 MHz and a GDDR5 memory frequency of 1000 MHz. It also makes use of a 256-bit memory bus, and makes use of a 40 nm design. It is made up of 960 SPUs, 48 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850		127 Watts
GeForce GTX 460 (OEM)		150 Watts
	Difference: 23 Watts (18%)

Memory Bandwidth

Performance-wise, the Radeon HD 6850 should in theory be a little bit better than the GeForce GTX 460 (OEM) overall. (explain)

Radeon HD 6850		128000 MB/sec
GeForce GTX 460 (OEM)		108800 MB/sec
	Difference: 19200 (18%)

Texel Rate

The Radeon HD 6850 should be just a bit (approximately 2%) more effective at AF than the GeForce GTX 460 (OEM). (explain)

Radeon HD 6850		37200 Mtexels/sec
GeForce GTX 460 (OEM)		36400 Mtexels/sec
	Difference: 800 (2%)

Pixel Rate

The Radeon HD 6850 should be just a bit (approximately 19%) better at FSAA than the GeForce GTX 460 (OEM), and also should be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 6850		24800 Mpixels/sec
GeForce GTX 460 (OEM)		20800 Mpixels/sec
	Difference: 4000 (19%)

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 maximum amount of information (counted in MB per second) that can be transferred over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

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