GeForce GTS 150 vs Radeon HD 6850

Intro

Compare all that to the Radeon HD 6850, which features a GPU core clock speed of 775 MHz, and 1024 MB of GDDR5 memory set to run at 1000 MHz through a 256-bit bus. It also is made up of 960 SPUs, 48 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850		127 Watts
GeForce GTS 150		141 Watts
	Difference: 14 Watts (11%)

Memory Bandwidth

The Radeon HD 6850 should in theory be a lot faster than the GeForce GTS 150 in general. (explain)

Radeon HD 6850		128000 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 96000 (300%)

Texel Rate

The GeForce GTS 150 should be a lot (approximately 27%) better at AF than the Radeon HD 6850. (explain)

GeForce GTS 150		47360 Mtexels/sec
Radeon HD 6850		37200 Mtexels/sec
	Difference: 10160 (27%)

Pixel Rate

The Radeon HD 6850 will be much (more or less 109%) faster with regards to FSAA than the GeForce GTS 150, and will be capable of handling higher screen resolutions better. (explain)

Radeon HD 6850		24800 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 12960 (109%)

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 max amount of information (in units of megabytes per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling 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 chip could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. 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 ability to get to the maximum fill rate.