GeForce GTS 250 512MB vs Radeon HD 6770 1GB

Intro

Compare those specifications to the Radeon HD 6770 1GB, which has GPU clock speed of 900 MHz, and 1024 MB of GDDR5 RAM running at 1050 MHz through a 128-bit bus. It also features 800 SPUs, 40 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 6770 1GB		108 Watts
GeForce GTS 250 512MB		145 Watts
	Difference: 37 Watts (34%)

Memory Bandwidth

The GeForce GTS 250 512MB should theoretically perform just a bit faster than the Radeon HD 6770 1GB in general. (explain)

GeForce GTS 250 512MB		70400 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 3200 (5%)

Texel Rate

The GeForce GTS 250 512MB will be quite a bit (approximately 31%) better at anisotropic filtering than the Radeon HD 6770 1GB. (explain)

GeForce GTS 250 512MB		47232 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 11232 (31%)

Pixel Rate

The Radeon HD 6770 1GB should be quite a bit (approximately 22%) more effective at AA than the GeForce GTS 250 512MB, and able to handle higher resolutions more effectively. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce GTS 250 512MB		11808 Mpixels/sec
	Difference: 2592 (22%)

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 megabytes per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.