GeForce GTS 250 1GB vs Radeon HD 6750 1GB

Intro

Compare all that to the Radeon HD 6750 1GB, which comes with a GPU core clock speed of 725 MHz, and 1024 MB of GDDR5 RAM set to run at 1000 MHz through a 128-bit bus. It also features 720 Stream Processors, 36 TAUs, 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 GTS 250 1GB		145 Watts
	Difference: 59 Watts (69%)

Memory Bandwidth

The GeForce GTS 250 1GB, in theory, should be a small bit faster than the Radeon HD 6750 1GB overall. (explain)

GeForce GTS 250 1GB		70400 MB/sec
Radeon HD 6750 1GB		64000 MB/sec
	Difference: 6400 (10%)

Texel Rate

The GeForce GTS 250 1GB is much (about 81%) better at texture filtering than the Radeon HD 6750 1GB. (explain)

GeForce GTS 250 1GB		47232 Mtexels/sec
Radeon HD 6750 1GB		26100 Mtexels/sec
	Difference: 21132 (81%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTS 250 1GB is superior to the Radeon HD 6750 1GB, though only just barely. (explain)

GeForce GTS 250 1GB		11808 Mpixels/sec
Radeon HD 6750 1GB		11600 Mpixels/sec
	Difference: 208 (2%)

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 max amount of information (in units of MB per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number 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 higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.