GeForce GT 130 vs Radeon HD 7850

Intro

Compare those specifications to the Radeon HD 7850, which comes with GPU core speed of 860 MHz, and 2048 MB of GDDR5 memory running at 1200 MHz through a 256-bit bus. It also is made up of 1024 Stream Processors, 64 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 130		75 Watts
Radeon HD 7850		130 Watts
	Difference: 55 Watts (73%)

Memory Bandwidth

The Radeon HD 7850, in theory, should perform a lot faster than the GeForce GT 130 in general. (explain)

Radeon HD 7850		153600 MB/sec
GeForce GT 130		12000 MB/sec
	Difference: 141600 (1180%)

Texel Rate

The Radeon HD 7850 is much (approximately 359%) better at anisotropic filtering than the GeForce GT 130. (explain)

Radeon HD 7850		55040 Mtexels/sec
GeForce GT 130		12000 Mtexels/sec
	Difference: 43040 (359%)

Pixel Rate

The Radeon HD 7850 is much (more or less 244%) more effective at anti-aliasing than the GeForce GT 130, and also should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 7850		27520 Mpixels/sec
GeForce GT 130		8000 Mpixels/sec
	Difference: 19520 (244%)

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 maximum amount of information (in units of MB per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units of the card 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 one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.