GeForce GT 130 vs Radeon HD 6790

Intro

Compare those specs to the Radeon HD 6790, which features GPU clock speed of 840 MHz, and 1024 MB of GDDR5 RAM set to run at 1050 MHz through a 256-bit bus. It also is made up of 800 Stream Processors, 40 Texture Address Units, and 16 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 6790		150 Watts
	Difference: 75 Watts (100%)

Memory Bandwidth

In theory, the Radeon HD 6790 should be 1020% faster than the GeForce GT 130 overall, because of its higher data rate. (explain)

Radeon HD 6790		134400 MB/sec
GeForce GT 130		12000 MB/sec
	Difference: 122400 (1020%)

Texel Rate

The Radeon HD 6790 should be quite a bit (more or less 180%) faster with regards to AF than the GeForce GT 130. (explain)

Radeon HD 6790		33600 Mtexels/sec
GeForce GT 130		12000 Mtexels/sec
	Difference: 21600 (180%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6790 is superior to the GeForce GT 130, and very much so. (explain)

Radeon HD 6790		13440 Mpixels/sec
GeForce GT 130		8000 Mpixels/sec
	Difference: 5440 (68%)

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 megabytes per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount 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 maximum amount 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 calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.