GeForce GT 130 vs Radeon HD 6990

Intro

Compare that to the Radeon HD 6990, which features GPU core speed of 830 MHz, and 2048 MB of GDDR5 memory set to run at 1250 MHz through a 256-bit bus. It also is comprised of 1536 Stream Processors, 96 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 130		75 Watts
Radeon HD 6990		375 Watts
	Difference: 300 Watts (400%)

Memory Bandwidth

Theoretically, the Radeon HD 6990 should perform much faster than the GeForce GT 130 overall. (explain)

Radeon HD 6990		320000 MB/sec
GeForce GT 130		12000 MB/sec
	Difference: 308000 (2567%)

Texel Rate

The Radeon HD 6990 is quite a bit (approximately 1228%) better at anisotropic filtering than the GeForce GT 130. (explain)

Radeon HD 6990		159360 Mtexels/sec
GeForce GT 130		12000 Mtexels/sec
	Difference: 147360 (1228%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 6990 is a better choice, by far. (explain)

Radeon HD 6990		53120 Mpixels/sec
GeForce GT 130		8000 Mpixels/sec
	Difference: 45120 (564%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the maximum amount of data (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 bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also 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, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.