GeForce GT 130 vs Radeon HD 6990

Intro

Compare all that to the Radeon HD 6990, which has a clock speed of 830 MHz and a GDDR5 memory speed of 1250 MHz. It also makes use of a 256-bit memory bus, and makes use of a 40 nm design. It features 1536 SPUs, 96 Texture Address Units, 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

In theory, the Radeon HD 6990 will be 2567% faster than the GeForce GT 130 in general, because of its greater bandwidth. (explain)

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

Texel Rate

The Radeon HD 6990 is much (more or less 1228%) more effective 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 running with a high screen resolution is important to you, then the Radeon HD 6990 is superior to the GeForce GT 130, 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 (in units of megabytes per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units of the card by the core 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 video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.