GeForce GT 130 vs Radeon HD 7990

Intro

Compare those specifications to the Radeon HD 7990, which uses a 28 nm design. AMD has set the core speed at 950 MHz. The GDDR5 memory runs at a frequency of 1500 MHz on this card. It features 2048 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 130		75 Watts
Radeon HD 7990		375 Watts
	Difference: 300 Watts (400%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7990 should perform quite a bit faster than the GeForce GT 130 in general. (explain)

Radeon HD 7990		576000 MB/sec
GeForce GT 130		12000 MB/sec
	Difference: 564000 (4700%)

Texel Rate

The Radeon HD 7990 should be quite a bit (more or less 1927%) faster with regards to anisotropic filtering than the GeForce GT 130. (explain)

Radeon HD 7990		243200 Mtexels/sec
GeForce GT 130		12000 Mtexels/sec
	Difference: 231200 (1927%)

Pixel Rate

The Radeon HD 7990 will be quite a bit (more or less 660%) more effective at AA than the GeForce GT 130, and will be capable of handling higher resolutions better. (explain)

Radeon HD 7990		60800 Mpixels/sec
GeForce GT 130		8000 Mpixels/sec
	Difference: 52800 (660%)

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: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred past the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR 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 texture units 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 in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.