GeForce GT 130 vs Radeon HD 7990

Intro

Compare those specs to the Radeon HD 7990, which has a core clock speed of 950 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 384-bit bus, and makes use of a 28 nm design. It is made up of 2048 SPUs, 128 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 7990		375 Watts
	Difference: 300 Watts (400%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7990 should in theory be a lot superior to 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 will be quite a bit (more or less 1927%) more effective at AF 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 should be much (approximately 660%) more effective at anti-aliasing than the GeForce GT 130, and should 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 MB per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.