GeForce GT 430 1GB vs Radeon HD 7990

Intro

Compare all that to the Radeon HD 7990, which comes with a GPU core clock speed of 950 MHz, and 3072 MB of GDDR5 memory running at 1500 MHz through a 384-bit bus. It also is made up of 2048 Stream Processors, 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 430 1GB		60 Watts
Radeon HD 7990		375 Watts
	Difference: 315 Watts (525%)

Memory Bandwidth

Theoretically, the Radeon HD 7990 should be quite a bit faster than the GeForce GT 430 1GB overall. (explain)

Radeon HD 7990		576000 MB/sec
GeForce GT 430 1GB		28800 MB/sec
	Difference: 547200 (1900%)

Texel Rate

The Radeon HD 7990 is much (more or less 2071%) better at texture filtering than the GeForce GT 430 1GB. (explain)

Radeon HD 7990		243200 Mtexels/sec
GeForce GT 430 1GB		11200 Mtexels/sec
	Difference: 232000 (2071%)

Pixel Rate

The Radeon HD 7990 will be a lot (more or less 2071%) better at FSAA than the GeForce GT 430 1GB, and should be able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 7990		60800 Mpixels/sec
GeForce GT 430 1GB		2800 Mpixels/sec
	Difference: 58000 (2071%)

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 max amount of information (measured in megabytes per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the 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 texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total number of texture units 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core 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 rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.