GeForce GT 440 1.5GB vs Radeon HD 4870 X2

Intro

Compare those specifications to the Radeon HD 4870 X2, which features clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		56 Watts
Radeon HD 4870 X2		350 Watts
	Difference: 294 Watts (525%)

Memory Bandwidth

The Radeon HD 4870 X2, in theory, should perform quite a bit faster than the GeForce GT 440 1.5GB overall. (explain)

Radeon HD 4870 X2		230400 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 187200 (433%)

Texel Rate

The Radeon HD 4870 X2 is quite a bit (about 321%) faster with regards to anisotropic filtering than the GeForce GT 440 1.5GB. (explain)

Radeon HD 4870 X2		60000 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 45744 (321%)

Pixel Rate

The Radeon HD 4870 X2 should be quite a bit (approximately 68%) better at AA than the GeForce GT 440 1.5GB, and able to handle higher resolutions more effectively. (explain)

Radeon HD 4870 X2		24000 Mpixels/sec
GeForce GT 440 1.5GB		14256 Mpixels/sec
	Difference: 9744 (68%)

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 maximum amount of data (measured in megabytes per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.