GeForce GT 440 1.5GB vs Radeon HD 4870 X2

Intro

Compare that to the Radeon HD 4870 X2, which uses a 55 nm design. AMD has clocked the core speed at 750 MHz. The GDDR5 memory works at a frequency of 900 MHz on this card. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

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

In theory, the Radeon HD 4870 X2 will be 433% quicker than the GeForce GT 440 1.5GB in general, due to its greater data rate. (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 should be much (approximately 321%) better at 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

If using high levels of AA is important to you, then the Radeon HD 4870 X2 is superior to the GeForce GT 440 1.5GB, by a large margin. (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: Bandwidth is the max amount of data (measured in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's 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 amount of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

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