GeForce GT 440 1.5GB vs Radeon HD 4890 2GB

Intro

Compare those specifications to the Radeon HD 4890 2GB, which has GPU core speed of 1000 MHz, and 2048 MB of GDDR5 RAM set to run at 975 MHz through a 256-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		56 Watts
Radeon HD 4890 2GB		190 Watts
	Difference: 134 Watts (239%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4890 2GB should be much faster than the GeForce GT 440 1.5GB overall. (explain)

Radeon HD 4890 2GB		124800 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 81600 (189%)

Texel Rate

The Radeon HD 4890 2GB should be much (approximately 181%) better at AF than the GeForce GT 440 1.5GB. (explain)

Radeon HD 4890 2GB		40000 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 25744 (181%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 4890 2GB is the winner, not by a very large margin though. (explain)

Radeon HD 4890 2GB		16000 Mpixels/sec
GeForce GT 440 1.5GB		14256 Mpixels/sec
	Difference: 1744 (12%)

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.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 amount of texture map elements (texels) that can be 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 handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also 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 - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.