GeForce GT 440 1.5GB vs Radeon HD 4870 1GB

Intro

Compare those specifications to the Radeon HD 4870 1GB, 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 Texture Address Units and 16 ROPs.

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 1GB		150 Watts
	Difference: 94 Watts (168%)

Memory Bandwidth

Performance-wise, the Radeon HD 4870 1GB should in theory be quite a bit superior to the GeForce GT 440 1.5GB in general. (explain)

Radeon HD 4870 1GB		115200 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 72000 (167%)

Texel Rate

The Radeon HD 4870 1GB is quite a bit (more or less 110%) better at AF than the GeForce GT 440 1.5GB. (explain)

Radeon HD 4870 1GB		30000 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 15744 (110%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GT 440 1.5GB is the winner, but it probably won't make a huge difference. (explain)

GeForce GT 440 1.5GB		14256 Mpixels/sec
Radeon HD 4870 1GB		12000 Mpixels/sec
	Difference: 2256 (19%)

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

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also 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 - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.