GeForce GT 440 3GB vs Radeon HD 4750

Intro

Compare those specifications to the Radeon HD 4750, which comes with clock speeds of 730 MHz on the GPU, and 800 MHz on the 512 MB of GDDR5 RAM. It features 640(128x5) SPUs as well as 32 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 3GB		56 Watts
Radeon HD 4750		75 Watts
	Difference: 19 Watts (34%)

Memory Bandwidth

Theoretically, the Radeon HD 4750 should perform a little bit faster than the GeForce GT 440 3GB overall. (explain)

Radeon HD 4750		51200 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 8000 (19%)

Texel Rate

The Radeon HD 4750 will be much (approximately 64%) better at anisotropic filtering than the GeForce GT 440 3GB. (explain)

Radeon HD 4750		23360 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 9104 (64%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GT 440 3GB is the winner, by a large margin. (explain)

GeForce GT 440 3GB		14256 Mpixels/sec
Radeon HD 4750		11680 Mpixels/sec
	Difference: 2576 (22%)

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: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units 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 in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour 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 quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.