GeForce GT 440 1.5GB vs Radeon HD 4750

Intro

Compare those specs to the Radeon HD 4750, which has a GPU core clock speed of 730 MHz, and 512 MB of GDDR5 memory set to run at 800 MHz through a 128-bit bus. It also is made up of 640(128x5) SPUs, 32 TAUs, 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 4750		75 Watts
	Difference: 19 Watts (34%)

Memory Bandwidth

The Radeon HD 4750 should in theory perform a little bit faster than the GeForce GT 440 1.5GB overall. (explain)

Radeon HD 4750		51200 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 8000 (19%)

Texel Rate

The Radeon HD 4750 should be quite a bit (more or less 64%) better at anisotropic filtering than the GeForce GT 440 1.5GB. (explain)

Radeon HD 4750		23360 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 9104 (64%)

Pixel Rate

The GeForce GT 440 1.5GB will be a lot (more or less 22%) faster with regards to FSAA than the Radeon HD 4750, and also will be able to handle higher screen resolutions more effectively. (explain)

GeForce GT 440 1.5GB		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: Bandwidth is the max amount of information (measured in MB per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, 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 amount of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better 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 one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. 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 ability to get to the max fill rate.