GeForce GT 440 3GB vs Radeon HD 7750

Intro

Compare those specs to the Radeon HD 7750, which makes use of a 28 nm design. AMD has set the core speed at 800 MHz. The GDDR5 memory works at a frequency of 1125 MHz on this particular model. It features 512 SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
GeForce GT 440 3GB		56 Watts
	Difference: 1 Watts (2%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7750 should be 67% quicker than the GeForce GT 440 3GB overall, because of its higher data rate. (explain)

Radeon HD 7750		72000 MB/sec
GeForce GT 440 3GB		43200 MB/sec
	Difference: 28800 (67%)

Texel Rate

The Radeon HD 7750 will be much (approximately 80%) better at anisotropic filtering than the GeForce GT 440 3GB. (explain)

Radeon HD 7750		25600 Mtexels/sec
GeForce GT 440 3GB		14256 Mtexels/sec
	Difference: 11344 (80%)

Pixel Rate

The GeForce GT 440 3GB should be a little bit (about 11%) better at FSAA than the Radeon HD 7750, and capable of handling higher resolutions while still performing well. (explain)

GeForce GT 440 3GB		14256 Mpixels/sec
Radeon HD 7750		12800 Mpixels/sec
	Difference: 1456 (11%)

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 largest amount of data (in units of megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units 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 fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.