GeForce GT 440 1.5GB vs Geforce GTX 680

Intro

Compare all of that to the Geforce GTX 680, which comes with a GPU core clock speed of 1006 MHz, and 2048 MB of GDDR5 RAM running at 1502 MHz through a 256-bit bus. It also is comprised of 1536 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Geforce GTX 680		7650 points
GeForce GT 440 1.5GB		840 points
	Difference: 6810 (811%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		56 Watts
Geforce GTX 680		195 Watts
	Difference: 139 Watts (248%)

Memory Bandwidth

Performance-wise, the Geforce GTX 680 should theoretically be much better than the GeForce GT 440 1.5GB in general. (explain)

Geforce GTX 680		192256 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 149056 (345%)

Texel Rate

The Geforce GTX 680 will be much (more or less 803%) faster with regards to AF than the GeForce GT 440 1.5GB. (explain)

Geforce GTX 680		128768 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 114512 (803%)

Pixel Rate

The Geforce GTX 680 will be much (approximately 126%) faster with regards to FSAA than the GeForce GT 440 1.5GB, and able to handle higher screen resolutions without slowing down too much. (explain)

Geforce GTX 680		32192 Mpixels/sec
GeForce GT 440 1.5GB		14256 Mpixels/sec
	Difference: 17936 (126%)

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 max amount of data (measured in megabytes per second) that can be transferred over the external memory interface in a second. The number is calculated 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 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 number of texture map elements (texels) that are 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 higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.