GeForce GT 240 GDDR5 vs Geforce GTX 780

Intro

Compare all that to the Geforce GTX 780, which comes with GPU clock speed of 863 MHz, and 3072 MB of GDDR5 memory running at 1502 MHz through a 384-bit bus. It also is comprised of 2304 Stream Processors, 192 Texture Address Units, and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
Geforce GTX 780		250 Watts
	Difference: 180 Watts (257%)

Memory Bandwidth

Performance-wise, the Geforce GTX 780 should in theory be a lot better than the GeForce GT 240 GDDR5 in general. (explain)

Geforce GTX 780		288384 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 233984 (430%)

Texel Rate

The Geforce GTX 780 should be much (approximately 841%) faster with regards to AF than the GeForce GT 240 GDDR5. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 148096 (841%)

Pixel Rate

If using a high screen resolution is important to you, then the Geforce GTX 780 is superior to the GeForce GT 240 GDDR5, by a large margin. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 37024 (841%)

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 megabytes per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 can be processed in one second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher 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 maximum amount of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of 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.