GeForce GT 340 1GB vs Geforce GTX 780

Intro

Compare those specs to the Geforce GTX 780, which features a GPU core 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 SPUs, 192 Texture Address Units, and 48 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
Geforce GTX 780		250 Watts
	Difference: 181 Watts (262%)

Memory Bandwidth

In theory, the Geforce GTX 780 is 430% faster than the GeForce GT 340 1GB in general, due to its greater bandwidth. (explain)

Geforce GTX 780		288384 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 233984 (430%)

Texel Rate

The Geforce GTX 780 will be a lot (more or less 841%) better at AF than the GeForce GT 340 1GB. (explain)

Geforce GTX 780		165696 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 148096 (841%)

Pixel Rate

The Geforce GTX 780 should be quite a bit (approximately 841%) faster with regards to FSAA than the GeForce GT 340 1GB, and capable of handling higher resolutions without losing too much performance. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce GT 340 1GB		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: Bandwidth is the max amount of information (in units of megabytes per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling 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 card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.