GeForce GT 340 vs Geforce GTX 780

Intro

Compare those specs to the Geforce GTX 780, which has a GPU core clock speed of 863 MHz, and 3072 MB of GDDR5 RAM running at 1502 MHz through a 384-bit bus. It also is comprised of 2304 Stream Processors, 192 TAUs, and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

Theoretically speaking, the Geforce GTX 780 is 430% faster than the GeForce GT 340 overall, due to its greater bandwidth. (explain)

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

Texel Rate

The Geforce GTX 780 should be much (approximately 841%) better at anisotropic filtering than the GeForce GT 340. (explain)

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

Pixel Rate

The Geforce GTX 780 is a lot (approximately 841%) faster with regards to FSAA than the GeForce GT 340, and should be able to handle higher screen resolutions more effectively. (explain)

Geforce GTX 780		41424 Mpixels/sec
GeForce GT 340		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 largest amount of data (in units of megabytes per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the interface width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 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 AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.