GeForce GT 340 vs Geforce GTX 670

Intro

Compare those specs to the Geforce GTX 670, which has a GPU core clock speed of 915 MHz, and 2048 MB of GDDR5 RAM running at 1500 MHz through a 256-bit bus. It also is made up of 1344 SPUs, 112 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340		69 Watts
Geforce GTX 670		170 Watts
	Difference: 101 Watts (146%)

Memory Bandwidth

As far as performance goes, the Geforce GTX 670 should in theory be much better than the GeForce GT 340 overall. (explain)

Geforce GTX 670		192000 MB/sec
GeForce GT 340		54400 MB/sec
	Difference: 137600 (253%)

Texel Rate

The Geforce GTX 670 should be quite a bit (approximately 482%) more effective at texture filtering than the GeForce GT 340. (explain)

Geforce GTX 670		102480 Mtexels/sec
GeForce GT 340		17600 Mtexels/sec
	Difference: 84880 (482%)

Pixel Rate

The Geforce GTX 670 is a lot (about 565%) better at AA than the GeForce GT 340, and also will be able to handle higher screen resolutions better. (explain)

Geforce GTX 670		29280 Mpixels/sec
GeForce GT 340		4400 Mpixels/sec
	Difference: 24880 (565%)

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 data (counted in megabytes per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the 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 texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units by the core 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.