GeForce GT 340 vs Geforce GTX 670

Intro

Compare all that to the Geforce GTX 670, which features core speeds of 915 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 RAM. It features 1344 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.

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

Theoretically speaking, the Geforce GTX 670 should be 253% quicker than the GeForce GT 340 overall, due to its greater data rate. (explain)

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

Texel Rate

The Geforce GTX 670 should be a lot (more or less 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 much (more or less 565%) faster with regards to anti-aliasing than the GeForce GT 340, and able to handle higher screen resolutions more effectively. (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 maximum amount of information (in units of MB per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video 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 that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.