GeForce GT 340 1GB vs GeForce GTX 285 1GB

Intro

Compare those specs to the GeForce GTX 285 1GB, which has GPU core speed of 648 MHz, and 1024 MB of GDDR3 RAM set to run at 1242 MHz through a 512-bit bus. It also is comprised of 240 Stream Processors, 80 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 340 1GB		69 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 135 Watts (196%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 285 1GB is 192% faster than the GeForce GT 340 1GB overall, because of its greater data rate. (explain)

GeForce GTX 285 1GB		158976 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 104576 (192%)

Texel Rate

The GeForce GTX 285 1GB will be a lot (about 195%) faster with regards to AF than the GeForce GT 340 1GB. (explain)

GeForce GTX 285 1GB		51840 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 34240 (195%)

Pixel Rate

The GeForce GTX 285 1GB will be a lot (approximately 371%) better at full screen anti-aliasing than the GeForce GT 340 1GB, and able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 285 1GB		20736 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 16336 (371%)

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 (measured in megabytes per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. 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 amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total number of texture units by the core clock 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 processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.