GeForce GT 340 1GB vs Geforce GTX 690

Intro

Compare all that to the Geforce GTX 690, which uses a 28 nm design. nVidia has set the core frequency at 915 MHz. The GDDR5 RAM runs at a speed of 1502 MHz on this particular card. It features 1536 SPUs as well as 128 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 690		300 Watts
	Difference: 231 Watts (335%)

Memory Bandwidth

In theory, the Geforce GTX 690 should be much faster than the GeForce GT 340 1GB overall. (explain)

Geforce GTX 690		384512 MB/sec
GeForce GT 340 1GB		54400 MB/sec
	Difference: 330112 (607%)

Texel Rate

The Geforce GTX 690 should be much (approximately 1231%) faster with regards to texture filtering than the GeForce GT 340 1GB. (explain)

Geforce GTX 690		234240 Mtexels/sec
GeForce GT 340 1GB		17600 Mtexels/sec
	Difference: 216640 (1231%)

Pixel Rate

The Geforce GTX 690 is a lot (more or less 1231%) better at FSAA than the GeForce GT 340 1GB, and capable of handling higher resolutions without losing too much performance. (explain)

Geforce GTX 690		58560 Mpixels/sec
GeForce GT 340 1GB		4400 Mpixels/sec
	Difference: 54160 (1231%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in megabytes per second) that can be transported over the external memory interface in one second. It is worked out by multiplying the card's 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 AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out 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 outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.