Geforce GTX 680 vs Geforce GTX 690

Intro

Compare those specs to the Geforce GTX 690, which makes use of a 28 nm design. nVidia has set the core speed at 915 MHz. The GDDR5 RAM is set to run at a frequency of 1502 MHz on this model. It features 1536 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Geforce GTX 690		13111 points
Geforce GTX 680		7650 points
	Difference: 5461 (71%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 680		195 Watts
Geforce GTX 690		300 Watts
	Difference: 105 Watts (54%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 690 is 100% faster than the Geforce GTX 680 in general, because of its higher bandwidth. (explain)

Geforce GTX 690		384512 MB/sec
Geforce GTX 680		192256 MB/sec
	Difference: 192256 (100%)

Texel Rate

The Geforce GTX 690 is quite a bit (about 82%) better at anisotropic filtering than the Geforce GTX 680. (explain)

Geforce GTX 690		234240 Mtexels/sec
Geforce GTX 680		128768 Mtexels/sec
	Difference: 105472 (82%)

Pixel Rate

The Geforce GTX 690 should be a lot (more or less 82%) faster with regards to AA than the Geforce GTX 680, and should be able to handle higher resolutions without losing too much performance. (explain)

Geforce GTX 690		58560 Mpixels/sec
Geforce GTX 680		32192 Mpixels/sec
	Difference: 26368 (82%)

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 MB per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.