GeForce RTX 3080 12 GB vs Geforce GTX 690

Intro

Compare those specs to the Geforce GTX 690, which uses a 28 nm design. nVidia has clocked the core speed at 915 MHz. The GDDR5 memory runs at a frequency of 1502 MHz on this particular card. It features 1536 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Geforce GTX 690		300 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 50 Watts (17%)

Memory Bandwidth

In theory, the GeForce RTX 3080 12 GB should be a lot faster than the Geforce GTX 690 overall. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Geforce GTX 690		384512 MB/sec
	Difference: 549786 (143%)

Texel Rate

The GeForce RTX 3080 12 GB will be a lot (approximately 51%) faster with regards to AF than the Geforce GTX 690. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
Geforce GTX 690		234240 Mtexels/sec
	Difference: 118560 (51%)

Pixel Rate

The GeForce RTX 3080 12 GB should be quite a bit (more or less 141%) more effective at AA than the Geforce GTX 690, and also able to handle higher resolutions without slowing down too much. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
Geforce GTX 690		58560 Mpixels/sec
	Difference: 82560 (141%)

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: Bandwidth is the maximum amount of data (in units of MB per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, 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 number is calculated by multiplying the total texture units by the core 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.