GeForce RTX 3080 12 GB vs Radeon HD 6990

Intro

Compare all that to the Radeon HD 6990, which has core speeds of 830 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 memory. It features 1536 SPUs as well as 96 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce RTX 3080 12 GB		350 Watts
Radeon HD 6990		375 Watts
	Difference: 25 Watts (7%)

Memory Bandwidth

Performance-wise, the GeForce RTX 3080 12 GB should theoretically be a lot superior to the Radeon HD 6990 in general. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Radeon HD 6990		320000 MB/sec
	Difference: 614298 (192%)

Texel Rate

The GeForce RTX 3080 12 GB is much (about 121%) better at AF than the Radeon HD 6990. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
Radeon HD 6990		159360 Mtexels/sec
	Difference: 193440 (121%)

Pixel Rate

The GeForce RTX 3080 12 GB should be quite a bit (more or less 166%) better at anti-aliasing than the Radeon HD 6990, and also will be able to handle higher resolutions without losing too much performance. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
Radeon HD 6990		53120 Mpixels/sec
	Difference: 88000 (166%)

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 max amount of information (counted in megabytes per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, 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 number of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs 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 - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.