GeForce RTX 3080 12 GB vs Radeon HD 6870

Intro

Compare that to the Radeon HD 6870, which has clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 1120 SPUs as well as 56 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6870		151 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 199 Watts (132%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 3080 12 GB is 595% quicker than the Radeon HD 6870 overall, due to its greater bandwidth. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Radeon HD 6870		134400 MB/sec
	Difference: 799898 (595%)

Texel Rate

The GeForce RTX 3080 12 GB should be much (about 600%) faster with regards to anisotropic filtering than the Radeon HD 6870. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
Radeon HD 6870		50400 Mtexels/sec
	Difference: 302400 (600%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce RTX 3080 12 GB is a better choice, by a large margin. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
Radeon HD 6870		28800 Mpixels/sec
	Difference: 112320 (390%)

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: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.