GeForce RTX 3080 12 GB vs Radeon HD 7870

Intro

Compare all that to the Radeon HD 7870, which features GPU clock speed of 1000 MHz, and 2048 MB of GDDR5 RAM set to run at 1200 MHz through a 256-bit bus. It also features 1280 Stream Processors, 80 Texture Address Units, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870		175 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 175 Watts (100%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 3080 12 GB should be a lot faster than the Radeon HD 7870 in general. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Radeon HD 7870		153600 MB/sec
	Difference: 780698 (508%)

Texel Rate

The GeForce RTX 3080 12 GB will be a lot (about 341%) faster with regards to AF than the Radeon HD 7870. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
Radeon HD 7870		80000 Mtexels/sec
	Difference: 272800 (341%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce RTX 3080 12 GB is the winner, by a large margin. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
Radeon HD 7870		32000 Mpixels/sec
	Difference: 109120 (341%)

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 maximum amount of information (in units of MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs 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 fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.