GeForce RTX 3080 Ti vs Radeon HD 7870 XT

Intro

Compare those specs to the Radeon HD 7870 XT, which has GPU clock speed of 925 MHz, and 2048 MB of GDDR5 RAM set to run at 1500 MHz through a 256-bit bus. It also is made up of 1536 SPUs, 96 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 XT		185 Watts
GeForce RTX 3080 Ti		350 Watts
	Difference: 165 Watts (89%)

Memory Bandwidth

As far as performance goes, the GeForce RTX 3080 Ti should theoretically be quite a bit better than the Radeon HD 7870 XT overall. (explain)

GeForce RTX 3080 Ti		934297 MB/sec
Radeon HD 7870 XT		192000 MB/sec
	Difference: 742297 (387%)

Texel Rate

The GeForce RTX 3080 Ti will be much (about 392%) more effective at texture filtering than the Radeon HD 7870 XT. (explain)

GeForce RTX 3080 Ti		436800 Mtexels/sec
Radeon HD 7870 XT		88800 Mtexels/sec
	Difference: 348000 (392%)

Pixel Rate

If using a high resolution is important to you, then the GeForce RTX 3080 Ti is superior to the Radeon HD 7870 XT, by far. (explain)

GeForce RTX 3080 Ti		152880 Mpixels/sec
Radeon HD 7870 XT		29600 Mpixels/sec
	Difference: 123280 (416%)

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: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR 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 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.