Radeon HD 7770 vs Radeon RX 6800 XT

Intro

Compare all of that to the Radeon RX 6800 XT, which makes use of a 7 nm design. AMD has clocked the core speed at 1825 MHz. The GDDR6 memory runs at a frequency of 2000 MHz on this card. It features 4608 SPUs as well as 288 TAUs and 128 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon RX 6800 XT		300 Watts
	Difference: 220 Watts (275%)

Memory Bandwidth

As far as performance goes, the Radeon RX 6800 XT should theoretically be much superior to the Radeon HD 7770 in general. (explain)

Radeon RX 6800 XT		524288 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 452288 (628%)

Texel Rate

The Radeon RX 6800 XT should be a lot (more or less 1214%) better at anisotropic filtering than the Radeon HD 7770. (explain)

Radeon RX 6800 XT		525600 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 485600 (1214%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon RX 6800 XT is the winner, by a large margin. (explain)

Radeon RX 6800 XT		233600 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 217600 (1360%)

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 data (measured in megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses 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 texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

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