Radeon HD 7770 vs Radeon RX 6800

Intro

Compare those specs to the Radeon RX 6800, which uses a 7 nm design. AMD has clocked the core frequency at 1700 MHz. The GDDR6 memory runs at a frequency of 2000 MHz on this specific card. It features 3840 SPUs along with 240 Texture Address Units and 96 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
Radeon RX 6800		250 Watts
	Difference: 170 Watts (213%)

Memory Bandwidth

The Radeon RX 6800, in theory, should be quite a bit faster than the Radeon HD 7770 overall. (explain)

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

Texel Rate

The Radeon RX 6800 should be quite a bit (about 920%) better at anisotropic filtering than the Radeon HD 7770. (explain)

Radeon RX 6800		408000 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 368000 (920%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon RX 6800 is a better choice, and very much so. (explain)

Radeon RX 6800		163200 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 147200 (920%)

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 max amount of data (in units of MB per second) that can be transported across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 processed in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

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