GeForce RTX 3080 12 GB vs Radeon HD 7770

Intro

Compare those specs to the Radeon HD 7770, which comes with a core clock speed of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It features 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770		80 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 270 Watts (338%)

Memory Bandwidth

In theory, the GeForce RTX 3080 12 GB will be 1198% quicker than the Radeon HD 7770 overall, due to its greater data rate. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 862298 (1198%)

Texel Rate

The GeForce RTX 3080 12 GB should be much (approximately 782%) better at anisotropic filtering than the Radeon HD 7770. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 312800 (782%)

Pixel Rate

The GeForce RTX 3080 12 GB will be quite a bit (approximately 782%) more effective at AA than the Radeon HD 7770, and will be able to handle higher resolutions more effectively. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 125120 (782%)

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 max amount of information (in units of MB per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core 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 also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.