GeForce RTX 3080 12 GB vs Radeon HD 7790

Intro

Compare those specs to the Radeon HD 7790, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM runs at a speed of 1500 MHz on this particular card. It features 896 SPUs as well as 56 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790		85 Watts
GeForce RTX 3080 12 GB		350 Watts
	Difference: 265 Watts (312%)

Memory Bandwidth

Theoretically speaking, the GeForce RTX 3080 12 GB is 873% quicker than the Radeon HD 7790 in general, because of its greater data rate. (explain)

GeForce RTX 3080 12 GB		934298 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 838298 (873%)

Texel Rate

The GeForce RTX 3080 12 GB is a lot (approximately 530%) faster with regards to anisotropic filtering than the Radeon HD 7790. (explain)

GeForce RTX 3080 12 GB		352800 Mtexels/sec
Radeon HD 7790		56000 Mtexels/sec
	Difference: 296800 (530%)

Pixel Rate

The GeForce RTX 3080 12 GB will be much (approximately 782%) faster with regards to FSAA than the Radeon HD 7790, and also capable of handling higher resolutions while still performing well. (explain)

GeForce RTX 3080 12 GB		141120 Mpixels/sec
Radeon HD 7790		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 maximum amount of information (in units of megabytes per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher 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 number of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.