Radeon HD 6790 vs Radeon RX 5700 XT

Intro

Compare all of that to the Radeon RX 5700 XT, which has GPU clock speed of 1605 MHz, and 8096 MB of GDDR6 memory running at 1750 MHz through a 256-bit bus. It also features 2560 SPUs, 160 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790		150 Watts
Radeon RX 5700 XT		225 Watts
	Difference: 75 Watts (50%)

Memory Bandwidth

The Radeon RX 5700 XT should theoretically be a lot faster than the Radeon HD 6790 in general. (explain)

Radeon RX 5700 XT		458752 MB/sec
Radeon HD 6790		134400 MB/sec
	Difference: 324352 (241%)

Texel Rate

The Radeon RX 5700 XT is quite a bit (about 664%) better at texture filtering than the Radeon HD 6790. (explain)

Radeon RX 5700 XT		256800 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 223200 (664%)

Pixel Rate

The Radeon RX 5700 XT should be quite a bit (about 664%) more effective at FSAA than the Radeon HD 6790, and also will be capable of handling higher screen resolutions better. (explain)

Radeon RX 5700 XT		102720 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 89280 (664%)

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 (counted in megabytes per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units 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 amount of pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.