Radeon HD 7850 vs Radeon RX 5700 XT

Intro

Compare that to the Radeon RX 5700 XT, which features a core clock frequency of 1605 MHz and a GDDR6 memory speed of 1750 MHz. It also features a 256-bit memory bus, and makes use of a 7 nm design. It is comprised of 2560 SPUs, 160 TAUs, and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850		130 Watts
Radeon RX 5700 XT		225 Watts
	Difference: 95 Watts (73%)

Memory Bandwidth

Theoretically, the Radeon RX 5700 XT should perform a lot faster than the Radeon HD 7850 in general. (explain)

Radeon RX 5700 XT		458752 MB/sec
Radeon HD 7850		153600 MB/sec
	Difference: 305152 (199%)

Texel Rate

The Radeon RX 5700 XT is quite a bit (approximately 367%) more effective at anisotropic filtering than the Radeon HD 7850. (explain)

Radeon RX 5700 XT		256800 Mtexels/sec
Radeon HD 7850		55040 Mtexels/sec
	Difference: 201760 (367%)

Pixel Rate

The Radeon RX 5700 XT will be a lot (about 273%) better at FSAA than the Radeon HD 7850, and also capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon RX 5700 XT		102720 Mpixels/sec
Radeon HD 7850		27520 Mpixels/sec
	Difference: 75200 (273%)

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 (in units of megabytes per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it should 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 anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.