Radeon HD 7990 vs Radeon RX 5700

Intro

Compare those specs to the Radeon RX 5700, which comes with clock speeds of 1465 MHz on the GPU, and 1750 MHz on the 8096 MB of GDDR6 RAM. It features 2304 SPUs as well as 144 Texture Address Units and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5700		180 Watts
Radeon HD 7990		375 Watts
	Difference: 195 Watts (108%)

Memory Bandwidth

The Radeon HD 7990, in theory, should perform a lot faster than the Radeon RX 5700 in general. (explain)

Radeon HD 7990		576000 MB/sec
Radeon RX 5700		458752 MB/sec
	Difference: 117248 (26%)

Texel Rate

The Radeon HD 7990 should be a bit (about 15%) faster with regards to texture filtering than the Radeon RX 5700. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon RX 5700		210960 Mtexels/sec
	Difference: 32240 (15%)

Pixel Rate

The Radeon RX 5700 is a lot (about 54%) faster with regards to FSAA than the Radeon HD 7990, and should be able to handle higher resolutions while still performing well. (explain)

Radeon RX 5700		93760 Mpixels/sec
Radeon HD 7990		60800 Mpixels/sec
	Difference: 32960 (54%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the 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 better the card's memory bandwidth, the faster 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 are applied per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its 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 core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.