Radeon HD 7990 vs Radeon RX 480

Intro

Compare all that to the Radeon RX 480, which has GPU clock speed of 1120 MHz, and 8192 MB of GDDR5 memory running at 2000 MHz through a 256-bit bus. It also is comprised of 2304 Stream Processors, 144 Texture Address Units, and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7990		15520 points
Radeon RX 480		13349 points
	Difference: 2171 (16%)

Ethereum Mining Hash Rate

Radeon HD 7990		32 Mh/s
Radeon RX 480		27 Mh/s
	Difference: 5 (19%)

Zcash Mining Hash Rate

Radeon HD 7990		513 Sol/s
Radeon RX 480		280 Sol/s
	Difference: 233 (83%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480		150 Watts
Radeon HD 7990		375 Watts
	Difference: 225 Watts (150%)

Memory Bandwidth

Theoretically, the Radeon HD 7990 should perform quite a bit faster than the Radeon RX 480 in general. (explain)

Radeon HD 7990		576000 MB/sec
Radeon RX 480		262144 MB/sec
	Difference: 313856 (120%)

Texel Rate

The Radeon HD 7990 should be much (more or less 51%) more effective at texture filtering than the Radeon RX 480. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon RX 480		161280 Mtexels/sec
	Difference: 81920 (51%)

Pixel Rate

The Radeon HD 7990 is a lot (approximately 70%) faster with regards to full screen anti-aliasing than the Radeon RX 480, and will be able to handle higher resolutions better. (explain)

Radeon HD 7990		60800 Mpixels/sec
Radeon RX 480		35840 Mpixels/sec
	Difference: 24960 (70%)

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: Bandwidth is the maximum amount of information (counted in MB per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 processed in one second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can 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 Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.