Radeon HD 7990 vs Radeon RX 480 4GB

Intro

Compare all of that to the Radeon RX 480 4GB, which has GPU clock speed of 1120 MHz, and 4096 MB of GDDR5 memory set to run at 1750 MHz through a 256-bit bus. It also is made up of 2304 Stream Processors, 144 TAUs, 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.

Ethereum Mining Hash Rate

Radeon HD 7990		32 Mh/s
Radeon RX 480 4GB		25 Mh/s
	Difference: 7 (28%)

Zcash Mining Hash Rate

Radeon HD 7990		513 Sol/s
Radeon RX 480 4GB		267 Sol/s
	Difference: 246 (92%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480 4GB		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 4GB in general. (explain)

Radeon HD 7990		576000 MB/sec
Radeon RX 480 4GB		229376 MB/sec
	Difference: 346624 (151%)

Texel Rate

The Radeon HD 7990 is quite a bit (more or less 51%) more effective at texture filtering than the Radeon RX 480 4GB. (explain)

Radeon HD 7990		243200 Mtexels/sec
Radeon RX 480 4GB		161280 Mtexels/sec
	Difference: 81920 (51%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 7990 is superior to the Radeon RX 480 4GB, by far. (explain)

Radeon HD 7990		60800 Mpixels/sec
Radeon RX 480 4GB		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: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better 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 texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics 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 most pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.