Radeon HD 7950 vs Radeon RX 580

Intro

Compare all that to the Radeon RX 580, which uses a 14 nm design. AMD has set the core speed at 1257 MHz. The GDDR5 memory works at a speed of 2000 MHz on this specific model. It features 2304 SPUs as well as 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 RX 580		13630 points
Radeon HD 7950		7731 points
	Difference: 5899 (76%)

Zcash Mining Hash Rate

Radeon RX 580		315 Sol/s
Radeon HD 7950		235 Sol/s
	Difference: 80 (34%)

Ethereum Mining Hash Rate

Radeon RX 580		28 Mh/s
Radeon HD 7950		21 Mh/s
	Difference: 7 (33%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 580		185 Watts
Radeon HD 7950		200 Watts
	Difference: 15 Watts (8%)

Memory Bandwidth

Performance-wise, the Radeon RX 580 should in theory be a small bit superior to the Radeon HD 7950 in general. (explain)

Radeon RX 580		262144 MB/sec
Radeon HD 7950		240000 MB/sec
	Difference: 22144 (9%)

Texel Rate

The Radeon RX 580 will be much (more or less 102%) better at AF than the Radeon HD 7950. (explain)

Radeon RX 580		181008 Mtexels/sec
Radeon HD 7950		89600 Mtexels/sec
	Difference: 91408 (102%)

Pixel Rate

The Radeon RX 580 should be a lot (about 57%) faster with regards to full screen anti-aliasing than the Radeon HD 7950, and also able to handle higher resolutions without slowing down too much. (explain)

Radeon RX 580		40224 Mpixels/sec
Radeon HD 7950		25600 Mpixels/sec
	Difference: 14624 (57%)

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 max amount of data (in units of MB per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is calculated 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel 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 ability to get to the maximum fill rate.