Radeon HD 7950 3GB vs Radeon RX 580

Intro

Compare those specifications to the Radeon RX 580, which makes use of a 14 nm design. AMD has clocked the core frequency at 1257 MHz. The GDDR5 RAM is set to run at a speed of 2000 MHz on this specific card. It features 2304 SPUs along with 144 Texture Address Units and 32 Rasterization Operator Units.

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.

Zcash Mining Hash Rate

Radeon RX 580		315 Sol/s
Radeon HD 7950 3GB		229 Sol/s
	Difference: 86 (38%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 580		185 Watts
Radeon HD 7950 3GB		200 Watts
	Difference: 15 Watts (8%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 580 will be 9% faster than the Radeon HD 7950 3GB in general, due to its greater data rate. (explain)

Radeon RX 580		262144 MB/sec
Radeon HD 7950 3GB		240000 MB/sec
	Difference: 22144 (9%)

Texel Rate

The Radeon RX 580 should be quite a bit (more or less 102%) more effective at texture filtering than the Radeon HD 7950 3GB. (explain)

Radeon RX 580		181008 Mtexels/sec
Radeon HD 7950 3GB		89600 Mtexels/sec
	Difference: 91408 (102%)

Pixel Rate

The Radeon RX 580 should be a lot (approximately 57%) more effective at anti-aliasing than the Radeon HD 7950 3GB, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon RX 580		40224 Mpixels/sec
Radeon HD 7950 3GB		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 (measured in MB per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units by the core 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.