Radeon HD 7950 3GB vs Radeon RX 580

Intro

Compare all that to the Radeon RX 580, which features core speeds of 1257 MHz on the GPU, and 2000 MHz on the 8192 MB of GDDR5 RAM. 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.

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 overall, 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 (approximately 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

If running with a high screen resolution is important to you, then the Radeon RX 580 is a better choice, by far. (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: Bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's 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 amount of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.