Radeon HD 7950 3GB vs Radeon RX 470 4GB

Intro

Compare those specs to the Radeon RX 470 4GB, which comes with a clock speed of 926 MHz and a GDDR5 memory frequency of 1650 MHz. It also features a 256-bit bus, and makes use of a 14 nm design. It is made up of 2048 SPUs, 128 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.

Zcash Mining Hash Rate

Radeon RX 470 4GB		270 Sol/s
Radeon HD 7950 3GB		229 Sol/s
	Difference: 41 (18%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 470 4GB		120 Watts
Radeon HD 7950 3GB		200 Watts
	Difference: 80 Watts (67%)

Memory Bandwidth

In theory, the Radeon HD 7950 3GB should be 14% faster than the Radeon RX 470 4GB in general, because of its higher bandwidth. (explain)

Radeon HD 7950 3GB		240000 MB/sec
Radeon RX 470 4GB		211200 MB/sec
	Difference: 28800 (14%)

Texel Rate

The Radeon RX 470 4GB should be quite a bit (about 32%) more effective at texture filtering than the Radeon HD 7950 3GB. (explain)

Radeon RX 470 4GB		118528 Mtexels/sec
Radeon HD 7950 3GB		89600 Mtexels/sec
	Difference: 28928 (32%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX 470 4GB is a better choice, not by a very large margin though. (explain)

Radeon RX 470 4GB		29632 Mpixels/sec
Radeon HD 7950 3GB		25600 Mpixels/sec
	Difference: 4032 (16%)

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 maximum amount of data (measured in megabytes per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, 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 that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.