Radeon HD 7950 3GB vs Radeon RX 470 4GB

Intro

Compare that to the Radeon RX 470 4GB, which features a core clock frequency 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 features 2048 SPUs, 128 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 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 overall, 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 will be a lot (more or less 32%) more effective at AF 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 using a high screen resolution is important to you, then the Radeon RX 470 4GB is superior to the Radeon HD 7950 3GB, 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: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The better this number, 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 that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel 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 reach the maximum fill rate.