Radeon HD 7950 3GB vs Radeon RX 470 4GB

Intro

Compare that to the Radeon RX 470 4GB, which makes use of a 14 nm design. AMD has clocked the core speed at 926 MHz. The GDDR5 RAM is set to run at a speed of 1650 MHz on this model. It features 2048 SPUs as well as 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

Theoretically speaking, the Radeon HD 7950 3GB is 14% quicker than the Radeon RX 470 4GB overall, because of its greater data rate. (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 much (approximately 32%) better at anisotropic 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

The Radeon RX 470 4GB is a bit (about 16%) better at FSAA than the Radeon HD 7950 3GB, and also should be capable of handling higher screen resolutions without losing too much performance. (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 MB per second) that can be transferred 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 the card has DDR memory, it must be multiplied by 2 once 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 applied in one second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in one 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 - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.