Radeon HD 7950 3GB vs Radeon RX 480 4GB

Intro

Compare that to the Radeon RX 480 4GB, which comes with a core clock speed of 1120 MHz and a GDDR5 memory frequency of 1750 MHz. It also makes use of a 256-bit bus, and uses a 14 nm design. It is made up of 2304 SPUs, 144 Texture Address Units, and 32 Raster Operation 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 480 4GB		267 Sol/s
Radeon HD 7950 3GB		229 Sol/s
	Difference: 38 (17%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480 4GB		150 Watts
Radeon HD 7950 3GB		200 Watts
	Difference: 50 Watts (33%)

Memory Bandwidth

In theory, the Radeon HD 7950 3GB will be 5% quicker than the Radeon RX 480 4GB overall, due to its greater bandwidth. (explain)

Radeon HD 7950 3GB		240000 MB/sec
Radeon RX 480 4GB		229376 MB/sec
	Difference: 10624 (5%)

Texel Rate

The Radeon RX 480 4GB should be much (more or less 80%) more effective at texture filtering than the Radeon HD 7950 3GB. (explain)

Radeon RX 480 4GB		161280 Mtexels/sec
Radeon HD 7950 3GB		89600 Mtexels/sec
	Difference: 71680 (80%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon RX 480 4GB is superior to the Radeon HD 7950 3GB, by far. (explain)

Radeon RX 480 4GB		35840 Mpixels/sec
Radeon HD 7950 3GB		25600 Mpixels/sec
	Difference: 10240 (40%)

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 information (measured in MB per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

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