Radeon HD 7950 3GB vs Radeon RX 480 4GB

Intro

Compare those specs to the Radeon RX 480 4GB, which uses a 14 nm design. AMD has clocked the core frequency at 1120 MHz. The GDDR5 memory runs at a frequency of 1750 MHz on this particular model. It features 2304 SPUs along with 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 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

Theoretically, the Radeon HD 7950 3GB should perform just a bit faster than the Radeon RX 480 4GB overall. (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 a lot (about 80%) more effective at anisotropic 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

The Radeon RX 480 4GB will be quite a bit (about 40%) faster with regards to full screen anti-aliasing than the Radeon HD 7950 3GB, and also should be capable of handling higher screen resolutions while still performing well. (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: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.