Radeon HD 7950 3GB vs Radeon RX 480 4GB

Intro

Compare those specifications to the Radeon RX 480 4GB, which comes with a core clock frequency of 1120 MHz and a GDDR5 memory speed of 1750 MHz. It also makes use of a 256-bit memory bus, and makes use of a 14 nm design. It features 2304 SPUs, 144 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 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 should be a bit faster than the Radeon RX 480 4GB in general. (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 will be quite a bit (more or less 80%) more effective at AF 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 is much (more or less 40%) more effective at anti-aliasing than the Radeon HD 7950 3GB, and also should be capable of handling higher 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: Bandwidth is the max amount of information (counted in megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the 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 number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, 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 amount of pixels the graphics card can possibly write to its local memory in a 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 - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.