Radeon HD 7950 vs Radeon R9 380 4G

Intro

Compare all of that to the Radeon R9 380 4G, which uses a 28 nm design. AMD has clocked the core frequency at 970 MHz. The GDDR5 RAM is set to run at a frequency of 1425 MHz on this model. It features 1792 SPUs as well as 112 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.

3DMark Fire Strike Graphics Score

Radeon R9 380 4G		8837 points
Radeon HD 7950		7731 points
	Difference: 1106 (14%)

Ethereum Mining Hash Rate

Radeon HD 7950		21 Mh/s
Radeon R9 380 4G		21 Mh/s
	Difference: 0 (0%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380 4G		190 Watts
Radeon HD 7950		200 Watts
	Difference: 10 Watts (5%)

Memory Bandwidth

The Radeon HD 7950, in theory, should perform much faster than the Radeon R9 380 4G overall. (explain)

Radeon HD 7950		240000 MB/sec
Radeon R9 380 4G		182400 MB/sec
	Difference: 57600 (32%)

Texel Rate

The Radeon R9 380 4G should be a lot (about 21%) more effective at AF than the Radeon HD 7950. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
Radeon HD 7950		89600 Mtexels/sec
	Difference: 19040 (21%)

Pixel Rate

The Radeon R9 380 4G is much (approximately 21%) faster with regards to full screen anti-aliasing than the Radeon HD 7950, and capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
Radeon HD 7950		25600 Mpixels/sec
	Difference: 5440 (21%)

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 (counted in megabytes per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.