Radeon HD 7950 vs Radeon R9 380 4G

Intro

Compare that to the Radeon R9 380 4G, which comes with a clock frequency of 970 MHz and a GDDR5 memory frequency of 1425 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It features 1792 SPUs, 112 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.

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 should theoretically perform quite a bit 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 is a lot (about 21%) more effective at texture filtering 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 should be quite a bit (more or less 21%) faster with regards to full screen anti-aliasing than the Radeon HD 7950, and also able to handle higher screen resolutions while still performing well. (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: Bandwidth is the maximum amount of information (in units of MB per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the 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 number of texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.