Radeon HD 7970 vs Radeon R9 380 2G

Intro

Compare all of that to the Radeon R9 380 2G, which features a core 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 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 2G		8850 points
Radeon HD 7970		8225 points
	Difference: 625 (8%)

Ethereum Mining Hash Rate

Radeon HD 7970		21 Mh/s
Radeon R9 380 2G		19 Mh/s
	Difference: 2 (11%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380 2G		190 Watts
Radeon HD 7970		250 Watts
	Difference: 60 Watts (32%)

Memory Bandwidth

In theory, the Radeon HD 7970 should be much faster than the Radeon R9 380 2G in general. (explain)

Radeon HD 7970		264000 MB/sec
Radeon R9 380 2G		182400 MB/sec
	Difference: 81600 (45%)

Texel Rate

The Radeon HD 7970 is just a bit (approximately 9%) more effective at texture filtering than the Radeon R9 380 2G. (explain)

Radeon HD 7970		118400 Mtexels/sec
Radeon R9 380 2G		108640 Mtexels/sec
	Difference: 9760 (9%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 380 2G is a better choice, but not by far. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
Radeon HD 7970		29600 Mpixels/sec
	Difference: 1440 (5%)

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 transferred past the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. 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 texture map elements (texels) that are applied per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour 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 many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.