Radeon HD 7970 vs Radeon R9 380 4G

Intro

Compare all of that to the Radeon R9 380 4G, which has a GPU core clock speed of 970 MHz, and 4096 MB of GDDR5 memory set to run at 1425 MHz through a 256-bit bus. It also is made up of 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 4G		8837 points
Radeon HD 7970		8225 points
	Difference: 612 (7%)

Ethereum Mining Hash Rate

Radeon HD 7970		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 7970		250 Watts
	Difference: 60 Watts (32%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7970 should perform a lot faster than the Radeon R9 380 4G overall. (explain)

Radeon HD 7970		264000 MB/sec
Radeon R9 380 4G		182400 MB/sec
	Difference: 81600 (45%)

Texel Rate

The Radeon HD 7970 should be a bit (more or less 9%) more effective at texture filtering than the Radeon R9 380 4G. (explain)

Radeon HD 7970		118400 Mtexels/sec
Radeon R9 380 4G		108640 Mtexels/sec
	Difference: 9760 (9%)

Pixel Rate

The Radeon R9 380 4G is a bit (more or less 5%) faster with regards to full screen anti-aliasing than the Radeon HD 7970, and capable of handling higher resolutions without losing too much performance. (explain)

Radeon R9 380 4G		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: Memory bandwidth is the max amount of information (measured in MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total number of texture units of the card by the core 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 most pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.