Radeon HD 7870 vs Radeon R9 380 2G

Intro

Compare all of that to the Radeon R9 380 2G, which comes with a GPU core clock speed of 970 MHz, and 2048 MB of GDDR5 RAM set to run at 1425 MHz through a 256-bit bus. It also is made up of 1792 Stream Processors, 112 TAUs, and 32 Raster Operation Units.

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 7870		6230 points
	Difference: 2620 (42%)

Ethereum Mining Hash Rate

Radeon R9 380 2G		19 Mh/s
Radeon HD 7870		16 Mh/s
	Difference: 3 (19%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870		175 Watts
Radeon R9 380 2G		190 Watts
	Difference: 15 Watts (9%)

Memory Bandwidth

As far as performance goes, the Radeon R9 380 2G should theoretically be a small bit superior to the Radeon HD 7870 in general. (explain)

Radeon R9 380 2G		182400 MB/sec
Radeon HD 7870		153600 MB/sec
	Difference: 28800 (19%)

Texel Rate

The Radeon R9 380 2G will be quite a bit (about 36%) more effective at AF than the Radeon HD 7870. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
Radeon HD 7870		80000 Mtexels/sec
	Difference: 28640 (36%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7870 is superior to the Radeon R9 380 2G, but it probably won't make a huge difference. (explain)

Radeon HD 7870		32000 Mpixels/sec
Radeon R9 380 2G		31040 Mpixels/sec
	Difference: 960 (3%)

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 largest amount of information (counted in megabytes per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record 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 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.