Radeon HD 7870 vs Radeon R9 380X

Intro

Compare that to the Radeon R9 380X, which comes with clock speeds of 970 MHz on the GPU, and 1425 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator 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 380X		9519 points
Radeon HD 7870		6230 points
	Difference: 3289 (53%)

Ethereum Mining Hash Rate

Radeon R9 380X		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 380X		190 Watts
	Difference: 15 Watts (9%)

Memory Bandwidth

Theoretically, the Radeon R9 380X should perform a small bit faster than the Radeon HD 7870 in general. (explain)

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

Texel Rate

The Radeon R9 380X should be quite a bit (approximately 55%) better at anisotropic filtering than the Radeon HD 7870. (explain)

Radeon R9 380X		124160 Mtexels/sec
Radeon HD 7870		80000 Mtexels/sec
	Difference: 44160 (55%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 7870 is a better choice, but only just. (explain)

Radeon HD 7870		32000 Mpixels/sec
Radeon R9 380X		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: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out 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 rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.