Radeon HD 7870 vs Radeon R9 380X

Intro

Compare those specifications to the Radeon R9 380X, which comes with a core clock frequency of 970 MHz and a GDDR5 memory speed of 1425 MHz. It also makes use of a 256-bit memory bus, and uses a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

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

The Radeon R9 380X should theoretically be a 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 will be a lot (about 55%) more effective at AF than the Radeon HD 7870. (explain)

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

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7870 is the winner, but it probably won't make a huge difference. (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: Bandwidth is the max amount of information (counted in MB per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 amount of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can 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 Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.