Radeon HD 7870 vs Radeon R9 380 2G

Intro

Compare those specifications to the Radeon R9 380 2G, which has a core clock speed of 970 MHz and a GDDR5 memory speed of 1425 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It is made up of 1792 SPUs, 112 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 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

Performance-wise, the Radeon R9 380 2G should theoretically be a 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 should be much (approximately 36%) faster with regards to 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

The Radeon HD 7870 should be just a bit (approximately 3%) faster with regards to FSAA than the Radeon R9 380 2G, and able to handle higher screen resolutions without slowing down too much. (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: Memory bandwidth is the max amount of data (measured in MB per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is worked out by multiplying the total number of 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 a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.