Radeon HD 6870 vs Radeon R9 380 4G

Intro

Compare that to the Radeon R9 380 4G, which makes use of a 28 nm design. AMD has clocked the core frequency at 970 MHz. The GDDR5 RAM works at a speed of 1425 MHz on this particular model. It features 1792 SPUs as well as 112 Texture Address Units 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 6870		2870 points
	Difference: 5967 (208%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6870		151 Watts
Radeon R9 380 4G		190 Watts
	Difference: 39 Watts (26%)

Memory Bandwidth

Theoretically, the Radeon R9 380 4G should perform much faster than the Radeon HD 6870 in general. (explain)

Radeon R9 380 4G		182400 MB/sec
Radeon HD 6870		134400 MB/sec
	Difference: 48000 (36%)

Texel Rate

The Radeon R9 380 4G should be quite a bit (more or less 116%) more effective at AF than the Radeon HD 6870. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
Radeon HD 6870		50400 Mtexels/sec
	Difference: 58240 (116%)

Pixel Rate

The Radeon R9 380 4G should be a little bit (about 8%) more effective at FSAA than the Radeon HD 6870, and should be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
Radeon HD 6870		28800 Mpixels/sec
	Difference: 2240 (8%)

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 maximum amount of information (in units of MB per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video 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 maximum number of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the card's clock speed. 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 quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.