Radeon HD 6870 vs Radeon R9 380 4G

Intro

Compare all of that to the Radeon R9 380 4G, which features GPU clock speed of 970 MHz, and 4096 MB of GDDR5 memory running at 1425 MHz through a 256-bit bus. It also is made up of 1792 SPUs, 112 TAUs, 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

The Radeon R9 380 4G, in theory, 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 is quite a bit (more or less 116%) more effective at anisotropic filtering 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 will be just a bit (about 8%) faster with regards to anti-aliasing than the Radeon HD 6870, and also capable of handling higher resolutions without losing too much performance. (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 (counted in MB per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it 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, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.