Radeon HD 6870 vs Radeon R9 380 4G

Intro

Compare that to the Radeon R9 380 4G, which features clock speeds of 970 MHz on the GPU, and 1425 MHz on the 4096 MB of GDDR5 RAM. It features 1792 SPUs along with 112 Texture Address Units 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 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 should in theory be quite a bit faster than the Radeon HD 6870 overall. (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 (about 116%) faster with regards to 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 is a bit (approximately 8%) faster with regards to FSAA than the Radeon HD 6870, and should be capable of handling higher screen resolutions more effectively. (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: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transferred across the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.