Radeon HD 6870 vs Radeon R9 380 4G

Intro

Compare all that to the Radeon R9 380 4G, which uses a 28 nm design. AMD has clocked the core frequency at 970 MHz. The GDDR5 RAM runs at a speed of 1425 MHz on this specific model. It features 1792 SPUs along with 112 TAUs 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

As far as performance goes, the Radeon R9 380 4G should theoretically be a lot superior to 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%) 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%) faster with regards to AA than the Radeon HD 6870, and able to handle higher resolutions better. (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 maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once 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, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.