Radeon HD 5970 vs Radeon R9 380 2G

Intro

Compare all of that to the Radeon R9 380 2G, which features a core clock speed of 970 MHz and a GDDR5 memory speed of 1425 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It features 1792 SPUs, 112 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380 2G		190 Watts
Radeon HD 5970		294 Watts
	Difference: 104 Watts (55%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 5970 will be 40% quicker than the Radeon R9 380 2G in general, because of its higher bandwidth. (explain)

Radeon HD 5970		256000 MB/sec
Radeon R9 380 2G		182400 MB/sec
	Difference: 73600 (40%)

Texel Rate

The Radeon HD 5970 should be a lot (approximately 114%) better at AF than the Radeon R9 380 2G. (explain)

Radeon HD 5970		232000 Mtexels/sec
Radeon R9 380 2G		108640 Mtexels/sec
	Difference: 123360 (114%)

Pixel Rate

The Radeon HD 5970 will be a lot (approximately 199%) more effective at full screen anti-aliasing than the Radeon R9 380 2G, and able to handle higher screen resolutions better. (explain)

Radeon HD 5970		92800 Mpixels/sec
Radeon R9 380 2G		31040 Mpixels/sec
	Difference: 61760 (199%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (counted in megabytes per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 amount of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the clock speed of the card. 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 is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.