Radeon R9 380 2G vs Radeon RX 460 2GB

Intro

Compare those specifications to the Radeon RX 460 2GB, which comes with a core clock frequency of 1090 MHz and a GDDR5 memory speed of 1750 MHz. It also uses a 128-bit memory bus, and makes use of a 14 nm design. It is comprised of 896 SPUs, 56 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 460 2GB		75 Watts
Radeon R9 380 2G		190 Watts
	Difference: 115 Watts (153%)

Memory Bandwidth

Performance-wise, the Radeon R9 380 2G should in theory be quite a bit superior to the Radeon RX 460 2GB overall. (explain)

Radeon R9 380 2G		182400 MB/sec
Radeon RX 460 2GB		112000 MB/sec
	Difference: 70400 (63%)

Texel Rate

The Radeon R9 380 2G will be much (more or less 78%) better at texture filtering than the Radeon RX 460 2GB. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
Radeon RX 460 2GB		61040 Mtexels/sec
	Difference: 47600 (78%)

Pixel Rate

The Radeon R9 380 2G is much (more or less 78%) more effective at AA than the Radeon RX 460 2GB, and will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
Radeon RX 460 2GB		17440 Mpixels/sec
	Difference: 13600 (78%)

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 largest amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.