GeForce GTX 1080 vs Radeon R9 M380

Intro

Compare all of that to the Radeon R9 M380, which comes with a clock frequency of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 1080 is 241% quicker than the Radeon R9 M380 overall, due to its higher bandwidth. (explain)

GeForce GTX 1080		327680 MB/sec
Radeon R9 M380		96000 MB/sec
	Difference: 231680 (241%)

Texel Rate

The GeForce GTX 1080 should be a lot (approximately 543%) more effective at AF than the Radeon R9 M380. (explain)

GeForce GTX 1080		257120 Mtexels/sec
Radeon R9 M380		40000 Mtexels/sec
	Difference: 217120 (543%)

Pixel Rate

The GeForce GTX 1080 should be much (approximately 543%) more effective at AA than the Radeon R9 M380, and also should be able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 1080		102848 Mpixels/sec
Radeon R9 M380		16000 Mpixels/sec
	Difference: 86848 (543%)

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 max amount of data (counted in MB per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total number of texture units by the core 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines 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 output rate is also dependant on lots of 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.