GeForce GTX 980 vs Radeon R9 M380

Intro

Compare those specs to the Radeon R9 M380, which comes with GPU core speed of 1000 MHz, and 4096 MB of GDDR5 memory set to run at 1500 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 980 should theoretically be a lot faster than the Radeon R9 M380 in general. (explain)

GeForce GTX 980		224000 MB/sec
Radeon R9 M380		96000 MB/sec
	Difference: 128000 (133%)

Texel Rate

The GeForce GTX 980 is much (about 260%) faster with regards to texture filtering than the Radeon R9 M380. (explain)

GeForce GTX 980		144128 Mtexels/sec
Radeon R9 M380		40000 Mtexels/sec
	Difference: 104128 (260%)

Pixel Rate

The GeForce GTX 980 should be quite a bit (about 350%) more effective at anti-aliasing than the Radeon R9 M380, and should be capable of handling higher resolutions better. (explain)

GeForce GTX 980		72064 Mpixels/sec
Radeon R9 M380		16000 Mpixels/sec
	Difference: 56064 (350%)

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 information (counted in megabytes per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the 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 texture map elements (texels) that can be processed per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the 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 maximum number of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on 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 maximum fill rate.