Geforce GTX 680 vs Radeon R9 M380

Intro

Compare all of that to the Radeon R9 M380, which comes with core clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 RAM. It features 640 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Geforce GTX 680 should be 100% quicker than the Radeon R9 M380 in general, due to its greater bandwidth. (explain)

Geforce GTX 680		192256 MB/sec
Radeon R9 M380		96000 MB/sec
	Difference: 96256 (100%)

Texel Rate

The Geforce GTX 680 will be quite a bit (approximately 222%) more effective at texture filtering than the Radeon R9 M380. (explain)

Geforce GTX 680		128768 Mtexels/sec
Radeon R9 M380		40000 Mtexels/sec
	Difference: 88768 (222%)

Pixel Rate

If using a high resolution is important to you, then the Geforce GTX 680 is superior to the Radeon R9 M380, and very much so. (explain)

Geforce GTX 680		32192 Mpixels/sec
Radeon R9 M380		16000 Mpixels/sec
	Difference: 16192 (101%)

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 largest amount of information (counted in MB per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

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