Geforce GTX 680 vs Radeon R9 M380

Intro

Compare those specifications to the Radeon R9 M380, which has a clock speed of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Geforce GTX 680 should theoretically perform much faster than the Radeon R9 M380 in general. (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 (about 222%) faster with regards to AF than the Radeon R9 M380. (explain)

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

Pixel Rate

The Geforce GTX 680 will be quite a bit (about 101%) better at FSAA than the Radeon R9 M380, and also able to handle higher resolutions better. (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: Bandwidth is the max amount of data (measured in megabytes per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.