Geforce GTX 680 vs Radeon R9 M385X

Intro

Compare all that to the Radeon R9 M385X, which features a core clock speed of 1100 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It features 896 SPUs, 56 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Geforce GTX 680 is 100% quicker than the Radeon R9 M385X in general, due to its greater data rate. (explain)

Geforce GTX 680		192256 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 96256 (100%)

Texel Rate

The Geforce GTX 680 is quite a bit (approximately 109%) better at anisotropic filtering than the Radeon R9 M385X. (explain)

Geforce GTX 680		128768 Mtexels/sec
Radeon R9 M385X		61600 Mtexels/sec
	Difference: 67168 (109%)

Pixel Rate

The Geforce GTX 680 should be much (more or less 83%) better at anti-aliasing than the Radeon R9 M385X, and also will be capable of handling higher screen resolutions better. (explain)

Geforce GTX 680		32192 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 14592 (83%)

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 information (measured in MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per 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 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 maximum amount of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the core speed of the card. 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.