Geforce GTX 680 vs Radeon R9 M385X

Intro

Compare those specifications to the Radeon R9 M385X, which uses a 28 nm design. AMD has clocked the core frequency at 1100 MHz. The GDDR5 memory runs at a frequency of 1500 MHz on this specific model. It features 896 SPUs as well as 56 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Geforce GTX 680 should be a lot faster than the Radeon R9 M385X in general. (explain)

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

Texel Rate

The Geforce GTX 680 should be a lot (more or less 109%) better at texture 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 is quite a bit (more or less 83%) faster with regards to AA than the Radeon R9 M385X, and should be capable of handling higher 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: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's 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 number of texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.