Geforce GTX 680 vs Radeon R9 M270X

Intro

Compare all of that to the Radeon R9 M270X, which uses a 28 nm design. AMD has set the core frequency at 725 MHz. The GDDR5 memory works at a speed of 1125 MHz on this card. It features 640 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Geforce GTX 680 should in theory be a lot better than the Radeon R9 M270X overall. (explain)

Geforce GTX 680		192256 MB/sec
Radeon R9 M270X		72000 MB/sec
	Difference: 120256 (167%)

Texel Rate

The Geforce GTX 680 should be much (about 344%) more effective at AF than the Radeon R9 M270X. (explain)

Geforce GTX 680		128768 Mtexels/sec
Radeon R9 M270X		29000 Mtexels/sec
	Difference: 99768 (344%)

Pixel Rate

The Geforce GTX 680 will be a lot (more or less 178%) faster with regards to AA than the Radeon R9 M270X, and should be able to handle higher screen resolutions without losing too much performance. (explain)

Geforce GTX 680		32192 Mpixels/sec
Radeon R9 M270X		11600 Mpixels/sec
	Difference: 20592 (178%)

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 transported over the external memory interface within a second. It's worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 are processed per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.