Geforce GTX 680 vs Radeon R9 M270X

Intro

Compare all of that to the Radeon R9 M270X, which has GPU clock speed of 725 MHz, and 2048 MB of GDDR5 RAM set to run at 1125 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Geforce GTX 680 should theoretically be quite a bit superior to the Radeon R9 M270X in general. (explain)

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

Texel Rate

The Geforce GTX 680 is a lot (more or less 344%) faster with regards to AF than the Radeon R9 M270X. (explain)

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

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Geforce GTX 680 is a better choice, by far. (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: Bandwidth is the maximum amount of information (measured in MB per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The better 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 one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can 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 colour ROPs 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 output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.