GeForce GTX Titan vs Radeon R9 M270X

Intro

Compare those specifications to the Radeon R9 M270X, which uses a 28 nm design. AMD has clocked the core frequency at 725 MHz. The GDDR5 memory runs at a speed of 1125 MHz on this model. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX Titan should theoretically be a lot faster than the Radeon R9 M270X in general. (explain)

GeForce GTX Titan		288384 MB/sec
Radeon R9 M270X		72000 MB/sec
	Difference: 216384 (301%)

Texel Rate

The GeForce GTX Titan is quite a bit (approximately 547%) faster with regards to texture filtering than the Radeon R9 M270X. (explain)

GeForce GTX Titan		187488 Mtexels/sec
Radeon R9 M270X		29000 Mtexels/sec
	Difference: 158488 (547%)

Pixel Rate

The GeForce GTX Titan is quite a bit (about 246%) more effective at anti-aliasing than the Radeon R9 M270X, and also capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX Titan		40176 Mpixels/sec
Radeon R9 M270X		11600 Mpixels/sec
	Difference: 28576 (246%)

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 data (measured in megabytes per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number 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 outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.