GeForce GTX 560 Ti 448 vs Radeon R5 M255

Intro

Compare that to the Radeon R5 M255, which comes with a clock speed of 940 MHz and a DDR3 memory frequency of 1000 MHz. It also makes use of a 64-bit bus, and uses a 28 nm design. It is made up of 320 SPUs, 20 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 560 Ti 448, in theory, should be a lot faster than the Radeon R5 M255 in general. (explain)

GeForce GTX 560 Ti 448		144000 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 128000 (800%)

Texel Rate

The GeForce GTX 560 Ti 448 should be a lot (approximately 118%) more effective at texture filtering than the Radeon R5 M255. (explain)

GeForce GTX 560 Ti 448		40992 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 22192 (118%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 560 Ti 448 is superior to the Radeon R5 M255, and very much so. (explain)

GeForce GTX 560 Ti 448		29280 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 21760 (289%)

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

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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 memory bandwidth is, the lower the potential to reach the maximum fill rate.