GeForce GTX 480 vs Radeon R5 M255

Intro

Compare that to the Radeon R5 M255, which makes use of a 28 nm design. AMD has clocked the core speed at 940 MHz. The DDR3 memory is set to run at a speed of 1000 MHz on this model. It features 320 SPUs along with 20 TAUs and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 480 should theoretically be much faster than the Radeon R5 M255 in general. (explain)

GeForce GTX 480		177408 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 161408 (1009%)

Texel Rate

The GeForce GTX 480 is quite a bit (approximately 123%) faster with regards to AF than the Radeon R5 M255. (explain)

GeForce GTX 480		42000 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 23200 (123%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 480 is the winner, by a large margin. (explain)

GeForce GTX 480		33600 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 26080 (347%)

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 largest amount of data (in units of megabytes per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the 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 number of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.