GeForce GTX 480 vs Radeon R5 M255

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 480 should perform a lot faster than the Radeon R5 M255 overall. (explain)

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

Texel Rate

The GeForce GTX 480 is a lot (more or less 123%) faster with regards to anisotropic filtering than the Radeon R5 M255. (explain)

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

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 480 is a better choice, 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: Memory bandwidth is the max amount of data (counted in MB per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high 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 amount of texture units by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.