GeForce GTX 280 vs Radeon R5 M255

Intro

Compare all that to the Radeon R5 M255, which features core clock speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 320 SPUs along with 20 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 280 should theoretically be much faster than the Radeon R5 M255 overall. (explain)

GeForce GTX 280		141696 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 125696 (786%)

Texel Rate

The GeForce GTX 280 will be quite a bit (more or less 156%) faster with regards to texture filtering than the Radeon R5 M255. (explain)

GeForce GTX 280		48160 Mtexels/sec
Radeon R5 M255		18800 Mtexels/sec
	Difference: 29360 (156%)

Pixel Rate

The GeForce GTX 280 should be much (approximately 156%) better at anti-aliasing than the Radeon R5 M255, and also will be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 280		19264 Mpixels/sec
Radeon R5 M255		7520 Mpixels/sec
	Difference: 11744 (156%)

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 max amount of information (measured in MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling 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 graphics card can possibly record to the local memory in one 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 - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.