GeForce 830M vs Radeon R9 280

Intro

Compare all of that to the Radeon R9 280, which comes with clock speeds of 933 MHz on the GPU, and 1250 MHz on the 3072 MB of GDDR5 RAM. It features 1792 SPUs as well as 112 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Radeon R9 280		250 Watts
	Difference: 225 Watts (900%)

Memory Bandwidth

Performance-wise, the Radeon R9 280 should in theory be a lot better than the GeForce 830M overall. (explain)

Radeon R9 280		240000 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 225600 (1567%)

Texel Rate

The Radeon R9 280 should be quite a bit (approximately 535%) more effective at texture filtering than the GeForce 830M. (explain)

Radeon R9 280		104496 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 88032 (535%)

Pixel Rate

The Radeon R9 280 will be much (approximately 263%) better at FSAA than the GeForce 830M, and also able to handle higher screen resolutions more effectively. (explain)

Radeon R9 280		29856 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 21624 (263%)

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 (counted in MB per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the 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 most pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.