GeForce 830M vs Radeon R9 390 8G

Intro

Compare those specs to the Radeon R9 390 8G, which makes use of a 28 nm design. AMD has set the core speed at 1000 MHz. The GDDR5 memory works at a frequency of 1500 MHz on this specific model. It features 2560 SPUs as well as 160 TAUs and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Radeon R9 390 8G		275 Watts
	Difference: 250 Watts (1000%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390 8G should perform much faster than the GeForce 830M in general. (explain)

Radeon R9 390 8G		384000 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 369600 (2567%)

Texel Rate

The Radeon R9 390 8G should be much (approximately 872%) more effective at texture filtering than the GeForce 830M. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 143536 (872%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 390 8G is the winner, by far. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 55768 (677%)

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 maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If 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 are processed in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

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