GeForce 830M vs Radeon R9 390 8G

Intro

Compare that to the Radeon R9 390 8G, which uses a 28 nm design. AMD has set the core frequency at 1000 MHz. The GDDR5 memory works at a speed of 1500 MHz on this card. It features 2560 SPUs along with 160 Texture Address Units and 64 Rasterization Operator Units.

Display Graphs

Hide Graphs

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

The Radeon R9 390 8G, in theory, should be quite a bit faster than the GeForce 830M overall. (explain)

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

Texel Rate

The Radeon R9 390 8G is much (approximately 872%) better at anisotropic filtering than the GeForce 830M. (explain)

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

Pixel Rate

The Radeon R9 390 8G should be quite a bit (approximately 677%) more effective at AA than the GeForce 830M, and capable of handling higher screen resolutions better. (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: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka 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 bandwidth is, the lower the ability to get to the maximum fill rate.