GeForce 830M vs Radeon R9 390 8G

Intro

Compare all of that to the Radeon R9 390 8G, which has a core clock speed of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 512-bit bus, and uses a 28 nm design. It is made up of 2560 SPUs, 160 TAUs, and 64 Raster Operation 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

In theory, the Radeon R9 390 8G should perform quite a bit 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 will be a lot (more or less 872%) faster with regards to anisotropic filtering than the GeForce 830M. (explain)

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

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 390 8G is superior to the GeForce 830M, and very much so. (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 largest amount of data (counted in MB per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the video 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 maximum amount of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.