GeForce 830M vs Radeon HD 6790

Intro

Compare all of that to the Radeon HD 6790, which has clock speeds of 840 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Radeon HD 6790		150 Watts
	Difference: 125 Watts (500%)

Memory Bandwidth

Performance-wise, the Radeon HD 6790 should theoretically be much superior to the GeForce 830M in general. (explain)

Radeon HD 6790		134400 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 120000 (833%)

Texel Rate

The Radeon HD 6790 should be quite a bit (about 104%) better at anisotropic filtering than the GeForce 830M. (explain)

Radeon HD 6790		33600 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 17136 (104%)

Pixel Rate

The Radeon HD 6790 should be quite a bit (more or less 63%) more effective at FSAA than the GeForce 830M, and also able to handle higher screen resolutions better. (explain)

Radeon HD 6790		13440 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 5208 (63%)

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 data (counted in MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the clock 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.