GeForce 830M vs Radeon HD 6970

Intro

Compare those specifications to the Radeon HD 6970, which has a clock speed of 880 MHz and a GDDR5 memory speed of 1375 MHz. It also features a 256-bit bus, and makes use of a 40 nm design. It is made up of 1536 SPUs, 96 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Radeon HD 6970		250 Watts
	Difference: 225 Watts (900%)

Memory Bandwidth

Performance-wise, the Radeon HD 6970 should in theory be quite a bit better than the GeForce 830M in general. (explain)

Radeon HD 6970		176000 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 161600 (1122%)

Texel Rate

The Radeon HD 6970 is much (about 413%) faster with regards to anisotropic filtering than the GeForce 830M. (explain)

Radeon HD 6970		84480 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 68016 (413%)

Pixel Rate

The Radeon HD 6970 will be much (more or less 242%) faster with regards to anti-aliasing than the GeForce 830M, and also able to handle higher resolutions while still performing well. (explain)

Radeon HD 6970		28160 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 19928 (242%)

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 information (counted in MB per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in one 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 drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.