GeForce 830M vs Radeon HD 6950 2GB

Intro

Compare those specs to the Radeon HD 6950 2GB, which features GPU core speed of 800 MHz, and 2048 MB of GDDR5 memory set to run at 1250 MHz through a 256-bit bus. It also is comprised of 1408 Stream Processors, 88 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 6950 2GB		200 Watts
	Difference: 175 Watts (700%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6950 2GB will be 1011% quicker than the GeForce 830M in general, because of its greater bandwidth. (explain)

Radeon HD 6950 2GB		160000 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 145600 (1011%)

Texel Rate

The Radeon HD 6950 2GB is quite a bit (more or less 328%) more effective at texture filtering than the GeForce 830M. (explain)

Radeon HD 6950 2GB		70400 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 53936 (328%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6950 2GB is a better choice, by far. (explain)

Radeon HD 6950 2GB		25600 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 17368 (211%)

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 (counted in megabytes per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling 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 that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.