GeForce 830M vs Radeon HD 6770

Intro

Compare those specifications to the Radeon HD 6770, which features GPU core speed of 900 MHz, and 512 MB of GDDR5 memory running at 1050 MHz through a 128-bit bus. It also is comprised of 800 Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 830M		25 Watts
Radeon HD 6770		108 Watts
	Difference: 83 Watts (332%)

Memory Bandwidth

In theory, the Radeon HD 6770 will be 367% quicker than the GeForce 830M in general, due to its higher data rate. (explain)

Radeon HD 6770		67200 MB/sec
GeForce 830M		14400 MB/sec
	Difference: 52800 (367%)

Texel Rate

The Radeon HD 6770 will be a lot (approximately 119%) more effective at texture filtering than the GeForce 830M. (explain)

Radeon HD 6770		36000 Mtexels/sec
GeForce 830M		16464 Mtexels/sec
	Difference: 19536 (119%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6770 is superior to the GeForce 830M, by a large margin. (explain)

Radeon HD 6770		14400 Mpixels/sec
GeForce 830M		8232 Mpixels/sec
	Difference: 6168 (75%)

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 information (counted in MB per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the 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 most pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.