GeForce GTX 850M vs Radeon HD 6770 1GB

Intro

Compare all of that to the Radeon HD 6770 1GB, which comes with clock speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 800 SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 68 Watts (170%)

Memory Bandwidth

In theory, the Radeon HD 6770 1GB should be a lot faster than the GeForce GTX 850M overall. (explain)

Radeon HD 6770 1GB		67200 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 35200 (110%)

Texel Rate

The Radeon HD 6770 1GB should be a bit (about 3%) faster with regards to AF than the GeForce GTX 850M. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce GTX 850M		35040 Mtexels/sec
	Difference: 960 (3%)

Pixel Rate

The Radeon HD 6770 1GB will be just a bit (approximately 3%) faster with regards to FSAA than the GeForce GTX 850M, and also will be able to handle higher screen resolutions better. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce GTX 850M		14016 Mpixels/sec
	Difference: 384 (3%)

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 max amount of information (in units of megabytes per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better 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 texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.