GeForce GTX 860M vs Radeon HD 6770 1GB

Intro

Compare that to the Radeon HD 6770 1GB, which uses a 40 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 memory runs at a speed of 1050 MHz on this model. It features 800 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M		45 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 63 Watts (140%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6770 1GB is 5% faster than the GeForce GTX 860M overall, due to its greater data rate. (explain)

Radeon HD 6770 1GB		67200 MB/sec
GeForce GTX 860M		64000 MB/sec
	Difference: 3200 (5%)

Texel Rate

The GeForce GTX 860M will be a lot (about 113%) better at anisotropic filtering than the Radeon HD 6770 1GB. (explain)

GeForce GTX 860M		76512 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 40512 (113%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6770 1GB is a better choice, though not by far. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce GTX 860M		12752 Mpixels/sec
	Difference: 1648 (13%)

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 (measured in MB per second) that can be transported past 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. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better 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 most pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.