GeForce GTX 850M vs Radeon HD 6770

Intro

Compare that to the Radeon HD 6770, which has GPU core speed of 900 MHz, and 512 MB of GDDR5 RAM set to run at 1050 MHz through a 128-bit bus. It also features 800 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 850M		3340 points
Radeon HD 6770		1520 points
	Difference: 1820 (120%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

The Radeon HD 6770 should in theory be a lot faster than the GeForce GTX 850M in general. (explain)

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

Texel Rate

The Radeon HD 6770 should be a small bit (about 3%) more effective at AF than the GeForce GTX 850M. (explain)

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

Pixel Rate

The Radeon HD 6770 should be a little bit (approximately 3%) more effective at anti-aliasing than the GeForce GTX 850M, and also will be capable of handling higher screen resolutions better. (explain)

Radeon HD 6770		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: Bandwidth is the max amount of data (counted in MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 number of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. 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 rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.