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GeForce GTX 850M vs Radeon HD 6770 1GB

Intro

The GeForce GTX 850M features a core clock speed of 876 MHz and a DDR3 memory speed of 1000 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 ROPs.

Compare those specs to the Radeon HD 6770 1GB, which has core speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs along with 40 Texture Address Units and 16 ROPs.

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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

The Radeon HD 6770 1GB, in theory, should perform quite a bit 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 is just 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 is a bit (about 3%) faster with regards to FSAA than the GeForce GTX 850M, and also able to handle higher screen resolutions without losing too much performance. (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

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GeForce GTX 850M

Amazon.com

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Radeon HD 6770 1GB

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GTX 850M Radeon HD 6770 1GB
Manufacturer nVidia AMD
Year March 12 2014 January 2011
Code Name GM107 Juniper XT
Memory 2048 MB 1024 MB
Core Speed 876 MHz 900 MHz
Memory Speed 2000 MHz 4200 MHz
Power (Max TDP) 40 watts 108 watts
Bandwidth 32000 MB/sec 67200 MB/sec
Texel Rate 35040 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 14016 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 640 800
Texture Mapping Units 40 40
Render Output Units 16 16
Bus Type DDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 28 nm 40 nm
Transistors (Unknown) million 1040 million
Bus PCIe 3.0 x16 PCIe x16
DirectX Version DirectX 12 DirectX 11
OpenGL Version OpenGL 4.5 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total amount of texture units of the card by the core 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 processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 850M

Amazon.com

Check prices at:

Radeon HD 6770 1GB

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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