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GeForce GTX 850M vs Radeon HD 6850

Intro

The GeForce GTX 850M makes use of a 28 nm design. nVidia has clocked the core speed at 876 MHz. The DDR3 RAM runs at a speed of 1000 MHz on this particular model. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6850, which comes with GPU clock speed of 775 MHz, and 1024 MB of GDDR5 RAM set to run at 1000 MHz through a 256-bit bus. It also is made up of 960 SPUs, 48 TAUs, and 32 ROPs.

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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 6850 2395 points
Difference: 945 (39%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M 40 Watts
Radeon HD 6850 127 Watts
Difference: 87 Watts (218%)

Memory Bandwidth

In theory, the Radeon HD 6850 should be much faster than the GeForce GTX 850M overall. (explain)

Radeon HD 6850 128000 MB/sec
GeForce GTX 850M 32000 MB/sec
Difference: 96000 (300%)

Texel Rate

The Radeon HD 6850 is just a bit (more or less 6%) better at texture filtering than the GeForce GTX 850M. (explain)

Radeon HD 6850 37200 Mtexels/sec
GeForce GTX 850M 35040 Mtexels/sec
Difference: 2160 (6%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6850 is the winner, by a large margin. (explain)

Radeon HD 6850 24800 Mpixels/sec
GeForce GTX 850M 14016 Mpixels/sec
Difference: 10784 (77%)

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

Check prices at:

Radeon HD 6850

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 6850
Manufacturer nVidia AMD
Year March 12 2014 October 2010
Code Name GM107 Barts Pro
Memory 2048 MB 1024 MB
Core Speed 876 MHz 775 MHz
Memory Speed 2000 MHz 4000 MHz
Power (Max TDP) 40 watts 127 watts
Bandwidth 32000 MB/sec 128000 MB/sec
Texel Rate 35040 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 14016 Mpixels/sec 24800 Mpixels/sec
Unified Shaders 640 960
Texture Mapping Units 40 48
Render Output Units 16 32
Bus Type DDR3 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 40 nm
Transistors (Unknown) million 1700 million
Bus PCIe 3.0 x16 PCIe x16
DirectX Version DirectX 12 DirectX 11
OpenGL Version OpenGL 4.5 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce GTX 850M

Amazon.com

Check prices at:

Radeon HD 6850

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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