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GeForce GTX 850M vs Radeon R9 M380

Intro

The GeForce GTX 850M features core clock speeds of 876 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Compare that to the Radeon R9 M380, which features a core clock frequency of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M380 should be 200% faster than the GeForce GTX 850M in general, because of its greater bandwidth. (explain)

Radeon R9 M380 96000 MB/sec
GeForce GTX 850M 32000 MB/sec
Difference: 64000 (200%)

Texel Rate

The Radeon R9 M380 will be a little bit (more or less 14%) better at AF than the GeForce GTX 850M. (explain)

Radeon R9 M380 40000 Mtexels/sec
GeForce GTX 850M 35040 Mtexels/sec
Difference: 4960 (14%)

Pixel Rate

The Radeon R9 M380 is a small bit (more or less 14%) more effective at AA than the GeForce GTX 850M, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R9 M380 16000 Mpixels/sec
GeForce GTX 850M 14016 Mpixels/sec
Difference: 1984 (14%)

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 R9 M380

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 R9 M380
Manufacturer nVidia AMD
Year March 12 2014 2015
Code Name GM107 Cape Verde
Memory 2048 MB 4096 MB
Core Speed 876 MHz 1000 MHz
Memory Speed 2000 MHz 6000 MHz
Power (Max TDP) 40 watts (Unknown) watts
Bandwidth 32000 MB/sec 96000 MB/sec
Texel Rate 35040 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 14016 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 640 640
Texture Mapping Units 40 40
Render Output Units 16 16
Bus Type DDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total number of texture units 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 applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 850M

Amazon.com

Check prices at:

Radeon R9 M380

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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