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GeForce GTX 860M vs Radeon R9 M385X

Intro

The GeForce GTX 860M features a GPU clock speed of 797 MHz, and the 4096 MB of GDDR5 RAM runs at 1000 MHz through a 128-bit bus. It also features 1152 SPUs, 96 TAUs, and 16 Raster Operation Units.

Compare that to the Radeon R9 M385X, which comes with a clock frequency of 1100 MHz and a GDDR5 memory frequency of 1500 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It features 896 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R9 M385X should theoretically be a lot better than the GeForce GTX 860M overall. (explain)

Radeon R9 M385X 96000 MB/sec
GeForce GTX 860M 64000 MB/sec
Difference: 32000 (50%)

Texel Rate

The GeForce GTX 860M should be quite a bit (approximately 24%) faster with regards to anisotropic filtering than the Radeon R9 M385X. (explain)

GeForce GTX 860M 76512 Mtexels/sec
Radeon R9 M385X 61600 Mtexels/sec
Difference: 14912 (24%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 M385X is a better choice, by far. (explain)

Radeon R9 M385X 17600 Mpixels/sec
GeForce GTX 860M 12752 Mpixels/sec
Difference: 4848 (38%)

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 860M

Amazon.com

Check prices at:

Radeon R9 M385X

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 860M Radeon R9 M385X
Manufacturer nVidia AMD
Year March 12 2014 2015
Code Name GM107 Bonaire
Memory 4096 MB 4096 MB
Core Speed 797 MHz 1100 MHz
Memory Speed 4000 MHz 6000 MHz
Power (Max TDP) 45 watts (Unknown) watts
Bandwidth 64000 MB/sec 96000 MB/sec
Texel Rate 76512 Mtexels/sec 61600 Mtexels/sec
Pixel Rate 12752 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 1152 896
Texture Mapping Units 96 56
Render Output Units 16 16
Bus Type GDDR5 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: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the card will be at 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 could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce GTX 860M

Amazon.com

Check prices at:

Radeon R9 M385X

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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