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GeForce GTX 860M vs Radeon R9 M385X

Intro

The GeForce GTX 860M uses a 28 nm design. nVidia has clocked the core frequency at 797 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this model. It features 1152 SPUs along with 96 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon R9 M385X, which features clock speeds of 1100 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 memory. It features 896 SPUs along with 56 Texture Address Units and 16 Rasterization Operator 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 much 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 is much (approximately 24%) more effective at texture 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 running with high levels of AA is important to you, then the Radeon R9 M385X is the winner, by a large margin. (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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 are processed in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the 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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