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GeForce GTX 860M vs Radeon R9 M275X

Intro

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

Compare those specifications to the Radeon R9 M275X, which comes with a core clock speed of 900 MHz and a GDDR5 memory speed of 1125 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It features 640 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M 45 Watts
Radeon R9 M275X 50 Watts
Difference: 5 Watts (11%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M275X should perform just a bit faster than the GeForce GTX 860M in general. (explain)

Radeon R9 M275X 72000 MB/sec
GeForce GTX 860M 64000 MB/sec
Difference: 8000 (13%)

Texel Rate

The GeForce GTX 860M is much (approximately 113%) better at AF than the Radeon R9 M275X. (explain)

GeForce GTX 860M 76512 Mtexels/sec
Radeon R9 M275X 36000 Mtexels/sec
Difference: 40512 (113%)

Pixel Rate

The Radeon R9 M275X will be a bit (about 13%) faster with regards to full screen anti-aliasing than the GeForce GTX 860M, and will be able to handle higher screen resolutions more effectively. (explain)

Radeon R9 M275X 14400 Mpixels/sec
GeForce GTX 860M 12752 Mpixels/sec
Difference: 1648 (13%)

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 M275X

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 M275X
Manufacturer nVidia AMD
Year March 12 2014 May 1 2014
Code Name GM107 Venus XTX
Memory 4096 MB 2048 MB
Core Speed 797 MHz 900 MHz
Memory Speed 4000 MHz 4500 MHz
Power (Max TDP) 45 watts 50 watts
Bandwidth 64000 MB/sec 72000 MB/sec
Texel Rate 76512 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 12752 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 1152 640
Texture Mapping Units 96 40
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 11.2
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 amount of texture map elements (texels) that are applied in one second. This number is worked out 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 graphics 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 maximum amount of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 860M

Amazon.com

Check prices at:

Radeon R9 M275X

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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