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GeForce GTX 1080 vs Radeon R5 M255

Intro

The GeForce GTX 1080 comes with core clock speeds of 1607 MHz on the GPU, and 1251 MHz on the 8192 MB of GDDR5X memory. It features 2560 SPUs along with 160 TAUs and 64 ROPs.

Compare that to the Radeon R5 M255, which uses a 28 nm design. AMD has clocked the core frequency at 940 MHz. The DDR3 RAM works at a frequency of 1000 MHz on this particular card. It features 320 SPUs along with 20 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 1080 should theoretically perform a lot faster than the Radeon R5 M255 overall. (explain)

GeForce GTX 1080 327680 MB/sec
Radeon R5 M255 16000 MB/sec
Difference: 311680 (1948%)

Texel Rate

The GeForce GTX 1080 should be a lot (approximately 1268%) faster with regards to anisotropic filtering than the Radeon R5 M255. (explain)

GeForce GTX 1080 257120 Mtexels/sec
Radeon R5 M255 18800 Mtexels/sec
Difference: 238320 (1268%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 1080 is superior to the Radeon R5 M255, and very much so. (explain)

GeForce GTX 1080 102848 Mpixels/sec
Radeon R5 M255 7520 Mpixels/sec
Difference: 95328 (1268%)

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 1080

Amazon.com

Check prices at:

Radeon R5 M255

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 1080 Radeon R5 M255
Manufacturer nVidia AMD
Year May 2016 June 2014
Code Name GP104-400 Jet Pro
Memory 8192 MB 2048 MB
Core Speed 1607 MHz 940 MHz
Memory Speed 10008 MHz 2000 MHz
Power (Max TDP) 180 watts (Unknown) watts
Bandwidth 327680 MB/sec 16000 MB/sec
Texel Rate 257120 Mtexels/sec 18800 Mtexels/sec
Pixel Rate 102848 Mpixels/sec 7520 Mpixels/sec
Unified Shaders 2560 320
Texture Mapping Units 160 20
Render Output Units 64 8
Bus Type GDDR5X DDR3
Bus Width 256-bit 64-bit
Fab Process 16 nm 28 nm
Transistors 7200 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x8
DirectX Version DirectX 12.0 DirectX 11.2
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 number of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the graphics 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 maximum amount of pixels that the graphics card can possibly record to the 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 the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 1080

Amazon.com

Check prices at:

Radeon R5 M255

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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