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GeForce GTX 1080 vs Radeon R9 M265X

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 RAM. It features 2560 SPUs as well as 160 TAUs and 64 ROPs.

Compare those specifications to the Radeon R9 M265X, which has clock speeds of 575 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 memory. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 1080 should be 355% quicker than the Radeon R9 M265X in general, due to its greater bandwidth. (explain)

GeForce GTX 1080 327680 MB/sec
Radeon R9 M265X 72000 MB/sec
Difference: 255680 (355%)

Texel Rate

The GeForce GTX 1080 should be much (about 1018%) better at anisotropic filtering than the Radeon R9 M265X. (explain)

GeForce GTX 1080 257120 Mtexels/sec
Radeon R9 M265X 23000 Mtexels/sec
Difference: 234120 (1018%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 1080 is a better choice, by a large margin. (explain)

GeForce GTX 1080 102848 Mpixels/sec
Radeon R9 M265X 9200 Mpixels/sec
Difference: 93648 (1018%)

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 R9 M265X

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 R9 M265X
Manufacturer nVidia AMD
Year May 2016 May 1 2014
Code Name GP104-400 Venus Pro
Memory 8192 MB 2048 MB
Core Speed 1607 MHz 575 MHz
Memory Speed 10008 MHz 4500 MHz
Power (Max TDP) 180 watts (Unknown) watts
Bandwidth 327680 MB/sec 72000 MB/sec
Texel Rate 257120 Mtexels/sec 23000 Mtexels/sec
Pixel Rate 102848 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 2560 640
Texture Mapping Units 160 40
Render Output Units 64 16
Bus Type GDDR5X GDDR5
Bus Width 256-bit 128-bit
Fab Process 16 nm 28 nm
Transistors 7200 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
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 information (measured in megabytes per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock 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 processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on lots of other factors, especially 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 1080

Amazon.com

Check prices at:

Radeon R9 M265X

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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