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GeForce GTX 980 vs Radeon R5 M255

Intro

The GeForce GTX 980 uses a 28 nm design. nVidia has clocked the core frequency at 1126 MHz. The GDDR5 RAM works at a speed of 1750 MHz on this model. It features 2048 SPUs as well as 128 Texture Address Units and 64 Rasterization Operator Units.

Compare all of that to the Radeon R5 M255, which makes use of a 28 nm design. AMD has set the core speed at 940 MHz. The DDR3 RAM works at a frequency of 1000 MHz on this particular card. It features 320 SPUs as well as 20 TAUs and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce GTX 980 should theoretically be much better than the Radeon R5 M255 overall. (explain)

GeForce GTX 980 224000 MB/sec
Radeon R5 M255 16000 MB/sec
Difference: 208000 (1300%)

Texel Rate

The GeForce GTX 980 should be a lot (more or less 667%) better at texture filtering than the Radeon R5 M255. (explain)

GeForce GTX 980 144128 Mtexels/sec
Radeon R5 M255 18800 Mtexels/sec
Difference: 125328 (667%)

Pixel Rate

The GeForce GTX 980 should be much (more or less 858%) faster with regards to FSAA than the Radeon R5 M255, and also able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 980 72064 Mpixels/sec
Radeon R5 M255 7520 Mpixels/sec
Difference: 64544 (858%)

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 980

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 980 Radeon R5 M255
Manufacturer nVidia AMD
Year September 2014 June 2014
Code Name GM204-400 Jet Pro
Memory 4096 MB 2048 MB
Core Speed 1126 MHz 940 MHz
Memory Speed 7000 MHz 2000 MHz
Power (Max TDP) 165 watts (Unknown) watts
Bandwidth 224000 MB/sec 16000 MB/sec
Texel Rate 144128 Mtexels/sec 18800 Mtexels/sec
Pixel Rate 72064 Mpixels/sec 7520 Mpixels/sec
Unified Shaders 2048 320
Texture Mapping Units 128 20
Render Output Units 64 8
Bus Type GDDR5 DDR3
Bus Width 256-bit 64-bit
Fab Process 28 nm 28 nm
Transistors 5200 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x8
DirectX Version DirectX 11.2 DirectX 11.2
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of data (measured in MB per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video 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 most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated 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 outputting the pixels (image) to the screen. 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 reach the maximum fill rate.

Display Prices

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GeForce GTX 980

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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