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GeForce GTX 980 vs Radeon R5 M255

Intro

The GeForce GTX 980 comes with core speeds of 1126 MHz on the GPU, and 1750 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 TAUs and 64 ROPs.

Compare all that to the Radeon R5 M255, which has clock speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 RAM. It features 320 SPUs along with 20 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce GTX 980 should be a lot faster than the Radeon R5 M255 in general. (explain)

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

Texel Rate

The GeForce GTX 980 will be quite a bit (more or less 667%) faster with regards to AF 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 is a lot (about 858%) more effective at anti-aliasing than the Radeon R5 M255, and also will be able to handle higher resolutions without slowing down too much. (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: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be moved past the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the core speed of the card. 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 fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max 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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