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GeForce GTX 980M vs Radeon R9 M390X

Intro

The GeForce GTX 980M makes use of a 28 nm design. nVidia has set the core speed at 1038 MHz. The GDDR5 RAM works at a frequency of 1000 MHz on this particular card. It features 1536 SPUs as well as 96 Texture Address Units and 64 Rasterization Operator Units.

Compare all of that to the Radeon R9 M390X, which features clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2048 SPUs as well as 128 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M 100 Watts
Radeon R9 M390X 125 Watts
Difference: 25 Watts (25%)

Memory Bandwidth

The Radeon R9 M390X, in theory, should perform a lot faster than the GeForce GTX 980M in general. (explain)

Radeon R9 M390X 160000 MB/sec
GeForce GTX 980M 128000 MB/sec
Difference: 32000 (25%)

Texel Rate

The GeForce GTX 980M is a bit (about 8%) faster with regards to anisotropic filtering than the Radeon R9 M390X. (explain)

GeForce GTX 980M 99648 Mtexels/sec
Radeon R9 M390X 92544 Mtexels/sec
Difference: 7104 (8%)

Pixel Rate

The GeForce GTX 980M should be much (approximately 187%) more effective at full screen anti-aliasing than the Radeon R9 M390X, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 980M 66432 Mpixels/sec
Radeon R9 M390X 23136 Mpixels/sec
Difference: 43296 (187%)

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 980M

Amazon.com

Check prices at:

Radeon R9 M390X

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 980M Radeon R9 M390X
Manufacturer nVidia AMD
Year October 7 2014 2015
Code Name GM204 Tonga
Memory 4096 MB 4096 MB
Core Speed 1038 MHz 723 MHz
Memory Speed 4000 MHz 5000 MHz
Power (Max TDP) 100 watts 125 watts
Bandwidth 128000 MB/sec 160000 MB/sec
Texel Rate 99648 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 66432 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 1536 2048
Texture Mapping Units 96 128
Render Output Units 64 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-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 12
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be transported across the external memory interface in a second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total texture units by the core clock speed of the chip. The better the texel rate, the better the 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 most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core 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 many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 980M

Amazon.com

Check prices at:

Radeon R9 M390X

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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