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GeForce GTX 980M vs Radeon R9 M395X

Intro

The GeForce GTX 980M features a clock frequency of 1038 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It features 1536 SPUs, 96 TAUs, and 64 ROPs.

Compare those specs to the Radeon R9 M395X, which uses a 28 nm design. AMD has set the core speed at 723 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this particular model. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M 100 Watts
Radeon R9 M395X 125 Watts
Difference: 25 Watts (25%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M395X should be 25% quicker than the GeForce GTX 980M overall, because of its greater data rate. (explain)

Radeon R9 M395X 160000 MB/sec
GeForce GTX 980M 128000 MB/sec
Difference: 32000 (25%)

Texel Rate

The GeForce GTX 980M should be a small bit (about 8%) faster with regards to texture filtering than the Radeon R9 M395X. (explain)

GeForce GTX 980M 99648 Mtexels/sec
Radeon R9 M395X 92544 Mtexels/sec
Difference: 7104 (8%)

Pixel Rate

The GeForce GTX 980M is a lot (about 187%) more effective at anti-aliasing than the Radeon R9 M395X, and capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 980M 66432 Mpixels/sec
Radeon R9 M395X 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

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Radeon R9 M395X

Amazon.com

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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 M395X
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: Memory bandwidth is the largest amount of information (measured in megabytes per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the 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 number of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 980M

Amazon.com

Check prices at:

Radeon R9 M395X

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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