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GeForce GTX 880M vs Radeon R9 M395X

Intro

The GeForce GTX 880M makes use of a 28 nm design. nVidia has clocked the core frequency at 954 MHz. The GDDR5 RAM is set to run at a speed of 1000 MHz on this specific model. It features 1536 SPUs along with 128 TAUs and 32 ROPs.

Compare all that to the Radeon R9 M395X, which makes use of a 28 nm design. AMD has set the core speed at 723 MHz. The GDDR5 memory runs at a frequency of 1250 MHz on this card. It features 2048 SPUs as well as 128 TAUs and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X 125 Watts
GeForce GTX 880M 130 Watts
Difference: 5 Watts (4%)

Memory Bandwidth

In theory, the Radeon R9 M395X will be 25% quicker than the GeForce GTX 880M in general, because of its greater data rate. (explain)

Radeon R9 M395X 160000 MB/sec
GeForce GTX 880M 128000 MB/sec
Difference: 32000 (25%)

Texel Rate

The GeForce GTX 880M should be a lot (more or less 32%) better at texture filtering than the Radeon R9 M395X. (explain)

GeForce GTX 880M 122112 Mtexels/sec
Radeon R9 M395X 92544 Mtexels/sec
Difference: 29568 (32%)

Pixel Rate

The GeForce GTX 880M will be much (about 32%) faster with regards to FSAA than the Radeon R9 M395X, and should be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 880M 30528 Mpixels/sec
Radeon R9 M395X 23136 Mpixels/sec
Difference: 7392 (32%)

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 880M

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 880M Radeon R9 M395X
Manufacturer nVidia AMD
Year March 12 2014 2015
Code Name GK104 Tonga
Memory 4096 MB 4096 MB
Core Speed 954 MHz 723 MHz
Memory Speed 4000 MHz 5000 MHz
Power (Max TDP) 130 watts 125 watts
Bandwidth 128000 MB/sec 160000 MB/sec
Texel Rate 122112 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 30528 Mpixels/sec 23136 Mpixels/sec
Unified Shaders 1536 2048
Texture Mapping Units 128 128
Render Output Units 32 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 max amount of data (measured in megabytes per second) that can be transported past the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GTX 880M

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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