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GeForce GTX 880M vs Radeon R9 M390X

Intro

The GeForce GTX 880M has a GPU clock speed of 954 MHz, and the 4096 MB of GDDR5 RAM runs at 1000 MHz through a 256-bit bus. It also is comprised of 1536 SPUs, 128 TAUs, and 32 ROPs.

Compare those specs to the Radeon R9 M390X, which has GPU clock speed of 723 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also features 2048 Stream Processors, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X 125 Watts
GeForce GTX 880M 130 Watts
Difference: 5 Watts (4%)

Memory Bandwidth

As far as performance goes, the Radeon R9 M390X should theoretically be much better than the GeForce GTX 880M overall. (explain)

Radeon R9 M390X 160000 MB/sec
GeForce GTX 880M 128000 MB/sec
Difference: 32000 (25%)

Texel Rate

The GeForce GTX 880M should be a lot (about 32%) better at AF than the Radeon R9 M390X. (explain)

GeForce GTX 880M 122112 Mtexels/sec
Radeon R9 M390X 92544 Mtexels/sec
Difference: 29568 (32%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 880M is the winner, by a large margin. (explain)

GeForce GTX 880M 30528 Mpixels/sec
Radeon R9 M390X 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

Display Prices

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GeForce GTX 880M

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 880M Radeon R9 M390X
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 largest amount of data (in units of MB per second) that can be transferred across the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, 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 clock speed of the chip. The higher this number, 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 maximum number of pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate 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 filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 880M

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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