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GeForce 840M vs Radeon R9 M375

Intro

The GeForce 840M has clock speeds of 1029 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 384 SPUs along with 24 Texture Address Units and 8 ROPs.

Compare those specs to the Radeon R9 M375, which makes use of a 28 nm design. AMD has clocked the core frequency at 1015 MHz. The DDR3 RAM runs at a speed of 1100 MHz on this model. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M375, in theory, should perform much faster than the GeForce 840M overall. (explain)

Radeon R9 M375 35200 MB/sec
GeForce 840M 16000 MB/sec
Difference: 19200 (120%)

Texel Rate

The Radeon R9 M375 will be a lot (about 64%) more effective at anisotropic filtering than the GeForce 840M. (explain)

Radeon R9 M375 40600 Mtexels/sec
GeForce 840M 24696 Mtexels/sec
Difference: 15904 (64%)

Pixel Rate

The Radeon R9 M375 should be quite a bit (approximately 97%) more effective at full screen anti-aliasing than the GeForce 840M, and should be able to handle higher resolutions better. (explain)

Radeon R9 M375 16240 Mpixels/sec
GeForce 840M 8232 Mpixels/sec
Difference: 8008 (97%)

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 840M

Amazon.com

Check prices at:

Radeon R9 M375

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 840M Radeon R9 M375
Manufacturer nVidia AMD
Year March 12 2014 2015
Code Name GM108 Cape Verde
Memory 2048 MB 4096 MB
Core Speed 1029 MHz 1015 MHz
Memory Speed 2000 MHz 2200 MHz
Power (Max TDP) 30 watts (Unknown) watts
Bandwidth 16000 MB/sec 35200 MB/sec
Texel Rate 24696 Mtexels/sec 40600 Mtexels/sec
Pixel Rate 8232 Mpixels/sec 16240 Mpixels/sec
Unified Shaders 384 640
Texture Mapping Units 24 40
Render Output Units 8 16
Bus Type DDR3 DDR3
Bus Width 64-bit 128-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 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 RAM, the result 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 number of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce 840M

Amazon.com

Check prices at:

Radeon R9 M375

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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