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GeForce 940M vs Radeon HD 3850 1GB

Intro

The GeForce 940M makes use of a 28 nm design. nVidia has set the core frequency at 1072 MHz. The DDR3 RAM runs at a frequency of 1000 MHz on this particular card. It features 384 SPUs as well as 24 Texture Address Units and 8 ROPs.

Compare that to the Radeon HD 3850 1GB, which uses a 55 nm design. AMD has set the core speed at 668 MHz. The GDDR3 memory runs at a speed of 828 MHz on this particular model. It features 320(64x5) SPUs as well as 16 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 3850 1GB should be quite a bit faster than the GeForce 940M in general. (explain)

Radeon HD 3850 1GB 52992 MB/sec
GeForce 940M 16000 MB/sec
Difference: 36992 (231%)

Texel Rate

The GeForce 940M is quite a bit (about 141%) better at texture filtering than the Radeon HD 3850 1GB. (explain)

GeForce 940M 25728 Mtexels/sec
Radeon HD 3850 1GB 10688 Mtexels/sec
Difference: 15040 (141%)

Pixel Rate

The Radeon HD 3850 1GB will be much (about 25%) better at anti-aliasing than the GeForce 940M, and capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 3850 1GB 10688 Mpixels/sec
GeForce 940M 8576 Mpixels/sec
Difference: 2112 (25%)

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 940M

Amazon.com

Check prices at:

Radeon HD 3850 1GB

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 940M Radeon HD 3850 1GB
Manufacturer nVidia AMD
Year March 12 2015 Nov 19, 2007
Code Name GM108 RV670 PRO
Memory 2048 MB 1024 MB
Core Speed 1072 MHz 668 MHz
Memory Speed 2000 MHz 1656 MHz
Power (Max TDP) (Unknown) watts 75 watts
Bandwidth 16000 MB/sec 52992 MB/sec
Texel Rate 25728 Mtexels/sec 10688 Mtexels/sec
Pixel Rate 8576 Mpixels/sec 10688 Mpixels/sec
Unified Shaders 384 320(64x5)
Texture Mapping Units 24 16
Render Output Units 8 16
Bus Type DDR3 GDDR3
Bus Width 64-bit 256-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 2.0 x16/AGP 8x
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be moved over the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total number of texture units 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 per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to 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 ability to reach the maximum fill rate.

Display Prices

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GeForce 940M

Amazon.com

Check prices at:

Radeon HD 3850 1GB

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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