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GeForce 940M vs Radeon HD 3850 512MB

Intro

The GeForce 940M uses a 28 nm design. nVidia has clocked the core speed at 1072 MHz. The DDR3 memory works at a speed of 1000 MHz on this card. It features 384 SPUs along with 24 Texture Address Units and 8 Rasterization Operator Units.

Compare all of that to the Radeon HD 3850 512MB, which features core speeds of 668 MHz on the GPU, and 828 MHz on the 512 MB of GDDR3 RAM. It features 320(64x5) SPUs along with 16 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 3850 512MB should be 231% faster than the GeForce 940M overall, because of its greater data rate. (explain)

Radeon HD 3850 512MB 52992 MB/sec
GeForce 940M 16000 MB/sec
Difference: 36992 (231%)

Texel Rate

The GeForce 940M should be much (more or less 141%) more effective at texture filtering than the Radeon HD 3850 512MB. (explain)

GeForce 940M 25728 Mtexels/sec
Radeon HD 3850 512MB 10688 Mtexels/sec
Difference: 15040 (141%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 3850 512MB is the winner, by a large margin. (explain)

Radeon HD 3850 512MB 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 512MB

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 512MB
Manufacturer nVidia AMD
Year March 12 2015 Nov 19, 2007
Code Name GM108 RV670 PRO
Memory 2048 MB 512 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: Bandwidth is the maximum amount of information (in units of MB per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster 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 can be processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce 940M

Amazon.com

Check prices at:

Radeon HD 3850 512MB

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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