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GeForce 940M vs Radeon HD 3850 512MB

Intro

The GeForce 940M comes with a GPU core speed of 1072 MHz, and the 2048 MB of DDR3 RAM runs at 1000 MHz through a 64-bit bus. It also features 384 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

Compare those specs to the Radeon HD 3850 512MB, which makes use of a 55 nm design. AMD has clocked the core frequency at 668 MHz. The GDDR3 memory works at a speed of 828 MHz on this card. It features 320(64x5) SPUs as well as 16 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 3850 512MB, in theory, should be quite a bit faster than the GeForce 940M in general. (explain)

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

Texel Rate

The GeForce 940M will be much (approximately 141%) better at anisotropic 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

The Radeon HD 3850 512MB is much (about 25%) more effective at full screen anti-aliasing than the GeForce 940M, and will be able to handle higher resolutions better. (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 largest amount of information (measured in megabytes per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 once 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, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics 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 maximum amount of pixels that the graphics chip can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum 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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