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GeForce 940M vs Radeon HD 3850 1GB

Intro

The GeForce 940M uses a 28 nm design. nVidia has set the core frequency at 1072 MHz. The DDR3 memory runs at a frequency of 1000 MHz on this model. It features 384 SPUs as well as 24 Texture Address Units and 8 Rasterization Operator Units.

Compare those specifications to the Radeon HD 3850 1GB, which comes with core clock speeds of 668 MHz on the GPU, and 828 MHz on the 1024 MB of GDDR3 memory. It features 320(64x5) SPUs along with 16 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 3850 1GB should be 231% faster than the GeForce 940M overall, because of its greater data rate. (explain)

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

Texel Rate

The GeForce 940M will be a lot (about 141%) faster with regards to 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 should be quite a bit (approximately 25%) more effective at AA than the GeForce 940M, and also will be able to handle 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 max amount of information (counted in MB per second) that can be transported over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, 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 are applied in one second. This is worked out by multiplying the total 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 texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs 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 also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max 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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