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GeForce 940M vs Radeon HD 4670 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 ROPs.

Compare all that to the Radeon HD 4670 1GB, which makes use of a 55 nm design. AMD has set the core frequency at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 memory works at a speed of 1100 MHz on this specific card. It features 320(64x5) SPUs along with 32 TAUs and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 4670 1GB should in theory be much better than the GeForce 940M overall. (explain)

Radeon HD 4670 1GB 35200 MB/sec
GeForce 940M 16000 MB/sec
Difference: 19200 (120%)

Texel Rate

The GeForce 940M is a bit (approximately 7%) more effective at anisotropic filtering than the Radeon HD 4670 1GB. (explain)

GeForce 940M 25728 Mtexels/sec
Radeon HD 4670 1GB 24000 Mtexels/sec
Difference: 1728 (7%)

Pixel Rate

The GeForce 940M should be a lot (approximately 43%) more effective at AA than the Radeon HD 4670 1GB, and capable of handling higher resolutions better. (explain)

GeForce 940M 8576 Mpixels/sec
Radeon HD 4670 1GB 6000 Mpixels/sec
Difference: 2576 (43%)

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 4670 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 4670 1GB
Manufacturer nVidia AMD
Year March 12 2015 Sep 10, 2008
Code Name GM108 RV730 XT
Memory 2048 MB 1024 MB
Core Speed 1072 MHz 750 MHz
Memory Speed 2000 MHz 2200 MHz
Power (Max TDP) (Unknown) watts 70 watts
Bandwidth 16000 MB/sec 35200 MB/sec
Texel Rate 25728 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 8576 Mpixels/sec 6000 Mpixels/sec
Unified Shaders 384 320(64x5)
Texture Mapping Units 24 32
Render Output Units 8 8
Bus Type DDR3 GDDR4/GDDR3/DDR3/DDR2
Bus Width 64-bit 128-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million 514 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 largest amount of information (measured in megabytes per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR RAM, it 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 anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per 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 video 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 maximum number of pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce 940M

Amazon.com

Check prices at:

Radeon HD 4670 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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