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GeForce 940M vs GeForce GT 340 1GB

Intro

The GeForce 940M features a core clock speed of 1072 MHz and a DDR3 memory speed of 1000 MHz. It also features a 64-bit memory bus, and makes use of a 28 nm design. It features 384 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

Compare that to the GeForce GT 340 1GB, which has a GPU core clock speed of 550 MHz, and 1024 MB of GDDR5 memory set to run at 850 MHz through a 128-bit bus. It also is made up of 96 SPUs, 32 Texture Address Units, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GT 340 1GB is 240% quicker than the GeForce 940M overall, due to its higher data rate. (explain)

GeForce GT 340 1GB 54400 MB/sec
GeForce 940M 16000 MB/sec
Difference: 38400 (240%)

Texel Rate

The GeForce 940M should be a lot (about 46%) faster with regards to anisotropic filtering than the GeForce GT 340 1GB. (explain)

GeForce 940M 25728 Mtexels/sec
GeForce GT 340 1GB 17600 Mtexels/sec
Difference: 8128 (46%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce 940M is the winner, and very much so. (explain)

GeForce 940M 8576 Mpixels/sec
GeForce GT 340 1GB 4400 Mpixels/sec
Difference: 4176 (95%)

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

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GeForce GT 340 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 GeForce GT 340 1GB
Manufacturer nVidia nVidia
Year March 12 2015 February 2010
Code Name GM108 GT215
Memory 2048 MB 1024 MB
Core Speed 1072 MHz 550 MHz
Memory Speed 2000 MHz 3400 MHz
Power (Max TDP) (Unknown) watts 69 watts
Bandwidth 16000 MB/sec 54400 MB/sec
Texel Rate 25728 Mtexels/sec 17600 Mtexels/sec
Pixel Rate 8576 Mpixels/sec 4400 Mpixels/sec
Unified Shaders 384 96
Texture Mapping Units 24 32
Render Output Units 8 8
Bus Type DDR3 GDDR5
Bus Width 64-bit 128-bit
Fab Process 28 nm 40 nm
Transistors (Unknown) million 727 million
Bus PCIe 3.0 x16 PCIe x16
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.3

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better 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 processed per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill 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 get to the maximum fill rate.

Display Prices

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GeForce 940M

Amazon.com

Check prices at:

GeForce GT 340 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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