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GeForce 840M vs GeForce GTX 260 216SP 55 nm

Intro

The GeForce 840M uses a 28 nm design. nVidia has clocked the core frequency at 1029 MHz. The DDR3 memory is set to run at a frequency of 1000 MHz on this model. It features 384 SPUs along with 24 Texture Address Units and 8 ROPs.

Compare those specs to the GeForce GTX 260 216SP 55 nm, which makes use of a 55 nm design. nVidia has set the core frequency at 576 MHz. The GDDR3 RAM works at a speed of 999 MHz on this model. It features 216 SPUs along with 72 Texture Address Units and 28 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 840M 30 Watts
GeForce GTX 260 216SP 55 nm 171 Watts
Difference: 141 Watts (470%)

Memory Bandwidth

In theory, the GeForce GTX 260 216SP 55 nm is 599% faster than the GeForce 840M overall, due to its greater bandwidth. (explain)

GeForce GTX 260 216SP 55 nm 111888 MB/sec
GeForce 840M 16000 MB/sec
Difference: 95888 (599%)

Texel Rate

The GeForce GTX 260 216SP 55 nm should be much (approximately 68%) better at texture filtering than the GeForce 840M. (explain)

GeForce GTX 260 216SP 55 nm 41472 Mtexels/sec
GeForce 840M 24696 Mtexels/sec
Difference: 16776 (68%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 260 216SP 55 nm is a better choice, and very much so. (explain)

GeForce GTX 260 216SP 55 nm 16128 Mpixels/sec
GeForce 840M 8232 Mpixels/sec
Difference: 7896 (96%)

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 840M

Amazon.com

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GeForce GTX 260 216SP 55 nm

Amazon.com

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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 840M GeForce GTX 260 216SP 55 nm
Manufacturer nVidia nVidia
Year March 12 2014 December 22, 2008
Code Name GM108 G200b
Memory 2048 MB 896 MB
Core Speed 1029 MHz 576 MHz
Memory Speed 2000 MHz 1998 MHz
Power (Max TDP) 30 watts 171 watts
Bandwidth 16000 MB/sec 111888 MB/sec
Texel Rate 24696 Mtexels/sec 41472 Mtexels/sec
Pixel Rate 8232 Mpixels/sec 16128 Mpixels/sec
Unified Shaders 384 216
Texture Mapping Units 24 72
Render Output Units 8 28
Bus Type DDR3 GDDR3
Bus Width 64-bit 448-bit
Fab Process 28 nm 55 nm
Transistors (Unknown) million 1400 million
Bus PCIe 3.0 x16 PCIe x16 2.0
DirectX Version DirectX 12 DirectX 10
OpenGL Version OpenGL 4.5 OpenGL 3.1

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR memory, the result 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce 840M

Amazon.com

Check prices at:

GeForce GTX 260 216SP 55 nm

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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