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GeForce 840M vs GeForce 9500 GT DDR2

Intro

The GeForce 840M comes with a GPU core speed of 1029 MHz, and the 2048 MB of DDR3 memory runs at 1000 MHz through a 64-bit bus. It also features 384 Stream Processors, 24 TAUs, and 8 ROPs.

Compare all of that to the GeForce 9500 GT DDR2, which has a core clock frequency of 550 MHz and a DDR2 memory frequency of 500 MHz. It also uses a 128-bit bus, and makes use of a 65 nm design. It is comprised of 32 SPUs, 16 TAUs, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 840M 30 Watts
GeForce 9500 GT DDR2 50 Watts
Difference: 20 Watts (67%)

Memory Bandwidth

Both cards have exactly the same bandwidth, so in theory they should have the same performance. (explain)

Texel Rate

The GeForce 840M should be much (more or less 181%) more effective at AF than the GeForce 9500 GT DDR2. (explain)

GeForce 840M 24696 Mtexels/sec
GeForce 9500 GT DDR2 8800 Mtexels/sec
Difference: 15896 (181%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce 840M is the winner, and very much so. (explain)

GeForce 840M 8232 Mpixels/sec
GeForce 9500 GT DDR2 4400 Mpixels/sec
Difference: 3832 (87%)

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

Check prices at:

GeForce 9500 GT DDR2

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 840M GeForce 9500 GT DDR2
Manufacturer nVidia nVidia
Year March 12 2014 July 2008
Code Name GM108 G96a
Memory 2048 MB 256 MB
Core Speed 1029 MHz 550 MHz
Memory Speed 2000 MHz 1000 MHz
Power (Max TDP) 30 watts 50 watts
Bandwidth 16000 MB/sec 16000 MB/sec
Texel Rate 24696 Mtexels/sec 8800 Mtexels/sec
Pixel Rate 8232 Mpixels/sec 4400 Mpixels/sec
Unified Shaders 384 32
Texture Mapping Units 24 16
Render Output Units 8 8
Bus Type DDR3 DDR2
Bus Width 64-bit 128-bit
Fab Process 28 nm 65 nm
Transistors (Unknown) million 314 million
Bus PCIe 3.0 x16 PCIe x16 2.0, PCI
DirectX Version DirectX 12 DirectX 10
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in MB per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels 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 amount of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce 840M

Amazon.com

Check prices at:

GeForce 9500 GT DDR2

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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