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GeForce 840M vs GeForce 9500 GT DDR2

Intro

The GeForce 840M uses a 28 nm design. nVidia has set the core frequency at 1029 MHz. The DDR3 RAM works at a frequency of 1000 MHz on this particular model. It features 384 SPUs as well as 24 TAUs and 8 ROPs.

Compare all of that to the GeForce 9500 GT DDR2, which features clock speeds of 550 MHz on the GPU, and 500 MHz on the 256 MB of DDR2 memory. It features 32 SPUs as well as 16 TAUs and 8 ROPs.

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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 memory bandwidth, so theoretically they should have the same performance. (explain)

Texel Rate

The GeForce 840M should be quite a bit (more or less 181%) better at texture filtering than the GeForce 9500 GT DDR2. (explain)

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

Pixel Rate

The GeForce 840M will be quite a bit (approximately 87%) better at AA than the GeForce 9500 GT DDR2, and also will be capable of handling higher resolutions better. (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: Memory bandwidth is the maximum amount of data (measured in MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines 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 also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max 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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