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GeForce GT 320 vs GeForce GTX 870M

Intro

The GeForce GT 320 features a clock frequency of 540 MHz and a GDDR3 memory speed of 790 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It is comprised of 72 SPUs, 24 TAUs, and 8 ROPs.

Compare all that to the GeForce GTX 870M, which comes with a clock frequency of 941 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 192-bit bus, and uses a 28 nm design. It is comprised of 1344 SPUs, 112 TAUs, and 24 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320 43 Watts
GeForce GTX 870M 110 Watts
Difference: 67 Watts (156%)

Memory Bandwidth

The GeForce GTX 870M should theoretically perform quite a bit faster than the GeForce GT 320 in general. (explain)

GeForce GTX 870M 96000 MB/sec
GeForce GT 320 25280 MB/sec
Difference: 70720 (280%)

Texel Rate

The GeForce GTX 870M should be quite a bit (about 713%) more effective at texture filtering than the GeForce GT 320. (explain)

GeForce GTX 870M 105392 Mtexels/sec
GeForce GT 320 12960 Mtexels/sec
Difference: 92432 (713%)

Pixel Rate

The GeForce GTX 870M will be much (about 423%) more effective at FSAA than the GeForce GT 320, and also should be capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GTX 870M 22584 Mpixels/sec
GeForce GT 320 4320 Mpixels/sec
Difference: 18264 (423%)

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 GT 320

Amazon.com

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GeForce GTX 870M

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 GT 320 GeForce GTX 870M
Manufacturer nVidia nVidia
Year February 2010 March 12 2014
Code Name GT215 GK104
Memory 1024 MB 3072 MB
Core Speed 540 MHz 941 MHz
Memory Speed 1580 MHz 4000 MHz
Power (Max TDP) 43 watts 110 watts
Bandwidth 25280 MB/sec 96000 MB/sec
Texel Rate 12960 Mtexels/sec 105392 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 22584 Mpixels/sec
Unified Shaders 72 1344
Texture Mapping Units 24 112
Render Output Units 8 24
Bus Type GDDR3 GDDR5
Bus Width 128-bit 192-bit
Fab Process 40 nm 28 nm
Transistors 727 million (Unknown) million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 12
OpenGL Version OpenGL 3.3 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics 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 maximum amount of pixels that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, especially 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 GT 320

Amazon.com

Check prices at:

GeForce GTX 870M

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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