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GeForce 825M vs GeForce GT 310

Intro

The GeForce 825M comes with a core clock speed of 850 MHz and a DDR3 memory speed of 900 MHz. It also makes use of a 64-bit bus, and uses a 28 nm design. It is comprised of 384 SPUs, 16 Texture Address Units, and 8 ROPs.

Compare all that to the GeForce GT 310, which features a clock speed of 589 MHz and a DDR2 memory frequency of 1000 MHz. It also makes use of a 64-bit bus, and uses a 40 nm design. It features 16 SPUs, 8 TAUs, and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 310 31 Watts
GeForce 825M 33 Watts
Difference: 2 Watts (6%)

Memory Bandwidth

The GeForce GT 310, in theory, should perform a small bit faster than the GeForce 825M in general. (explain)

GeForce GT 310 16000 MB/sec
GeForce 825M 14400 MB/sec
Difference: 1600 (11%)

Texel Rate

The GeForce 825M should be a lot (about 189%) more effective at AF than the GeForce GT 310. (explain)

GeForce 825M 13600 Mtexels/sec
GeForce GT 310 4712 Mtexels/sec
Difference: 8888 (189%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce 825M is the winner, and very much so. (explain)

GeForce 825M 6800 Mpixels/sec
GeForce GT 310 2356 Mpixels/sec
Difference: 4444 (189%)

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 825M

Amazon.com

Check prices at:

GeForce GT 310

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 825M GeForce GT 310
Manufacturer nVidia nVidia
Year January 27 2014 November 2009
Code Name GK208 GT218
Memory 2048 MB 512 MB
Core Speed 850 MHz 589 MHz
Memory Speed 1800 MHz 2000 MHz
Power (Max TDP) 33 watts 31 watts
Bandwidth 14400 MB/sec 16000 MB/sec
Texel Rate 13600 Mtexels/sec 4712 Mtexels/sec
Pixel Rate 6800 Mpixels/sec 2356 Mpixels/sec
Unified Shaders 384 16
Texture Mapping Units 16 8
Render Output Units 8 4
Bus Type DDR3 DDR2
Bus Width 64-bit 64-bit
Fab Process 28 nm 40 nm
Transistors (Unknown) million 260 million
Bus PCIe 3.0 x8 PCIe 2.0
DirectX Version DirectX 12 DirectX 10.1
OpenGL Version OpenGL 4.5 OpenGL 3.1

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in megabytes per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the 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 number of pixels the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce 825M

Amazon.com

Check prices at:

GeForce GT 310

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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