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GeForce 825M vs GeForce 8600 GT 256MB DDR2

Intro

The GeForce 825M uses a 28 nm design. nVidia has clocked the core speed at 850 MHz. The DDR3 memory works at a frequency of 900 MHz on this particular model. It features 384 SPUs as well as 16 Texture Address Units and 8 ROPs.

Compare those specs to the GeForce 8600 GT 256MB DDR2, which comes with core clock speeds of 540 MHz on the GPU, and 400 MHz on the 256 MB of DDR2 RAM. 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 825M 33 Watts
GeForce 8600 GT 256MB DDR2 47 Watts
Difference: 14 Watts (42%)

Memory Bandwidth

In theory, the GeForce 825M should be 13% faster than the GeForce 8600 GT 256MB DDR2 in general, due to its higher bandwidth. (explain)

GeForce 825M 14400 MB/sec
GeForce 8600 GT 256MB DDR2 12800 MB/sec
Difference: 1600 (13%)

Texel Rate

The GeForce 825M should be quite a bit (about 57%) faster with regards to AF than the GeForce 8600 GT 256MB DDR2. (explain)

GeForce 825M 13600 Mtexels/sec
GeForce 8600 GT 256MB DDR2 8640 Mtexels/sec
Difference: 4960 (57%)

Pixel Rate

The GeForce 825M should be quite a bit (more or less 57%) more effective at full screen anti-aliasing than the GeForce 8600 GT 256MB DDR2, and will be able to handle higher resolutions while still performing well. (explain)

GeForce 825M 6800 Mpixels/sec
GeForce 8600 GT 256MB DDR2 4320 Mpixels/sec
Difference: 2480 (57%)

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 8600 GT 256MB 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 825M GeForce 8600 GT 256MB DDR2
Manufacturer nVidia nVidia
Year January 27 2014 April 2007
Code Name GK208 G84
Memory 2048 MB 256 MB
Core Speed 850 MHz 540 MHz
Memory Speed 1800 MHz 800 MHz
Power (Max TDP) 33 watts 47 watts
Bandwidth 14400 MB/sec 12800 MB/sec
Texel Rate 13600 Mtexels/sec 8640 Mtexels/sec
Pixel Rate 6800 Mpixels/sec 4320 Mpixels/sec
Unified Shaders 384 32
Texture Mapping Units 16 16
Render Output Units 8 8
Bus Type DDR3 DDR2
Bus Width 64-bit 128-bit
Fab Process 28 nm 80 nm
Transistors (Unknown) million 289 million
Bus PCIe 3.0 x8 PCIe x16
DirectX Version DirectX 12 DirectX 10
OpenGL Version OpenGL 4.5 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units of the card by the core 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 per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 825M

Amazon.com

Check prices at:

GeForce 8600 GT 256MB 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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