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GeForce 825M vs GeForce 8600 GT 1GB DDR2

Intro

The GeForce 825M uses a 28 nm design. nVidia has clocked the core frequency at 850 MHz. The DDR3 RAM runs at a frequency of 900 MHz on this particular card. It features 384 SPUs as well as 16 TAUs and 8 Rasterization Operator Units.

Compare that to the GeForce 8600 GT 1GB DDR2, which uses a 80 nm design. nVidia has set the core frequency at 540 MHz. The DDR2 RAM runs at a speed of 400 MHz on this model. It features 32 SPUs as well as 16 Texture Address Units and 8 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M 33 Watts
GeForce 8600 GT 1GB DDR2 47 Watts
Difference: 14 Watts (42%)

Memory Bandwidth

Performance-wise, the GeForce 825M should theoretically be just a bit better than the GeForce 8600 GT 1GB DDR2 in general. (explain)

GeForce 825M 14400 MB/sec
GeForce 8600 GT 1GB DDR2 12800 MB/sec
Difference: 1600 (13%)

Texel Rate

The GeForce 825M will be quite a bit (more or less 57%) more effective at AF than the GeForce 8600 GT 1GB DDR2. (explain)

GeForce 825M 13600 Mtexels/sec
GeForce 8600 GT 1GB DDR2 8640 Mtexels/sec
Difference: 4960 (57%)

Pixel Rate

The GeForce 825M should be a lot (about 57%) better at anti-aliasing than the GeForce 8600 GT 1GB DDR2, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce 825M 6800 Mpixels/sec
GeForce 8600 GT 1GB 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

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GeForce 8600 GT 1GB DDR2

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 825M GeForce 8600 GT 1GB DDR2
Manufacturer nVidia nVidia
Year January 27 2014 April 2007
Code Name GK208 G84
Memory 2048 MB 1024 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: Bandwidth is the largest amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total amount 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 most pixels that the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce 825M

Amazon.com

Check prices at:

GeForce 8600 GT 1GB 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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