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GeForce 8600 GT 256MB DDR2 vs GeForce 920M

Intro

The GeForce 8600 GT 256MB DDR2 has a clock speed of 540 MHz and a DDR2 memory speed of 400 MHz. It also uses a 128-bit bus, and uses a 80 nm design. It is comprised of 32 SPUs, 16 Texture Address Units, and 8 ROPs.

Compare those specifications to the GeForce 920M, which makes use of a 28 nm design. nVidia has clocked the core speed at 954 MHz. The DDR3 RAM runs at a frequency of 900 MHz on this model. It features 384 SPUs along with 32 TAUs and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the GeForce 920M will be 13% faster than the GeForce 8600 GT 256MB DDR2 in general, due to its higher bandwidth. (explain)

GeForce 920M 14400 MB/sec
GeForce 8600 GT 256MB DDR2 12800 MB/sec
Difference: 1600 (13%)

Texel Rate

The GeForce 920M will be much (about 253%) more effective at texture filtering than the GeForce 8600 GT 256MB DDR2. (explain)

GeForce 920M 30528 Mtexels/sec
GeForce 8600 GT 256MB DDR2 8640 Mtexels/sec
Difference: 21888 (253%)

Pixel Rate

The GeForce 920M is much (about 77%) faster with regards to FSAA than the GeForce 8600 GT 256MB DDR2, and also will be able to handle higher resolutions better. (explain)

GeForce 920M 7632 Mpixels/sec
GeForce 8600 GT 256MB DDR2 4320 Mpixels/sec
Difference: 3312 (77%)

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 8600 GT 256MB DDR2

Amazon.com

Check prices at:

GeForce 920M

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 8600 GT 256MB DDR2 GeForce 920M
Manufacturer nVidia nVidia
Year April 2007 March 12 2015
Code Name G84 GK208
Memory 256 MB 2048 MB
Core Speed 540 MHz 954 MHz
Memory Speed 800 MHz 1800 MHz
Power (Max TDP) 47 watts (Unknown) watts
Bandwidth 12800 MB/sec 14400 MB/sec
Texel Rate 8640 Mtexels/sec 30528 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 7632 Mpixels/sec
Unified Shaders 32 384
Texture Mapping Units 16 32
Render Output Units 8 8
Bus Type DDR2 DDR3
Bus Width 128-bit 64-bit
Fab Process 80 nm 28 nm
Transistors 289 million (Unknown) million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 12
OpenGL Version OpenGL 3.0 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, the result 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 amount of texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce 8600 GT 256MB DDR2

Amazon.com

Check prices at:

GeForce 920M

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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