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GeForce 8600 GS (OEM) vs GeForce 9400 GT 256MB

Intro

The GeForce 8600 GS (OEM) features core speeds of 540 MHz on the GPU, and 400 MHz on the 256 MB of DDR2 memory. It features 32 SPUs along with 16 Texture Address Units and 8 Rasterization Operator Units.

Compare those specs to the GeForce 9400 GT 256MB, which comes with core speeds of 550 MHz on the GPU, and 400 MHz on the 256 MB of GDDR2 RAM. It features 16 SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GS (OEM) 47 Watts
GeForce 9400 GT 256MB 50 Watts
Difference: 3 Watts (6%)

Memory Bandwidth

Both cards have the exact same bandwidth, so in theory they should have identical performance. (explain)

Texel Rate

The GeForce 8600 GS (OEM) will be much (more or less 96%) better at anisotropic filtering than the GeForce 9400 GT 256MB. (explain)

GeForce 8600 GS (OEM) 8640 Mtexels/sec
GeForce 9400 GT 256MB 4400 Mtexels/sec
Difference: 4240 (96%)

Pixel Rate

The GeForce 8600 GS (OEM) is quite a bit (about 96%) faster with regards to anti-aliasing than the GeForce 9400 GT 256MB, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce 8600 GS (OEM) 4320 Mpixels/sec
GeForce 9400 GT 256MB 2200 Mpixels/sec
Difference: 2120 (96%)

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

Display Prices

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GeForce 8600 GS (OEM)

Amazon.com

Check prices at:

GeForce 9400 GT 256MB

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 GS (OEM) GeForce 9400 GT 256MB
Manufacturer nVidia nVidia
Year April 2007 August 2008
Code Name G84 G96a
Memory 256 MB 256 MB
Core Speed 540 MHz 550 MHz
Memory Speed 800 MHz 800 MHz
Power (Max TDP) 47 watts 50 watts
Bandwidth 12800 MB/sec 12800 MB/sec
Texel Rate 8640 Mtexels/sec 4400 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 2200 Mpixels/sec
Unified Shaders 32 16
Texture Mapping Units 16 8
Render Output Units 8 4
Bus Type DDR2 GDDR2
Bus Width 128-bit 128-bit
Fab Process 80 nm 65 nm
Transistors 289 million 314 million
Bus PCIe x16 PCIe x16 2.0, PCI
DirectX Version DirectX 10 DirectX 10
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transferred over the external memory interface in a second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 8600 GS (OEM)

Amazon.com

Check prices at:

GeForce 9400 GT 256MB

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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