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

Intro

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

Compare those specifications to the GeForce 9400 GT 256MB, which features a core clock frequency of 550 MHz and a GDDR2 memory frequency of 400 MHz. It also makes use of a 128-bit bus, and makes use of a 65 nm design. It features 16 SPUs, 8 TAUs, and 4 ROPs.

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 exactly the same bandwidth, so in theory they should have the same performance. (explain)

Texel Rate

The GeForce 8600 GS (OEM) is much (more or less 96%) more effective at texture 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) should be quite a bit (approximately 96%) more effective at anti-aliasing than the GeForce 9400 GT 256MB, and also able to handle higher screen resolutions while still performing well. (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

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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: Bandwidth is the largest amount of data (measured in megabytes per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling 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 that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to 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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