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

Intro

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

Compare those specifications to the GeForce 9400 GT 256MB, which comes with a core clock frequency of 550 MHz and a GDDR2 memory speed of 400 MHz. It also makes use of a 128-bit memory bus, and uses a 65 nm design. It is comprised of 16 SPUs, 8 TAUs, and 4 Raster Operation 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 memory bandwidth, so theoretically they should have the same performance. (explain)

Texel Rate

The GeForce 8600 GS (OEM) will be quite a bit (approximately 96%) more effective at AF 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

If using a high resolution is important to you, then the GeForce 8600 GS (OEM) is a better choice, by a large margin. (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: Memory bandwidth is the max amount of data (counted in megabytes per second) that can be transferred past the external memory interface in a second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core 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 rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max 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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