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GeForce 8400 GS 512MB vs GeForce GTS 450 1GB

Intro

The GeForce 8400 GS 512MB uses a 80 nm design. nVidia has set the core frequency at 650 MHz. The DDR2 memory is set to run at a frequency of 400 MHz on this specific card. It features 16 SPUs as well as 8 TAUs and 4 ROPs.

Compare those specifications to the GeForce GTS 450 1GB, which features GPU clock speed of 783 MHz, and 1024 MB of GDDR5 RAM running at 902 MHz through a 128-bit bus. It also features 192 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8400 GS 512MB 40 Watts
GeForce GTS 450 1GB 106 Watts
Difference: 66 Watts (165%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 450 1GB should perform much faster than the GeForce 8400 GS 512MB overall. (explain)

GeForce GTS 450 1GB 57728 MB/sec
GeForce 8400 GS 512MB 6400 MB/sec
Difference: 51328 (802%)

Texel Rate

The GeForce GTS 450 1GB should be quite a bit (about 382%) more effective at anisotropic filtering than the GeForce 8400 GS 512MB. (explain)

GeForce GTS 450 1GB 25056 Mtexels/sec
GeForce 8400 GS 512MB 5200 Mtexels/sec
Difference: 19856 (382%)

Pixel Rate

The GeForce GTS 450 1GB will be much (about 382%) more effective at full screen anti-aliasing than the GeForce 8400 GS 512MB, and also will be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTS 450 1GB 12528 Mpixels/sec
GeForce 8400 GS 512MB 2600 Mpixels/sec
Difference: 9928 (382%)

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 8400 GS 512MB

Amazon.com

Check prices at:

GeForce GTS 450 1GB

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 8400 GS 512MB GeForce GTS 450 1GB
Manufacturer nVidia nVidia
Year June 2007 September 2010
Code Name G86 GF106
Memory 512 MB 1024 MB
Core Speed 650 MHz 783 MHz
Memory Speed 800 MHz 3608 MHz
Power (Max TDP) 40 watts 106 watts
Bandwidth 6400 MB/sec 57728 MB/sec
Texel Rate 5200 Mtexels/sec 25056 Mtexels/sec
Pixel Rate 2600 Mpixels/sec 12528 Mpixels/sec
Unified Shaders 16 192
Texture Mapping Units 8 32
Render Output Units 4 16
Bus Type DDR2 GDDR5
Bus Width 64-bit 128-bit
Fab Process 80 nm 40 nm
Transistors 210 million 1170 million
Bus PCIe x16, PCI PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once 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, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is calculated by multiplying the total texture units of the card 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 applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). 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 reach the max fill rate.

Display Prices

Hide Prices

GeForce 8400 GS 512MB

Amazon.com

Check prices at:

GeForce GTS 450 1GB

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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