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GeForce 8400 GS 512MB vs GeForce GTS 450 1GB

Intro

The GeForce 8400 GS 512MB features a GPU core clock speed of 650 MHz, and the 512 MB of DDR2 memory is set to run at 400 MHz through a 64-bit bus. It also is made up of 16 SPUs, 8 TAUs, and 4 Raster Operation Units.

Compare all of that to the GeForce GTS 450 1GB, which makes use of a 40 nm design. nVidia has clocked the core frequency at 783 MHz. The GDDR5 RAM runs at a speed of 902 MHz on this card. It features 192 SPUs as well as 32 TAUs and 16 ROPs.

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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 quite a bit faster than the GeForce 8400 GS 512MB in general. (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 is a lot (approximately 382%) better at texture 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

If running with a high resolution is important to you, then the GeForce GTS 450 1GB is a better choice, and very much so. (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: Memory bandwidth is the maximum amount of information (in units of megabytes per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes 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, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum 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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