GeForce 8400 GS 512MB vs GeForce GTX Titan

Intro

Compare all that to the GeForce GTX Titan, which features a clock speed of 837 MHz and a GDDR5 memory frequency of 1502 MHz. It also makes use of a 384-bit bus, and uses a 28 nm design. It is made up of 2688 SPUs, 224 TAUs, and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8400 GS 512MB		40 Watts
GeForce GTX Titan		250 Watts
	Difference: 210 Watts (525%)

Memory Bandwidth

Performance-wise, the GeForce GTX Titan should in theory be a lot superior to the GeForce 8400 GS 512MB in general. (explain)

GeForce GTX Titan		288384 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 281984 (4406%)

Texel Rate

The GeForce GTX Titan should be a lot (more or less 3506%) better at anisotropic filtering than the GeForce 8400 GS 512MB. (explain)

GeForce GTX Titan		187488 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 182288 (3506%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX Titan is a better choice, and very much so. (explain)

GeForce GTX Titan		40176 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 37576 (1445%)

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

Specifications

Memory Bandwidth: Bandwidth is the largest amount of data (in units of MB per second) that can be moved over the external memory interface in one second. It's worked out by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better 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 number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total amount of 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.