GeForce 8400 GS 512MB vs GeForce GTX Titan

Intro

Compare those specs to the GeForce GTX Titan, which comes with a clock frequency of 837 MHz and a GDDR5 memory speed of 1502 MHz. It also makes use of a 384-bit memory bus, and uses a 28 nm design. It features 2688 SPUs, 224 TAUs, and 48 Raster Operation Units.

Display Graphs

Hide Graphs

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

Theoretically speaking, the GeForce GTX Titan should perform a lot faster than 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 quite a bit (approximately 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 high levels of AA is important to you, then the GeForce GTX Titan is the winner, 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: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transported across the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR 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 higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.