GeForce 8400 GS 512MB vs Nvidia Titan Xp

Intro

Compare those specifications to the Nvidia Titan Xp, which has core clock speeds of 1582 MHz on the GPU, and 1426 MHz on the 12288 MB of GDDR5X RAM. It features 3840 SPUs along with 240 Texture Address Units and 96 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

In theory, the Nvidia Titan Xp should be a lot faster than the GeForce 8400 GS 512MB overall. (explain)

Nvidia Titan Xp		560845 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 554445 (8663%)

Texel Rate

The Nvidia Titan Xp should be quite a bit (about 7202%) more effective at anisotropic filtering than the GeForce 8400 GS 512MB. (explain)

Nvidia Titan Xp		379680 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 374480 (7202%)

Pixel Rate

The Nvidia Titan Xp should be a lot (approximately 5741%) more effective at FSAA than the GeForce 8400 GS 512MB, and able to handle higher resolutions without losing too much performance. (explain)

Nvidia Titan Xp		151872 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 149272 (5741%)

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 max amount of data (in units of MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record 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 card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill 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 get to the max fill rate.