GeForce 8400 GS 512MB vs Geforce GTX 760

Intro

Compare those specs to the Geforce GTX 760, which features a core clock frequency of 980 MHz and a GDDR5 memory speed of 1502 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It features 1152 SPUs, 96 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8400 GS 512MB		40 Watts
Geforce GTX 760		170 Watts
	Difference: 130 Watts (325%)

Memory Bandwidth

The Geforce GTX 760, in theory, should be a lot faster than the GeForce 8400 GS 512MB overall. (explain)

Geforce GTX 760		192256 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 185856 (2904%)

Texel Rate

The Geforce GTX 760 is a lot (approximately 1709%) faster with regards to anisotropic filtering than the GeForce 8400 GS 512MB. (explain)

Geforce GTX 760		94080 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 88880 (1709%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Geforce GTX 760 is a better choice, and very much so. (explain)

Geforce GTX 760		31360 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 28760 (1106%)

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 maximum amount of data (in units of MB per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, 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 maximum number of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.