GeForce 8400 GS 512MB vs Geforce GTX 760

Intro

Compare that to the Geforce GTX 760, which has core speeds of 980 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 RAM. It features 1152 SPUs as well as 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

Performance-wise, the Geforce GTX 760 should theoretically be much better 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 should be quite a bit (approximately 1709%) better at AF 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

The Geforce GTX 760 should be quite a bit (about 1106%) faster with regards to anti-aliasing than the GeForce 8400 GS 512MB, and also will be able to handle higher screen resolutions without slowing down too much. (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 largest amount of data (counted in MB per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.