GeForce 8400 GS 512MB vs GeForce GTX 750

Intro

Compare all that to the GeForce GTX 750, which comes with a GPU core clock speed of 1020 MHz, and 1024 MB of GDDR5 RAM set to run at 1250 MHz through a 128-bit bus. It also features 512 Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8400 GS 512MB		40 Watts
GeForce GTX 750		55 Watts
	Difference: 15 Watts (38%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 750 should in theory be a lot better than the GeForce 8400 GS 512MB in general. (explain)

GeForce GTX 750		80000 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 73600 (1150%)

Texel Rate

The GeForce GTX 750 is quite a bit (about 528%) more effective at texture filtering than the GeForce 8400 GS 512MB. (explain)

GeForce GTX 750		32640 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 27440 (528%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 750 is superior to the GeForce 8400 GS 512MB, and very much so. (explain)

GeForce GTX 750		16320 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 13720 (528%)

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 maximum amount of data (counted in megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it must 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 processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant 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 max fill rate.