GeForce 8400 GS 512MB vs GeForce GTX 750

Intro

Compare all of that to the GeForce GTX 750, which uses a 28 nm design. nVidia has clocked the core speed at 1020 MHz. The GDDR5 RAM is set to run at a frequency of 1250 MHz on this particular card. It features 512 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator 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

The GeForce GTX 750, in theory, should perform much faster than the GeForce 8400 GS 512MB overall. (explain)

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

Texel Rate

The GeForce GTX 750 will be quite a bit (more or less 528%) more effective at AF 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, by a large margin. (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 max amount of data (measured in megabytes per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the graphics 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 most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.