GeForce 8400 GS 512MB vs GeForce GTX 750

Intro

Compare those specifications to the GeForce GTX 750, which uses a 28 nm design. nVidia has clocked the core frequency at 1020 MHz. The GDDR5 memory works at a speed of 1250 MHz on this specific model. It features 512 SPUs along with 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 should theoretically perform quite a bit 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 is quite a bit (approximately 528%) better at anisotropic 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 screen resolution is important to you, then the GeForce GTX 750 is a better choice, by far. (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: Memory bandwidth is the max amount of information (in units of MB per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock 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 output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.