GeForce 8400 GS 512MB vs GeForce GTX 650 Ti

Intro

Compare those specs to the GeForce GTX 650 Ti, which comes with GPU clock speed of 928 MHz, and 1024 MB of GDDR5 RAM running at 1350 MHz through a 128-bit bus. It also is comprised of 768 Stream Processors, 64 Texture Address Units, 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 650 Ti		110 Watts
	Difference: 70 Watts (175%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 650 Ti should be 1250% quicker than the GeForce 8400 GS 512MB overall, due to its greater data rate. (explain)

GeForce GTX 650 Ti		86400 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 80000 (1250%)

Texel Rate

The GeForce GTX 650 Ti will be a lot (about 1042%) better at anisotropic filtering than the GeForce 8400 GS 512MB. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 54192 (1042%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 650 Ti is superior to the GeForce 8400 GS 512MB, and very much so. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 12248 (471%)

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 (counted in megabytes per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the card's interface 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 better the bandwidth is, 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 texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics 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 maximum number of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.