GeForce 8400 GS 512MB vs GeForce GTX 460 1GB

Intro

Compare all of that to the GeForce GTX 460 1GB, which has GPU clock speed of 675 MHz, and 1024 MB of GDDR5 memory set to run at 900 MHz through a 256-bit bus. It also is comprised of 336 SPUs, 56 Texture Address Units, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8400 GS 512MB		40 Watts
GeForce GTX 460 1GB		160 Watts
	Difference: 120 Watts (300%)

Memory Bandwidth

The GeForce GTX 460 1GB, in theory, should be much faster than the GeForce 8400 GS 512MB in general. (explain)

GeForce GTX 460 1GB		115200 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 108800 (1700%)

Texel Rate

The GeForce GTX 460 1GB will be a lot (approximately 627%) better at anisotropic filtering than the GeForce 8400 GS 512MB. (explain)

GeForce GTX 460 1GB		37800 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 32600 (627%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 460 1GB is superior to the GeForce 8400 GS 512MB, by far. (explain)

GeForce GTX 460 1GB		21600 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 19000 (731%)

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 megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, 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 maximum number of pixels that the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.