GeForce 9400 GT 256MB vs GeForce GTX 570

Intro

Compare all of that to the GeForce GTX 570, which uses a 40 nm design. nVidia has set the core speed at 732 MHz. The GDDR5 RAM runs at a speed of 950 MHz on this specific model. It features 480 SPUs as well as 60 Texture Address Units and 40 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9400 GT 256MB		50 Watts
GeForce GTX 570		219 Watts
	Difference: 169 Watts (338%)

Memory Bandwidth

In theory, the GeForce GTX 570 should be much faster than the GeForce 9400 GT 256MB overall. (explain)

GeForce GTX 570		152000 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 139200 (1088%)

Texel Rate

The GeForce GTX 570 will be much (more or less 898%) better at texture filtering than the GeForce 9400 GT 256MB. (explain)

GeForce GTX 570		43920 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 39520 (898%)

Pixel Rate

The GeForce GTX 570 is quite a bit (about 1231%) more effective at AA than the GeForce 9400 GT 256MB, and will be able to handle higher resolutions more effectively. (explain)

GeForce GTX 570		29280 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 27080 (1231%)

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 (measured in MB per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses 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 anti-aliasing, High Dynamic Range and higher screen 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 amount of texture units by the core clock speed of the chip. The higher this number, 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 card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.