GeForce 9400 GT 256MB vs GeForce GT 450 (OEM)

Intro

Compare those specifications to the GeForce GT 450 (OEM), which uses a 40 nm design. nVidia has set the core speed at 790 MHz. The GDDR5 memory runs at a frequency of 1000 MHz on this particular card. It features 144 SPUs along with 24 TAUs and 24 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9400 GT 256MB		50 Watts
GeForce GT 450 (OEM)		106 Watts
	Difference: 56 Watts (112%)

Memory Bandwidth

As far as performance goes, the GeForce GT 450 (OEM) should theoretically be much better than the GeForce 9400 GT 256MB overall. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 83200 (650%)

Texel Rate

The GeForce GT 450 (OEM) should be a lot (approximately 331%) more effective at AF than the GeForce 9400 GT 256MB. (explain)

GeForce GT 450 (OEM)		18960 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 14560 (331%)

Pixel Rate

The GeForce GT 450 (OEM) will be quite a bit (about 762%) better at FSAA than the GeForce 9400 GT 256MB, and capable of handling higher screen resolutions without slowing down too much. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 16760 (762%)

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 (counted in megabytes per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If 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 high resolutions.

Texel Rate: Texel rate is the maximum 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 this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.