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

Intro

Compare all of that to the GeForce GT 450 (OEM), which has a GPU core clock speed of 790 MHz, and 1536 MB of GDDR5 RAM set to run at 1000 MHz through a 192-bit bus. It also is comprised of 144 SPUs, 24 TAUs, and 24 Raster Operation 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

In theory, the GeForce GT 450 (OEM) is 650% quicker than the GeForce 9400 GT 256MB overall, due to its higher data rate. (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) will be a lot (about 331%) more effective at anisotropic filtering 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) should be quite a bit (approximately 762%) faster with regards to AA than the GeForce 9400 GT 256MB, and able to handle higher resolutions while still performing well. (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: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's 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 number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.