GeForce 9400 GT 256MB vs GeForce GTX 460 (OEM)

Intro

Compare all of that to the GeForce GTX 460 (OEM), which features a GPU core clock speed of 650 MHz, and 1024 MB of GDDR5 RAM running at 850 MHz through a 256-bit bus. It also is made up of 336 SPUs, 56 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9400 GT 256MB		50 Watts
GeForce GTX 460 (OEM)		150 Watts
	Difference: 100 Watts (200%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 460 (OEM) will be 750% faster than the GeForce 9400 GT 256MB overall, because of its greater bandwidth. (explain)

GeForce GTX 460 (OEM)		108800 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 96000 (750%)

Texel Rate

The GeForce GTX 460 (OEM) will be a lot (about 727%) faster with regards to anisotropic filtering than the GeForce 9400 GT 256MB. (explain)

GeForce GTX 460 (OEM)		36400 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 32000 (727%)

Pixel Rate

The GeForce GTX 460 (OEM) should be much (more or less 845%) more effective at anti-aliasing than the GeForce 9400 GT 256MB, and also will be able to handle higher screen resolutions while still performing well. (explain)

GeForce GTX 460 (OEM)		20800 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 18600 (845%)

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 transported across the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, 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 can be applied in one second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the video 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 most pixels that the graphics chip could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.