GeForce 9400 GT 256MB vs GeForce GTX 650 Ti

Intro

Compare those specs to the GeForce GTX 650 Ti, which has GPU clock speed of 928 MHz, and 1024 MB of GDDR5 memory running at 1350 MHz through a 128-bit bus. It also features 768 Stream Processors, 64 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9400 GT 256MB		50 Watts
GeForce GTX 650 Ti		110 Watts
	Difference: 60 Watts (120%)

Memory Bandwidth

The GeForce GTX 650 Ti, in theory, should perform much faster than the GeForce 9400 GT 256MB in general. (explain)

GeForce GTX 650 Ti		86400 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 73600 (575%)

Texel Rate

The GeForce GTX 650 Ti is quite a bit (more or less 1250%) more effective at AF than the GeForce 9400 GT 256MB. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 54992 (1250%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 650 Ti is superior to the GeForce 9400 GT 256MB, by a large margin. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 12648 (575%)

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 transferred over the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total number 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 per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.