GeForce 9400 GT 256MB vs GeForce GTX 650 Ti

Intro

Compare those specs to the GeForce GTX 650 Ti, which comes with clock speeds of 928 MHz on the GPU, and 1350 MHz on the 1024 MB of GDDR5 RAM. It features 768 SPUs as well as 64 TAUs and 16 ROPs.

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 should in theory perform quite a bit faster than the GeForce 9400 GT 256MB overall. (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 much (about 1250%) more effective at anisotropic filtering 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

The GeForce GTX 650 Ti should be quite a bit (more or less 575%) more effective at anti-aliasing than the GeForce 9400 GT 256MB, and also will be able to handle higher screen resolutions without losing too much performance. (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: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transported over the external memory interface in a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better 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 amount of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total number of 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can 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 Render Output Units by the clock 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 also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.