GeForce 9400 GT 256MB vs GeForce GTX 465

Intro

Compare all of that to the GeForce GTX 465, which features GPU clock speed of 607 MHz, and 1024 MB of GDDR5 RAM set to run at 802 MHz through a 256-bit bus. It also is made up of 352 Stream Processors, 44 Texture Address Units, 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 465		200 Watts
	Difference: 150 Watts (300%)

Memory Bandwidth

Performance-wise, the GeForce GTX 465 should theoretically be quite a bit better than the GeForce 9400 GT 256MB in general. (explain)

GeForce GTX 465		102592 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 89792 (702%)

Texel Rate

The GeForce GTX 465 should be a lot (about 507%) more effective at anisotropic filtering than the GeForce 9400 GT 256MB. (explain)

GeForce GTX 465		26708 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 22308 (507%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 465 is the winner, by a large margin. (explain)

GeForce GTX 465		19424 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 17224 (783%)

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 maximum amount of data (in units of megabytes per second) that can be moved across the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.