GeForce 9400 GT 256MB vs GeForce GTX 465

Intro

Compare all of that to the GeForce GTX 465, which comes with GPU core speed of 607 MHz, and 1024 MB of GDDR5 memory set to run at 802 MHz through a 256-bit bus. It also features 352 SPUs, 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

Theoretically speaking, the GeForce GTX 465 should perform much faster 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 is quite a bit (approximately 507%) faster with regards to AF 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 superior to the GeForce 9400 GT 256MB, and very much so. (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 largest amount of data (measured in megabytes per second) that can be moved past the external memory interface in one second. It's worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. 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 are 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 better this number, the better the graphics 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 card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.