GeForce 9800 GTX vs GeForce GTX 465

Intro

Compare that to the GeForce GTX 465, which makes use of a 40 nm design. nVidia has clocked the core frequency at 607 MHz. The GDDR5 memory runs at a frequency of 802 MHz on this model. It features 352 SPUs as well as 44 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GTX		140 Watts
GeForce GTX 465		200 Watts
	Difference: 60 Watts (43%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 465 should be much faster than the GeForce 9800 GTX in general. (explain)

GeForce GTX 465		102592 MB/sec
GeForce 9800 GTX		70400 MB/sec
	Difference: 32192 (46%)

Texel Rate

The GeForce 9800 GTX is a lot (approximately 62%) better at AF than the GeForce GTX 465. (explain)

GeForce 9800 GTX		43200 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 16492 (62%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 465 is superior to the GeForce 9800 GTX, by a large margin. (explain)

GeForce GTX 465		19424 Mpixels/sec
GeForce 9800 GTX		10800 Mpixels/sec
	Difference: 8624 (80%)

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 max amount of information (measured in MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's bus 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 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 high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This 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 video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on quite a few 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.