GeForce 9800 GT 512MB vs GeForce GTX 465

Intro

Compare all of that to the GeForce GTX 465, which has GPU core speed of 607 MHz, and 1024 MB of GDDR5 RAM running at 802 MHz through a 256-bit bus. It also is comprised of 352 SPUs, 44 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 512MB		105 Watts
GeForce GTX 465		200 Watts
	Difference: 95 Watts (90%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 465 should theoretically be a lot superior to the GeForce 9800 GT 512MB overall. (explain)

GeForce GTX 465		102592 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 44992 (78%)

Texel Rate

The GeForce 9800 GT 512MB will be quite a bit (about 26%) more effective at texture filtering than the GeForce GTX 465. (explain)

GeForce 9800 GT 512MB		33600 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 6892 (26%)

Pixel Rate

The GeForce GTX 465 is quite a bit (approximately 102%) better at anti-aliasing than the GeForce 9800 GT 512MB, and also will be capable of handling higher screen resolutions while still performing well. (explain)

GeForce GTX 465		19424 Mpixels/sec
GeForce 9800 GT 512MB		9600 Mpixels/sec
	Difference: 9824 (102%)

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 largest amount of data (in units of megabytes per second) that can be transferred over the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory speed. If it uses 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, High Dynamic Range 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 texture units of the card by the core clock 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 in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.