GeForce 9800 GTX vs GeForce GTX 465

Intro

Compare all that to the GeForce GTX 465, which has a clock speed of 607 MHz and a GDDR5 memory frequency of 802 MHz. It also makes use of a 256-bit memory bus, and makes use of a 40 nm design. It is comprised of 352 SPUs, 44 Texture Address Units, and 32 Raster Operation Units.

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

In theory, the GeForce GTX 465 will be 46% faster than the GeForce 9800 GTX in general, because of its greater data rate. (explain)

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

Texel Rate

The GeForce 9800 GTX will be much (about 62%) faster with regards to anisotropic filtering than the GeForce GTX 465. (explain)

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

Pixel Rate

The GeForce GTX 465 is a lot (about 80%) faster with regards to full screen anti-aliasing than the GeForce 9800 GTX, and will be capable of handling higher screen resolutions more effectively. (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 maximum amount of information (in units of megabytes per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the core 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 also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.