GeForce GTX 260 216SP 55 nm vs GeForce GTX 465

Intro

Compare all that to the GeForce GTX 465, which comes with a clock frequency of 607 MHz and a GDDR5 memory frequency of 802 MHz. It also makes use of a 256-bit memory bus, and uses 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 GTX 260 216SP 55 nm		171 Watts
GeForce GTX 465		200 Watts
	Difference: 29 Watts (17%)

Memory Bandwidth

The GeForce GTX 260 216SP 55 nm should theoretically perform a bit faster than the GeForce GTX 465 overall. (explain)

GeForce GTX 260 216SP 55 nm		111888 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 9296 (9%)

Texel Rate

The GeForce GTX 260 216SP 55 nm is quite a bit (more or less 55%) better at anisotropic filtering than the GeForce GTX 465. (explain)

GeForce GTX 260 216SP 55 nm		41472 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 14764 (55%)

Pixel Rate

The GeForce GTX 465 should be a little bit (approximately 20%) more effective at FSAA than the GeForce GTX 260 216SP 55 nm, and also should be able to handle higher resolutions more effectively. (explain)

GeForce GTX 465		19424 Mpixels/sec
GeForce GTX 260 216SP 55 nm		16128 Mpixels/sec
	Difference: 3296 (20%)

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 max amount of information (measured in MB per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at handling 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 chip can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the card's clock speed. 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 rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.