GeForce GTX 465 vs GeForce GTX 580

Intro

Compare those specifications to the GeForce GTX 580, which has core clock speeds of 772 MHz on the GPU, and 1002 MHz on the 1536 MB of GDDR5 memory. It features 512 SPUs along with 64 TAUs and 48 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 465		200 Watts
GeForce GTX 580		244 Watts
	Difference: 44 Watts (22%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 580 should be much faster than the GeForce GTX 465 overall. (explain)

GeForce GTX 580		192384 MB/sec
GeForce GTX 465		102592 MB/sec
	Difference: 89792 (88%)

Texel Rate

The GeForce GTX 580 is a lot (approximately 85%) more effective at AF than the GeForce GTX 465. (explain)

GeForce GTX 580		49408 Mtexels/sec
GeForce GTX 465		26708 Mtexels/sec
	Difference: 22700 (85%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 580 is the winner, by far. (explain)

GeForce GTX 580		37056 Mpixels/sec
GeForce GTX 465		19424 Mpixels/sec
	Difference: 17632 (91%)

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 (measured in megabytes per second) that can be moved past the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is calculated 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 amount of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.