GeForce GTX 465 vs GeForce GTX 580

Intro

Compare all that to the GeForce GTX 580, which features a core clock speed of 772 MHz and a GDDR5 memory frequency of 1002 MHz. It also uses a 384-bit bus, and makes use of a 40 nm design. It is made up of 512 SPUs, 64 TAUs, and 48 ROPs.

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

Performance-wise, the GeForce GTX 580 should in theory be quite a bit better than the GeForce GTX 465 in general. (explain)

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

Texel Rate

The GeForce GTX 580 will be much (approximately 85%) better 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

The GeForce GTX 580 should be quite a bit (approximately 91%) better at AA than the GeForce GTX 465, and will be able to handle higher screen resolutions without losing too much performance. (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 data (measured in megabytes per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR type memory, 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total amount of 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 per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines 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 output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.