GeForce GTS 150 vs GeForce GTX 580

Intro

Compare that to the GeForce GTX 580, which comes with a GPU core clock speed of 772 MHz, and 1536 MB of GDDR5 RAM running at 1002 MHz through a 384-bit bus. It also is comprised of 512 SPUs, 64 TAUs, and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 150		141 Watts
GeForce GTX 580		244 Watts
	Difference: 103 Watts (73%)

Memory Bandwidth

Theoretically, the GeForce GTX 580 should perform quite a bit faster than the GeForce GTS 150 in general. (explain)

GeForce GTX 580		192384 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 160384 (501%)

Texel Rate

The GeForce GTX 580 is just a bit (more or less 4%) more effective at texture filtering than the GeForce GTS 150. (explain)

GeForce GTX 580		49408 Mtexels/sec
GeForce GTS 150		47360 Mtexels/sec
	Difference: 2048 (4%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 580 is a better choice, by far. (explain)

GeForce GTX 580		37056 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 25216 (213%)

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 data (counted in MB per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 are processed per second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock 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 maximum number of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. The number 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 outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.