GeForce GTX 580 vs GeForce GTX 650

Intro

Compare all of that to the GeForce GTX 650, which uses a 28 nm design. nVidia has set the core frequency at 1058 MHz. The GDDR5 RAM is set to run at a speed of 1250 MHz on this model. It features 384 SPUs along with 32 TAUs and 16 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

GeForce GTX 580		4956 points
GeForce GTX 650		2263 points
	Difference: 2693 (119%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce GTX 580		244 Watts
	Difference: 180 Watts (281%)

Memory Bandwidth

In theory, the GeForce GTX 580 should be a lot faster than the GeForce GTX 650 in general. (explain)

GeForce GTX 580		192384 MB/sec
GeForce GTX 650		80000 MB/sec
	Difference: 112384 (140%)

Texel Rate

The GeForce GTX 580 will be quite a bit (more or less 46%) faster with regards to texture filtering than the GeForce GTX 650. (explain)

GeForce GTX 580		49408 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 15552 (46%)

Pixel Rate

The GeForce GTX 580 should be much (approximately 119%) better at full screen anti-aliasing than the GeForce GTX 650, and also will be capable of handling higher resolutions more effectively. (explain)

GeForce GTX 580		37056 Mpixels/sec
GeForce GTX 650		16928 Mpixels/sec
	Difference: 20128 (119%)

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 largest amount of data (in units of MB per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 applied per second. This figure is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.