GeForce GTX 460 1GB vs GeForce GTX 560

Intro

Compare all of that to the GeForce GTX 560, which comes with a clock speed of 810 MHz and a GDDR5 memory frequency of 1001 MHz. It also makes use of a 256-bit memory bus, and makes use of a 40 nm design. It features 336 SPUs, 56 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 560		150 Watts
GeForce GTX 460 1GB		160 Watts
	Difference: 10 Watts (7%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 560 will be 11% quicker than the GeForce GTX 460 1GB overall, because of its greater data rate. (explain)

GeForce GTX 560		128128 MB/sec
GeForce GTX 460 1GB		115200 MB/sec
	Difference: 12928 (11%)

Texel Rate

The GeForce GTX 560 is a small bit (more or less 20%) more effective at AF than the GeForce GTX 460 1GB. (explain)

GeForce GTX 560		45360 Mtexels/sec
GeForce GTX 460 1GB		37800 Mtexels/sec
	Difference: 7560 (20%)

Pixel Rate

The GeForce GTX 560 is just a bit (approximately 20%) more effective at AA than the GeForce GTX 460 1GB, and also capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 560		25920 Mpixels/sec
GeForce GTX 460 1GB		21600 Mpixels/sec
	Difference: 4320 (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 maximum amount of data (measured in megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.