GeForce GT 230 vs GeForce GTX 660

Intro

Compare those specifications to the GeForce GTX 660, which features a core clock speed of 980 MHz and a GDDR5 memory frequency of 1502 MHz. It also uses a 192-bit bus, and uses a 28 nm design. It features 960 SPUs, 80 TAUs, and 24 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 230		65 Watts
GeForce GTX 660		140 Watts
	Difference: 75 Watts (115%)

Memory Bandwidth

In theory, the GeForce GTX 660 is 276% faster than the GeForce GT 230 in general, because of its higher data rate. (explain)

GeForce GTX 660		144192 MB/sec
GeForce GT 230		38400 MB/sec
	Difference: 105792 (276%)

Texel Rate

The GeForce GTX 660 is a lot (approximately 791%) better at texture filtering than the GeForce GT 230. (explain)

GeForce GTX 660		78400 Mtexels/sec
GeForce GT 230		8800 Mtexels/sec
	Difference: 69600 (791%)

Pixel Rate

The GeForce GTX 660 is much (more or less 435%) more effective at full screen anti-aliasing than the GeForce GT 230, and also capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 660		23520 Mpixels/sec
GeForce GT 230		4400 Mpixels/sec
	Difference: 19120 (435%)

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 (counted in MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 are applied in one second. This is calculated by multiplying the total amount of texture units by the core speed of the chip. The better 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 could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill 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.