GeForce GT 430 1GB vs Geforce GTX 680

Intro

Compare those specifications to the Geforce GTX 680, which features a core clock speed of 1006 MHz and a GDDR5 memory frequency of 1502 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It is made up of 1536 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 430 1GB		60 Watts
Geforce GTX 680		195 Watts
	Difference: 135 Watts (225%)

Memory Bandwidth

The Geforce GTX 680 should theoretically be a lot faster than the GeForce GT 430 1GB overall. (explain)

Geforce GTX 680		192256 MB/sec
GeForce GT 430 1GB		28800 MB/sec
	Difference: 163456 (568%)

Texel Rate

The Geforce GTX 680 is quite a bit (approximately 1050%) faster with regards to texture filtering than the GeForce GT 430 1GB. (explain)

Geforce GTX 680		128768 Mtexels/sec
GeForce GT 430 1GB		11200 Mtexels/sec
	Difference: 117568 (1050%)

Pixel Rate

The Geforce GTX 680 is quite a bit (more or less 1050%) more effective at anti-aliasing than the GeForce GT 430 1GB, and also will be able to handle higher screen resolutions more effectively. (explain)

Geforce GTX 680		32192 Mpixels/sec
GeForce GT 430 1GB		2800 Mpixels/sec
	Difference: 29392 (1050%)

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 (in units of megabytes per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's 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 amount of texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.