GeForce GT 450 (OEM) vs Geforce GTX 680

Intro

Compare those specs to the Geforce GTX 680, which uses a 28 nm design. nVidia has clocked the core frequency at 1006 MHz. The GDDR5 memory runs at a frequency of 1502 MHz on this card. It features 1536 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
Geforce GTX 680		195 Watts
	Difference: 89 Watts (84%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 680 will be 100% quicker than the GeForce GT 450 (OEM) in general, due to its greater bandwidth. (explain)

Geforce GTX 680		192256 MB/sec
GeForce GT 450 (OEM)		96000 MB/sec
	Difference: 96256 (100%)

Texel Rate

The Geforce GTX 680 will be a lot (approximately 579%) better at anisotropic filtering than the GeForce GT 450 (OEM). (explain)

Geforce GTX 680		128768 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 109808 (579%)

Pixel Rate

The Geforce GTX 680 should be quite a bit (approximately 70%) better at full screen anti-aliasing than the GeForce GT 450 (OEM), and also should be capable of handling higher resolutions more effectively. (explain)

Geforce GTX 680		32192 Mpixels/sec
GeForce GT 450 (OEM)		18960 Mpixels/sec
	Difference: 13232 (70%)

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 maximum amount of data (counted in MB per second) that can be transported over the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock 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 quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.