GeForce GT 450 (OEM) vs Geforce GTX 690

Intro

Compare those specifications to the Geforce GTX 690, which features a GPU core clock speed of 915 MHz, and 2048 MB of GDDR5 RAM running at 1502 MHz through a 256-bit bus. It also features 1536 SPUs, 128 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
Geforce GTX 690		300 Watts
	Difference: 194 Watts (183%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 690 is 301% quicker than the GeForce GT 450 (OEM) in general, because of its higher bandwidth. (explain)

Geforce GTX 690		384512 MB/sec
GeForce GT 450 (OEM)		96000 MB/sec
	Difference: 288512 (301%)

Texel Rate

The Geforce GTX 690 is quite a bit (about 1135%) better at anisotropic filtering than the GeForce GT 450 (OEM). (explain)

Geforce GTX 690		234240 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 215280 (1135%)

Pixel Rate

If using high levels of AA is important to you, then the Geforce GTX 690 is the winner, by far. (explain)

Geforce GTX 690		58560 Mpixels/sec
GeForce GT 450 (OEM)		18960 Mpixels/sec
	Difference: 39600 (209%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved past the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better 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 amount of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the core 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 output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.