GeForce GTS 450 1GB vs Geforce GTX 690

Intro

Compare those specs to the Geforce GTX 690, which uses a 28 nm design. nVidia has set the core frequency at 915 MHz. The GDDR5 memory is set to run at a frequency of 1502 MHz on this model. It features 1536 SPUs as well as 128 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
Geforce GTX 690		300 Watts
	Difference: 194 Watts (183%)

Memory Bandwidth

In theory, the Geforce GTX 690 is 566% quicker than the GeForce GTS 450 1GB in general, due to its higher bandwidth. (explain)

Geforce GTX 690		384512 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 326784 (566%)

Texel Rate

The Geforce GTX 690 should be quite a bit (more or less 835%) faster with regards to anisotropic filtering than the GeForce GTS 450 1GB. (explain)

Geforce GTX 690		234240 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 209184 (835%)

Pixel Rate

The Geforce GTX 690 is much (approximately 367%) faster with regards to FSAA than the GeForce GTS 450 1GB, and also able to handle higher screen resolutions without slowing down too much. (explain)

Geforce GTX 690		58560 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 46032 (367%)

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 max amount of information (counted in megabytes per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 can be processed per second. This number is calculated by multiplying the total amount of texture units of the card by the core clock 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 per second.

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