GeForce GTS 450 1GB vs GeForce GTX 970

Intro

Compare that to the GeForce GTX 970, which uses a 28 nm design. nVidia has clocked the core frequency at 1050 MHz. The GDDR5 memory works at a speed of 1750 MHz on this particular card. It features 1664 SPUs as well as 104 Texture Address Units and 64 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTS 450 1GB		106 Watts
GeForce GTX 970		145 Watts
	Difference: 39 Watts (37%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 970 is 288% faster than the GeForce GTS 450 1GB in general, due to its greater data rate. (explain)

GeForce GTX 970		224000 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 166272 (288%)

Texel Rate

The GeForce GTX 970 should be much (more or less 336%) better at texture filtering than the GeForce GTS 450 1GB. (explain)

GeForce GTX 970		109200 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 84144 (336%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 970 is the winner, by far. (explain)

GeForce GTX 970		67200 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 54672 (436%)

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 information (in units of MB per second) that can be moved past the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.