GeForce GTS 450 1GB vs GeForce GTX 880M

Intro

Compare those specifications to the GeForce GTX 880M, which comes with a clock frequency of 954 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It features 1536 SPUs, 128 TAUs, 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 880M		130 Watts
	Difference: 24 Watts (23%)

Memory Bandwidth

Performance-wise, the GeForce GTX 880M should theoretically be quite a bit better than the GeForce GTS 450 1GB in general. (explain)

GeForce GTX 880M		128000 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 70272 (122%)

Texel Rate

The GeForce GTX 880M is much (more or less 387%) better at texture filtering than the GeForce GTS 450 1GB. (explain)

GeForce GTX 880M		122112 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 97056 (387%)

Pixel Rate

The GeForce GTX 880M should be a lot (more or less 144%) better at AA than the GeForce GTS 450 1GB, and able to handle higher screen resolutions without slowing down too much. (explain)

GeForce GTX 880M		30528 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 18000 (144%)

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 information (in units of megabytes per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video 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 amount of pixels that the graphics chip could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. 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 quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.