GeForce GT 450 (OEM) vs GeForce GTX 970M

Intro

Compare that to the GeForce GTX 970M, which comes with core clock speeds of 924 MHz on the GPU, and 1000 MHz on the 3072 MB of GDDR5 RAM. It features 1280 SPUs as well as 80 TAUs and 48 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 970M		75 Watts
GeForce GT 450 (OEM)		106 Watts
	Difference: 31 Watts (41%)

Memory Bandwidth

Both cards have the exact same bandwidth, so in theory they should have the same performance. (explain)

Texel Rate

The GeForce GTX 970M will be quite a bit (about 290%) faster with regards to AF than the GeForce GT 450 (OEM). (explain)

GeForce GTX 970M		73920 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 54960 (290%)

Pixel Rate

The GeForce GTX 970M is quite a bit (more or less 134%) better at anti-aliasing than the GeForce GT 450 (OEM), and should be able to handle higher screen resolutions better. (explain)

GeForce GTX 970M		44352 Mpixels/sec
GeForce GT 450 (OEM)		18960 Mpixels/sec
	Difference: 25392 (134%)

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 max amount of information (counted in MB per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units of the card by the core clock 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 applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.