GeForce GTS 450 1GB vs GeForce GTX 970M

Intro

Compare those specifications to the GeForce GTX 970M, which features a clock speed of 924 MHz and a GDDR5 memory speed of 1000 MHz. It also makes use of a 192-bit memory bus, and uses a 28 nm design. It is comprised of 1280 SPUs, 80 TAUs, and 48 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 970M		75 Watts
GeForce GTS 450 1GB		106 Watts
	Difference: 31 Watts (41%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 970M will be 66% faster than the GeForce GTS 450 1GB in general, due to its higher data rate. (explain)

GeForce GTX 970M		96000 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 38272 (66%)

Texel Rate

The GeForce GTX 970M should be a lot (about 195%) faster with regards to texture filtering than the GeForce GTS 450 1GB. (explain)

GeForce GTX 970M		73920 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 48864 (195%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 970M is superior to the GeForce GTS 450 1GB, and very much so. (explain)

GeForce GTX 970M		44352 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 31824 (254%)

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 data (measured in MB per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better 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 are processed in one 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 the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called 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 of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.