GeForce GT 450 (OEM) vs GeForce GTX 965M

Intro

Compare those specs to the GeForce GTX 965M, which has a clock speed of 944 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It is made up of 1024 SPUs, 64 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
GeForce GT 450 (OEM)		106 Watts
	Difference: 46 Watts (77%)

Memory Bandwidth

The GeForce GT 450 (OEM), in theory, should be quite a bit faster than the GeForce GTX 965M overall. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 32000 (50%)

Texel Rate

The GeForce GTX 965M should be much (about 219%) faster with regards to AF than the GeForce GT 450 (OEM). (explain)

GeForce GTX 965M		60416 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 41456 (219%)

Pixel Rate

The GeForce GTX 965M is a lot (approximately 59%) more effective at anti-aliasing than the GeForce GT 450 (OEM), and also will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 965M		30208 Mpixels/sec
GeForce GT 450 (OEM)		18960 Mpixels/sec
	Difference: 11248 (59%)

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 maximum amount of information (measured in megabytes per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card could 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 clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.