GeForce GT 450 (OEM) vs GeForce GTX 950

Intro

Compare those specifications to the GeForce GTX 950, which has a clock frequency of 1024 MHz and a GDDR5 memory speed of 1652 MHz. It also uses a 128-bit memory bus, and uses a 28 nm design. It features 768 SPUs, 48 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 950		90 Watts
GeForce GT 450 (OEM)		106 Watts
	Difference: 16 Watts (18%)

Memory Bandwidth

Performance-wise, the GeForce GTX 950 should theoretically be a bit better than the GeForce GT 450 (OEM) overall. (explain)

GeForce GTX 950		105728 MB/sec
GeForce GT 450 (OEM)		96000 MB/sec
	Difference: 9728 (10%)

Texel Rate

The GeForce GTX 950 is much (more or less 159%) faster with regards to texture filtering than the GeForce GT 450 (OEM). (explain)

GeForce GTX 950		49152 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 30192 (159%)

Pixel Rate

The GeForce GTX 950 will be much (more or less 73%) more effective at anti-aliasing than the GeForce GT 450 (OEM), and able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 950		32768 Mpixels/sec
GeForce GT 450 (OEM)		18960 Mpixels/sec
	Difference: 13808 (73%)

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 (in units of megabytes per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the 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 texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the 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 maximum number of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as 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 - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.