GeForce GTS 450 1GB vs GeForce GTX 950

Intro

Compare those specs to the GeForce GTX 950, which features a clock speed of 1024 MHz and a GDDR5 memory frequency of 1652 MHz. It also uses a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 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 GTS 450 1GB		106 Watts
	Difference: 16 Watts (18%)

Memory Bandwidth

The GeForce GTX 950 should in theory be quite a bit faster than the GeForce GTS 450 1GB overall. (explain)

GeForce GTX 950		105728 MB/sec
GeForce GTS 450 1GB		57728 MB/sec
	Difference: 48000 (83%)

Texel Rate

The GeForce GTX 950 will be much (about 96%) more effective at AF than the GeForce GTS 450 1GB. (explain)

GeForce GTX 950		49152 Mtexels/sec
GeForce GTS 450 1GB		25056 Mtexels/sec
	Difference: 24096 (96%)

Pixel Rate

The GeForce GTX 950 is quite a bit (about 162%) better at full screen anti-aliasing than the GeForce GTS 450 1GB, and also will be able to handle higher resolutions while still performing well. (explain)

GeForce GTX 950		32768 Mpixels/sec
GeForce GTS 450 1GB		12528 Mpixels/sec
	Difference: 20240 (162%)

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 max amount of information (measured in MB per second) that can be transported past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 can be applied per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.