GeForce GTS 150 vs GeForce GTX 950

Intro

Compare all of that to the GeForce GTX 950, which has core clock speeds of 1024 MHz on the GPU, and 1652 MHz on the 2048 MB of GDDR5 memory. It features 768 SPUs as well as 48 Texture Address Units 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 150		141 Watts
	Difference: 51 Watts (57%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 950 should be 230% faster than the GeForce GTS 150 overall, because of its higher bandwidth. (explain)

GeForce GTX 950		105728 MB/sec
GeForce GTS 150		32000 MB/sec
	Difference: 73728 (230%)

Texel Rate

The GeForce GTX 950 should be a little bit (about 4%) better at anisotropic filtering than the GeForce GTS 150. (explain)

GeForce GTX 950		49152 Mtexels/sec
GeForce GTS 150		47360 Mtexels/sec
	Difference: 1792 (4%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 950 is the winner, by a large margin. (explain)

GeForce GTX 950		32768 Mpixels/sec
GeForce GTS 150		11840 Mpixels/sec
	Difference: 20928 (177%)

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 largest amount of information (counted in megabytes per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher 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 maximum amount of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.