The Guru of 3D published a review on the MSI GeForce GTX 950 Gaming + 2-way SLI
A quote from the article:
In this article we put the MSI GeForce GTX 950 Gaming edition to the test. A mainstream graphics card is armed with a GM206 Maxwell generation graphics processor from Nvidia. The product performs quite well in the 1080P area. Also the MSI card offers a nice factory tweaks and combined with AfterBurner we took the GPU towards 1575 MHz !MSI GeForce GTX 950 Gaming + 2-way SLI review @ Guru3D
The new GeForce GTX 950 is a cut-down version of the GM206 GPU that Nvidia uses in their GTX 960 series. This revised chip has a lower number of shader processors, a 128-bit wide memory bus and thus 2 GB of GDDR5 memory. The product has been castrated and stripped of everything that is sexy with the GTX 960/970/980. For the 'normal' models you have been able to see the memory cut down to 2 GB of memory on these puppies, that memory runs on a 128-bit wide bus, the shader processors have been cut-down to 768 Shader/Stream/Cuda cores.
So yes, this is the value segment we are now reviewing. The 128-bit wide bus sounds like a nag but the Maxwell GPU architecture makes efficient use of memory color compression. Maxwell, yes, named after the mathematical physicist. The Maxwell family of GPUs is actually the 10th generation of GPU architecture for Nvidia. With several design goals in mind (higher performance and lower power consumption) Nvidia was hoping to reach 20 nm by the time their high-end product would be released. It is now 2015 and it is abundantly clear that the 20 nm fab nodes are a huge yield mess, as no manufacturer dares to use it. Nvidia went with plan B and stuck with a 28 nm process, future products will jump to 16 and 14nm, of course. Nvidia has moved forward and today the 4th Maxwell based product (GTX 750 was actually the first trial run) is being released as a GM206 based GPU. Armed with voltage, power and load limiters, Nvidia these days can harvest massive performance out of chips when you think about it. Today is about the GeForce GTX 950 range of performance.