Well, at the risk of incurring scorn and committing blasphemy, I don't have any SSD in my primary rig. When this Windows 10 mierda golpeado al ventilador, instead of building a new Skylake rig, I decided to turn my Ivy Bridge i3 machine, into a "real computer". (Or reasonable facsimile thereof, anyway). So, I bought a GTX-750ti and a 250GB Samsung "Evo", and began the project.
The 750 replaced the IGP, and obviously, the SSD was to be used for "C:/".
Well, with the SSD, the system, (predictably), booted and launched programs in a heartbeat. However, when the system hit the 2-2GB storage drives, the machine ran about the same as it ever did. I just said "screw it", and put the 600GB WD "Velociraptor" back in.
Well, the V-Rap is pretty speedy, and I'm an old Luddite retiree. The boot time is quite decent, as I always prune the startup programs back to the bare minimum. Since "C:/" is only half of the V-Rap, I use the extra 300GB partitioned for temporary storage. We're still trying to figure out just what to do with the Samsung..
If you want to count the machine I use to, "Win Friends and Gain Confidences" (here), as my "primary", it has a 120GB Sandisk installed as the system drive. (That drive cost me thirty five bucks, Black Friday last). Although, given we're dealing with a G-41 chipset, which is probably set to run the drives as "IDE", I'm not entirely sure how much of an advantage I'm getting from an SSD.