Marshmel07 :
hi pete i currently have a corsair vs450 is that ok to use with a gtx 950 strix oc 2gb videocard?
This is a tricky one because of 2 reasons. First, I wouldn't recommend the Corsair VS (or the CX) series....they are far from the worst PSU out there, but they are made cheap with some poorer quality capacitors. However as you already own it, I'm not about to tell you to replace it, but I will say not to push it past 75% of it's rated output.
Ok now for the 2nd part, if we say 330W is the limit of your PSU and a oc GTX 950 can use ~100W, this leaves you with 230W for your CPU, motherboard, RAM, drives and cooling fans. If we allow 50W for everything except your CPU, then we are left with 180W. This is more than enough for most CPUs, unless you have an oc 8 core AMD or something similar.....in which case I would definitely recommend a new PSU.
So yes, in most situations a Corsair VS450 can run a oc 950, however if you want to be really safe, a better quality PSU would be a good investment. This is the PSU tier list most often used
http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html