Firstly to get the pin part of the question sorted. Most PSU's use the 20 pin and 4 pin connector setup so that is normal and the Voltage and Wattage that is supplied depends on the actual PSU its self not the amount of pins. In most PSU's the Voltage is 12V which is what your's, and many other motherboard's require that is also not to worry about.
Now on to the part i feel is causing you an issue. I take it by 95W you mean 950W as they don't make 95W PSU's as that wouldn't be enough power even to boot up a PC, so i will make that assumption and continue. If with that PSU you are havign power supply issues there are two things that could be happening. One you could have a damaged PSU, to put this out the equation i suggest sending back the PSU and requesting another if that ones fails also you know its not this the chance of having two faulty PSU in a row is almost zero.
The second thing that could be happening is that your motherboard doesn't support that high wattage if you do have a 950W PSU that is a huge amount of power being delivered and the motherboard may not like that. I know my old PC had a automatic shut off limit to the wattage of the PSU supply. The limit on that motherboard was 500W, i don't know hat it is for yours. But yours may be similar, if this is the case you can either buy a lower Wattage PSU i suggest 500W or a higher spec motherboard, which in the long term would be best.
Really my best advice is to request a replacement PSU then if that fails also get a new motherboard if you have a limit of 500W any future hardware you add in is almost guaranteed to not work, as the power supply needed by new hardware is rapidly increasing.
If you have any more questions, or if i have not made sense somewhere or failed to answer a part of your post. Do write back and i will get right on answering it for you.
I did type this on my portable device so if its hard to read ofr has grammatical mistakes that's why.
Windows 7 Pro, Intel Core 2 Duo 2.8Ghz, 4GB DDR3, Dual nvidia SLI 9800GT 1GB, 1.5TB Hard disk, OS installed on solid state drive