Got a missive from PNY technical support:
Thank you for contacting PNY Technical Support.
In reviewing your message, the highest temperature you mentioned 70C is well within operating termperature ranges.
The graphics card can operate normally until 105C, at this temperature GPU slowdown will occur to prevent damage.
Though I find it odd that GPU slowdown would occur at such a high temperature by default.
None the less I'm using EVGA and so we're good to go!
P.s the quadro 4000 doubles up as a decent after work gaming card too, running oblivion at ultra high with graphic intensive mods like qarls textures revisited causes no discernible lag!