If it was possible it would have shown up.

HWInfo64 gives a VRM temp reading.  Not sure how accurate it is, but it is there although no one ever says so.  GPU-z doesn't show it.
 
All temps show slightly different.  I only have Card 1 enabled right now, (No SLI) because I was only playing a game of CSGO.  The VRM temp on Card 1 is higher than the others, so I would give it a little credit.
 
So, give that a try.  If it works, we can stop telling people that there isn't a way to monitor the VRM temps.  
 
http://www.hwinfo.com/download.php there is a link to it.
 
 
 
 
 
 
 
*addition, There will be a LOT more that shows there, click the first unwanted thing, roll down to the last unwanted thing (do not select stuff you want, of course) press shift and click there, then right click and hide.

That may be it actually.  Which cards are you on now Sajin?  I thought I saw the 4 way Titan X thread.  Am I thinking correctly?

Yeah, I have a 980TI hybrid and no VRM temps. Which sucks because I'd like to know what they are so I can fine tune the reference blower fan. My 780 Classy does have VRM temp monitoring though.