well yes as you can see your whole system is runing very hot your CPU temp is 64 degrees and the fan is running at almost 5000RPM!!!! you are gunna damage your whole system not just your Grahics card!
(i hope you took these temps under no load what so ever)
PWM im guessing is your card 53 degress is hot
what i would suggest would be to firstly swap cases bye a new one that has pleanty of room and good airflow cheack out www.newegg.com and look for cases style is your own choice but look for things like space for and intake fan (usually 80mm in the front of the case [blowing over the HDD's]) a space for a 120mm fan in the back and pleanty of room to allow good circulation.
i wouldnt suggest buying any new fans at this stage like dont go of rushing to get a heap of fans with extreame heatsinks on them yet. you will be surprised how effective this will hopefully be!
and theres no need for round cables as if yet hold of on those and if the case doesnt work then post back and we can talk some more abotu fans and stuff. its good that you have a 120mm fan coming from newegg cause that can go into your new case
just out of interest what other things do you have in your case at the moment you havent said what mobo you have or CPU?
now as far as your grahics card fan goes that is seriouse DO NOT PLAY GAMES until this is fixed you could damage it beyond repair.
with your card im not sure how we can go about this (replacing the fan) am i right when i say that it has a heatsink on it covering part of the fan and covering the RAM witha heatsink?
if so this will make it alot harder to replace it (im not sure if you can actually)
did you buy this card form newegg? and if so how long have you had it?
no probs about the help!