hmm..... I'm getting ~27*c with one 156w (xp1333@~1750@2.1v)... (I'm not quite shore if that was100% full load, the system is down for now... probaboly upp this evening...)
the 156w pelt is running on ~15.5 (15.8 is specifided for them)
the waterblock is home made and is 10*c over watertemp, water ~30c (damn small room, get over ~28*c in there, and it's ****in winter outside and no other heating... )
coldblate is 8mm
a pick (without the pelt tho):
edit, two different pics.....