+1 hardcore-fs

As good as it is, I wouldn't dream of running these clocks with the stock HSF.
Why would you spend so much for a custom heatsink? when you could have just gotten the 7970?
This whole rig only pulls about 1000 watts
clock: 1080/930/1.062v (cgminer will not show proper voltage)
cgminer version 2.8.5 - Started: [November 19, 2012, 9:08 am] Rig:minerwb
minerwb
(5s):3193.71 (avg): 3194.13 Mh/s | H: 118.2 Q:2864 A:69689 R:24 HW:0 E:?% U:44.67/m
TQ:? ST:12 SS:? DW:83 NB:166 LW:140703 GF:3 RF:5
Connected to http://pool.coinlab.com:8332 with LP as user ?
Value:
GPU 0: 73.0C 2733RPM 45% 118 | 638.9/638.8Mh/s | 99% | 1080Mhz 930Mhz 1.17V A:13861 R:1 HW:0 U:8.88/m I: 9
GPU 1: 72.0C 2821RPM 50% 122 | 639.2/638.8Mh/s | 99% | 1080Mhz 930Mhz 1.17V A:14081 R:4 HW:0 U:9.03/m I: 9
GPU 2: 73.0C 2366RPM 39% 112 | 638.6/638.8Mh/s | 99% | 1080Mhz 930Mhz 1.17V A:13950 R:3 HW:0 U:8.94/m I: 9
GPU 3: 73.0C 2747RPM 49% 122 | 638.9/638.8Mh/s | 99% | 1080Mhz 930Mhz 1.17V A:13882 R:4 HW:0 U:8.90/m I: 9
GPU 4: 73.0C 2610RPM 44% 117 | 638.2/638.9Mh/s | 99% | 1080Mhz 930Mhz 1.17V A:13915 R:12 HW:0 U:8.92/m I: 9
Hio and nice setup !

The HSF was bought almost 2 years ago and currently on its 4th gpu.

Soon I will have my 2nd/3rd gpu and they will each get one because, the 30c+ temp drop is worth the $$$.
How much downtime is lost due to overheating/burnt out gear ? per day ? per month ? ect..
Little to no chance of that happening here. lol
pEACe
This rig and miner17 (built together as a 10card, 2mobo, 3psu set up) has been running since feb. Many of my rigs have been running for 1.5 years. all stock HSF, with plenty of fresh air and low clocks.