I am running them at 930/800/0.937v
downvolt with msiafterburner, close AB start cgminer with conf file.
pulling 830watts at the wall. 3.33 Mh/watt
cgminer version 2.3.6 - Started: [May 10, 2012, 8:52 am] Rig:miner19
(5s):2772.32 (avg): 2759.81 Mh/s | H: 86.8 Q:168959 A:173544 R:927 HW:113 E:?% U:38.07/m
TQ:? ST:143 SS:? DW:5646 NB:424 LW:80863 GF:222 RF:169
Connected to http://gpumax.com:8332 with LP as user ?
GPU 0: 72.0C 2504RPM 42% 114 | 554.3/552.1Mh/s | 99% | 930Mhz 800Mhz 1.17V A:34667 R:190 HW:0 U:7.60/m I: 9
GPU 1: 66.0C 1052RPM 0% 66 | 554.8/552.1Mh/s | 99% | 930Mhz 800Mhz 1.17V A:34859 R:198 HW:0 U:7.65/m I: 9
GPU 2: 72.0C 1184RPM 33% 105 | 554.7/552.1Mh/s | 99% | 930Mhz 800Mhz 1.17V A:34519 R:196 HW:88 U:7.57/m I: 9
GPU 3: 67.0C 1042RPM 0% 67 | 554.0/551.6Mh/s | 99% | 930Mhz 800Mhz 1.17V A:34762 R:171 HW:25 U:7.63/m I: 9
GPU 4: 72.0C 1092RPM 10% 82 | 554.6/552.0Mh/s | 98% | 930Mhz 800Mhz 1.17V A:34737 R:172 HW:0 U:7.62/m I: 9
Are you running all 7970's? What drivers and setup are you using to get windows to recognise all 5 GPU's? Are you using XP/Vista/Windows 7? 32bit or 64bit?
I cant for the life of me get more than 4 gpus going at once.