which command line options to set for optimum 7970 performance?
-I 11 for the 7970.
keeping in mind, on windoz you have to go down to 9 to prevent high CPU usage.
also, if you are on windoz, and you want an Intensity above 9, and you have more then 1 card. then you will need to let cgminer have more cores if you have them.
with 5 cards and 1 core, I-11 clock:1125/1000 Mhash will be under 400, and jumpy.
with all cores (I have 4) then you can get the ~650Mh, but CPU usage will be above80% all cores.
I have to run mine at I-9 for now for 2 reasons, 1. my cpu fan crapped. 2. I dont like running at 90%cpu for all cores.
so, for now, I am sacrificing a couple of hundred Mhash using cgminer for the RPC api, worth it to use webmonitor
cgminer version 2.2.3 - Started: [February 11, 2012, 5:36 pm] Rig: minerwb
(5s):3143.86 (avg): 3135.55 Mh/s | Q:707 A:660 R:4 HW:0 E:?% U:43.29/m
TQ:? ST:0 SS:? DW:7 NB:3 LW:0 GF:0 RF:0
Connected to http://gpumax.com:8332 with LP as user ?
GPU 0: 72.0C 3219RPM 52% | 628.8/626.9Mh/s | 1100Mhz 950Mhz 1.17V A:124 R:0 HW:0 U:8.13/m I: 9
GPU 1: 73.0C 3124RPM 55% | 628.8/628.1Mh/s | 1100Mhz 950Mhz 1.17V A:132 R:2 HW:0 U:8.66/m I: 9
GPU 2: 74.0C 3241RPM 52% | 628.8/626.8Mh/s | 1100Mhz 950Mhz 1.17V A:134 R:2 HW:0 U:8.79/m I: 9
GPU 3: 72.0C 2715RPM 48% | 628.8/625.3Mh/s | 1100Mhz 950Mhz 1.17V A:117 R:0 HW:0 U:7.67/m I: 9
GPU 4: 72.0C 3098RPM 51% | 628.8/628.5Mh/s | 1100Mhz 950Mhz 1.17V A:153 R:0 HW:0 U:10.03/m I: 9