Fed up with pussy clocks in CCC! FVck it! here's what you do. FYI you do not need 6 pin and 8 pin psu dongles connected. Just two 6 pins dongles are fine. 1. If you want to run fan at 100% download and install riva tuner 2.06 and do the following: x:\Program Files\Rivatuner 2.06\rivatuner.cfg Comparing files rivatuner_2.06.cfg and RIVATUNER_2.06_8800GTS_G92_3870X2_RV670.CFG ***** rivatuner_2.06.cfg G86 = 420h-42Fh G92 = 610h-61Fh ***** RIVATUNER_2.06_8800GTS_G92_3870X2_RV670.CFG G86 = 420h-42Fh G92 = 600h-60Fh,610h-61Fh ***** ***** rivatuner_2.06.cfg RV630 = 9588h-9589h RV670 = 9500h-9501h,9505h,9507h ***** RIVATUNER_2.06_8800GTS_G92_3870X2_RV670.CFG RV630 = 9588h-9589h RV670 = 9500h-9501h,9505h,9507h,950Fh ***** edit your rivatuner.cfg so it looks like the bottom entry, the important line is the rv670 one for you. Open notepad as Run as Administrator, open the rivatuner.cfg in x:\Program Files\Rivatuner 2.06, edit the RV670 line so it looks like this: RV670 = 9500h-9501h,9505h,9507h,950Fh save it close and restart riva tuner 2. Download amd gpu clock tool here: http://www.nordichardware.com/skrivelser_img/516/AMDGPUClockTool_v0.7.zip You will need to apply this patch to the root in AMD gpu tool before running the program. here: http://www.nordichardware.com/skrivelser_img/516/ToolLib.zip 2. run AMD GPU clocktool, see on device - BN:3, DN:0 = GPU1 and BN:4, DN:0 = GPU2... BN:3, DN:0 = GPU1 BN:3, DN:0 = GPU1 will show default clocks(825/900) 3. select Bn4 core and type in your gpu and mem clocks and hit apply. then select the second Bn3 and do the same. Check your clocks by opening the thermal sensor tab and hit start. it will show current clocks for both gpu's and mem 4. next try to max out each core and mem by overclocking one slighty higher than the other core and running a benchmark like 3dmark 2006. if it fails then you will know which each core maxes out so you can get the optimal performance from the card. Do the same for the memory.