DFI Infinity 975X/G Bios & Basic Overclocking Advice Needed

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It has run Orthos SP 04 all afternoon at 3300mhz

 

FSB 366 X 9 = 3.3GHZ @ 1.30V + 50.0MV CPU VTT 1.2V DRAM 1.9V PCI-E 101MHZ NB 1.6V

2 X PQI PC2-800 M/4/5/4/14/533/A/A/A/A/A/A/A/A/A/A/A/A/A/A/A/A/NON-ECC @ 1.9V (757MHZ)

 

I cant really push it any harder until I get better cooling & take a good look at the IHS I think it may be concave bye the looks of my temps 75-85oC full load can anyone confirm there temps.

 

I was looking at the Tunic Tower 120 but the thing is so big I am not sure there will be any room left for a decent Northbridge cooler.

 

I was thinking of the Thermalright HR-05 or the SLI version or the one I like the look of the Noctua NC-U6 anyone using any of these items together.

 

The RAM I like the look of is the G.Skill's F2-8000PHU2-2GBHZ can anyone back me up or offer a better set.