first time overclocking my q6600
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Soldato
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Yer.. fire up prime or intel burntest to stability stress it.. temps seem a little on the low side for that cooler particularly with a Q6600 at 3.6Ghz, also what are you using to measure temps?
Soldato
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You're not conclusively stable yet. Not a 100% guarantee but usually 24hrs prime and say 50 runs (i do 200) of intel burn test/LINX is a fairly good indicator of stability. 1.4v is fine, if cooling is adequate, though i suspect you might shut your PC off quickly when you see LINX or prime starting to drive those temps up with that cooler 
Ideally, you need to load it with the likes of prime/intel burn test. 1.4 vcore is fine on a q6600. Tbh, on the old q6600 i had, the freezer pro only allowed me to get to 3.4ghz, (74c under prime load, 1.3750 vcore). Swapped it out for a Thermalright ultra extreme. This allowed me to reach 3.6ghz, then 3.8ghz prime stable. The freezer is a good little budget cooler, but it will struggle with a q6600 under heavy load.
just tryed intel burn test at 3.4 crashed straight away temps were above 81c,put it back to 3ghz with stock volts and settings its very happy wont go over 3ghz with out upping the volts but intel burn test did complete with out crashing i think i need a better cooler.
3.0ghz on stock is practically a given. To go higher your going to need a more beefier cooling solution. If budget is a concern, you really cant go wrong with the Thermalright ultra extreme. They can be had pretty cheaply secondhand. A great cooler to pair with a q6600.
What were you using to get it to a max of 71C before? The likes of Intel Burn Test,etc do tend to stress the cpu more than "normal use". However most would agree that it's the safest bet on ensuring an oc is both stable and within an accepted temperature.
Just to chuck in further complication to the mix, my Q6600 technically won't do 3ghz at stock volts (vid 1.25v) more than likely due to the vdroop on my motherboard (GA-P35C-DS3R) being approximately 0.1v. It's fine however on 1.3v (1.2v after vdroop).
Soldato
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Yeah the Freezer is a fairly decent sink for mild clocks and quieter operation than the Intel stock, but thats about it.
I found the freezer to be great on a dual core e6600 at 3.7ghz, (my first overclocked cpu). Bad on the q6600, bought a TRUE which done both my 3.8ghz q6600 and q9550. Kept the TRUE on the cpu in sig for a while, before foolishly buying a prolimatech supermega.
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50c idle seems a bit high, What's your ambient temp?
If you dont mind me asking setter, why was it foolish?
is there not much difference in temps? or was there something else?
just curious
1c in favour of the TRUE, (though it was lapped) and it would have allowed me to use 12gb of ocz reaper ram. Im now on 12gb of low profile kingston ram, (3x4gb) timings of 9-9-9-27. My reapers were a very high end 1600mhz 7-7-7-24 kit. With the TRUE i would have had room for 12gb of reapers in a 6x2 config. Though thats harder to maintain a cpu overclock as opposed to 3x4gb. And the supermega cost £70.00 without fans. Thinking of watercooling the cpu now though.