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***The Official Wolfdale 8200/8400/8500 Overclocking Thread ***

Thats what I said above and someone thought I meant I cant get past 4GHZ, you reach X speed with no volts increase, then get X higher with little increase then you need massive increase after that.

I only stopped at 4GHZ as I am still messing about with other aspects of the Striker II inc new Memory and GPU seems slower.

I have plenty headroom left volts wise even if I limit to 1.45v for safety as Im currenty 1.235v and its may be able to run 4GHZ at a bit lower voltage as not done testing yet.

Im pretty sure Im stable to 3.8GHZ on 1.2v but need more testing.

As I have said all along I am on a 120mm Noctua so not extreme Air Cooling and I did all testing with Case fans at 50% anyhow.
 
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Similar scaling issues heer too. 3.8GHz piece if cake on 1.22V but need 1.35 for 4GHz so not bad but i have seen a lot better.

Any ways heres my highest Super PI to date, Pretty sure my mobo is holding be back so hopefully will be getting new bios as soon as Chinese New Year ends:D

pi-1.jpg


And now some 3DMarks results with my 3870, could probably bench at higher Ghz but not to keen on frying me 8400 just yet

01-2.jpg


03-1.jpg


05-1.jpg


06.jpg
 
got a e8500 from preorder, busy with work so only just got around to overclocking it

impressed so far :) got 4ghz easy, stock volts, just increased fsb to 425

seems stable (touch wood) been running orthos for half hour
 
Dont Panic !!!
Wolfdale temps seem scary at first.

Something i have observed is intriguing they don't appear to have a thermal throttle.
I have tried to find the temp at which throttling starts but i cant.

T Junction is supposed to be at 105 so one would assume that approaching 100 they would have already started to throttle but they dont.

As a test i ran one on the standard heatsink with elevated vcore and coretemp was reporting 115C but still no throttling.

Could it be that the thermal junction is much higher than 105 ?
Is the throttling circuit broken in the 45nm duals ?

BTW
I use the dnet DC client to check for throttling, it has a graph showing core throughput which drops when throttling kicks in.
Makes it easy to observe.
 
Interesting thread khemist, with my mobo my E8500 need about 1.3v just to run at stock and 1.45v to run at 4.38g but needs 1.5v on the NB but with those reports of knackering your chip if you put more than 1.45v through the cpu is concerning. Think we need a definate data base for these chips to say what VC is safe to use etc.
 
dagwoood said:
IIRC, throttling wont occur on these chips until the core temperature is about 20c over the max Tjunction temp. If I find the article, I'll post a link.
Click to expand...

Your getting Tjunction values mixed up with TjMax limits, TjMax refers to the maximum temperature before throttling begins. With TCC active, the clocks will be modulated by alternately turning the clocks off and on at a duty cycle specific to the processor (typically 30–50%). this is when throttling occurs, usually around 5-10C before TjMax. If PCZ did not see this behaviour, one can assume temp readings are incorrect or TCC is not active and his cpu is on its way to a thermal meltdown.
 
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