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Anyone else got their 555 @ 4.5ghz or more?

post #1 of 16
Thread Starter 
Hello OCN'ers i am wondering if anyone else has managed to get their phenom II 555 @ 4.5ghz or more, i want to go for 4.6 or 4.7 on air but i need the experience of anyone who has done it before.

Any help would be appreciated.
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post #2 of 16
If on air means hang your computer out of the window in -20c then I think it might be possible ;p
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post #3 of 16
Quote:
Originally Posted by Nikkopo View Post
If on air means hang your computer out of the window in -20c then I think it might be possible ;p

Nonsense my freinds rig I built him has a x810 at 3.8 with 1.55 vcore and hyper 212 his load barely gets over 50c.

4.5 is doable.
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post #4 of 16
3.8 to 4.5+ is a huge difference. Not going to happen on air, sorry. Not with any stability anyway, and be lucky to even get it past BIOS post. Will hit a wall @ 4ghz + most likely. Ph II's don't like much higher unless extremely cold.
Edited by Strat79 - 1/19/11 at 1:17pm
post #5 of 16
Quote:
Originally Posted by Strat79 View Post
3.8 to 4.5+ is a huge difference. Not going to happen on air, sorry. Not with any stability anyway, and be lucky to even get it past BIOS post. Will hit a wall @ 4ghz + most likely. Ph II's don't like much higher unless extremely cold.

Yea but he already has it at 4.2
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post #6 of 16
Quote:
Originally Posted by Strat79 View Post
3.8 to 4.5+ is a huge difference. Not going to happen on air, sorry. Not with any stability anyway, and be lucky to even get it past BIOS post. Will hit a wall @ 4ghz + most likely. Ph II's don't like much higher unless extremely cold.
Doesn't matter if he has it at 4.2 right now - Voltage scaling becomes a factor and the more voltage it takes to make it go faster, the more heat you'll get = Higher temps.
I can also get my 555 BE to over 4.2 on air but even on H2O, I've yet to reach 4.5 but I've come dangerously close to doing it (4477MHz).

Unless he has some extremely good ambients to work with, it's not realistic to expect that kind of speed on standard aircooling alone.
Edited by Kryton - 1/19/11 at 1:31pm
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post #7 of 16
Thread Starter 
My ambient temp is 17c and load temps at 4.5 don't cross 44c, with the hyper 212+ in push pull, and it is fully stable even after a full night of testing with OCCT linpack, this is why I wanted to know if anyone has gotten it higher than 4.5ghz.

Some of the guys have suggested that i got a magic chip thats why i can hit 4.5 with 1.56v, i just wanted to know if it is possible to go higher without increasing the voltage cause i know the safe air voltage is 1.55v
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post #8 of 16
Those are some pretty amazing numbers you are pulling if true. Inspired by your post, I pulled a screenshot together. At 20.5°C on a Kestrel 4200, under water with plenty of rad surface area, high flow and fourteen shrouded fans in push/pull on a top end mobo, 4.30 GHz @ 1.55v (LLC to 1.58v) sees a max of 52°C in HWMonitor 1.1.7 under IntelBurnTest 2.5.0 in the first run with a 500/250 underclock on the GTX 580SC in the loop. OCCT Linpack did not go over 42°C in the ten minutes that I ran it (I have other things to do ).



Quote:
Originally Posted by Dillmiester View Post
Yea but he already has it at 4.2
4.2 GHz to 4.5 GHz is a world of difference. My daily clocks are CPU 4.3 GHz @ 1.5125v (LLC typically to 1.55v) and CPU-NB 3185 MHz (stable at 3360 MHz as well) @ 1.4125 (LLC typically to 1.42v). While 4.5 GHz is bench stable for certain marks, it is far from stable with 20°C ambients, even under water with 1.575v applied. My 970 is also stable at 4.2 GHz @ 1.55v, but cannot hit 4.5 GHz with confidence, nor with much stability.




Edited by adamlau - 1/19/11 at 6:51pm
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post #9 of 16
Some batches do up to 4.8 suicide on air. 1043, 1046.

My 1047 isn't as great. But it unlocks fully and this is what it did on cold air



Then DICE



But of course thats all suicide on one core
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post #10 of 16
And that's exactly what is needed for the first of those sick runs: Cold air . Sweet numbers, Slappa. Sometimes I wish I still lived back in the East Coast. Or in Canada. Maybe Greenland. Norway would be nice too.
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