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post #3481 of 8112
I can do 5ghz on my antec 920.

you don't need a custom water cooling loop, Although it certainly helps as you can run a bigger radiator with quieter fans.

Just because i can run at 5ghz doesn't mean i do. I have my chip running at 4.6ghz. Only takes .025 bump to the vcore to do this. To get past 4.8ghz the voltage needs to to + .150. 5ghz takes .175
Temps stay under 60c full load, but those fans are kicking.
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post #3482 of 8112
Quote:
Originally Posted by ebduncan View Post

I can do 5ghz on my antec 920.
you don't need a custom water cooling loop, Although it certainly helps as you can run a bigger radiator with quieter fans.
Just because i can run at 5ghz doesn't mean i do. I have my chip running at 4.6ghz. Only takes .025 bump to the vcore to do this. To get past 4.8ghz the voltage needs to to + .150. 5ghz takes .175
Temps stay under 60c full load, but those fans are kicking.

My 8150 at 4.9ghz would get to 62c in no time on prime and thats with my antec 920 modded with 2 radiators, it really matters on the cpu apperently. Either you dont prime test your overclock or your just lucky. Mine was a launch week 8150 btw
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post #3483 of 8112
That is why i was asking if there was a new stepping out there!! Better OC and less heat!! I think i will take my chances next month biggrin.gif
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post #3484 of 8112
Piledriver can't come soon enough tbh, the heat zambezi produces is pretty disgusting. Any voltage increase sends the temps soaring and makes it a real pain in the ass. The only real walls with this chip are heat walls.

Sandy Bridge ocing was a breeze compared to this crap.
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post #3485 of 8112
please anyone i need help i cannot seem to get round the illegal sumout error please please help i have tryed everything !!!

http://www.overclock.net/t/1209662/fx-8120-illegal-sumout-error-help#post_16364651
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post #3486 of 8112
Quote:
Originally Posted by lloydy View Post

please anyone i need help i cannot seem to get round the illegal sumout error please please help i have tryed everything !!!
http://www.overclock.net/t/1209662/fx-8120-illegal-sumout-error-help#post_16364651

You couldn't be more true..... My other 120mm Fan gave me a crapper the other day, So i'm back to 4.7GHz @ 1.47V..... Anything Above 1.48+.... Is just disgusting nasty heat spike.... I've seen mine personally go to 86 C*, and i Yanked my power cord from the wall when it spiked like that goin for 5ghz on my Antec 620 @ 1.63Volts.... But i will say, it's a REAL Bulldozer and took the punishment fine from what i saw, No damage whatsoever. 4.7ghz is Suffice for what i do, and couldn't ask for anything more from such a chip TBH.
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post #3487 of 8112
4.4ghz is my max overclock no matter the settings. If the voltage goes over 1.408 under load it freezes but I run my cpu 24/7 usually at 4.2ghz and it is plenty fast for my needs. Have 2 VM's running on it with 2 cores each and the main machine is a quad core. My kids old pc and my wifes pc is remoted into the vm's over the network and using the 8120's resources. Its a pretty awesome setup and I am very happy with my cpu. Some people like to hate on us and call us dumb for purchasing our cpu's and I say screw them who are they to say anything on what we decide to buy? As long as we are happy thats all that matters.
    
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post #3488 of 8112
Quote:
Originally Posted by Tslm View Post

Piledriver can't come soon enough tbh, the heat zambezi produces is pretty disgusting. Any voltage increase sends the temps soaring and makes it a real pain in the ass. The only real walls with this chip are heat walls.
Sandy Bridge ocing was a breeze compared to this crap.

Few people seem to have any issues OC'ing the FX CPUs as long as they use a decent HSF. Zambezi produces exactly what it's rated at 125w. When you OC it it's going to draw more power as do all CPUs. How much more depends on how high you OC and how many cores the CPU has. Eight cores is going to ramp the power consumption faster than four cores. Higher voltage also ramps the power consumption and heat. This isn't anything new or different from any other CPU.
post #3489 of 8112
My 8150 at 1.54V 4.9Ghz pulls 350 watts on its own. That is going to take a lot of cooling, even a 2X120 radiator isn't designed to efficiently cool more then about 200 watts. I just placed an order to add a 3X120 radiator to my loop with my existing radiator. The calculations I've looked at seem to think it will be a considerable improvement.
post #3490 of 8112
Quote:
My 8150 at 1.54V 4.9Ghz pulls 350 watts on its own. That is going to take a lot of cooling, even a 2X120 radiator isn't designed to efficiently cool more then about 200 watts. I just placed an order to add a 3X120 radiator to my loop with my existing radiator. The calculations I've looked at seem to think it will be a considerable improvement.

It really depends on what fans your using on the radiator, and then a lot depends on ambient temp. My FX at 5ghz and 1.525 volts is easly over 400watts full load. Granted my FX at with only .025 bump to voltage and 4.6ghz only pulls around 200 watts. Each Cpu is different in terms of its leakage. Also each cpu has its sweet spot in terms of frequency and voltage. General rule of thumb is if you want to overclock the 81XX series processors to their limits you need serious cooling such as High end air cooling or respectable water cooling setup.

Note: To go from 4.6ghz and +.025 cpu vcore to 4.7ghz it takes +.100 volts, 4.8ghz takes +.125 volts. 4.9ghz takes + .150 volts. 5ghz takes + .175 volts. AT 5ghz I am right at 60c full load. Windows will load all the way up to 5.3ghz, but will crash under load.

I run the single Antec 920 Radiator, with its thickness it has about the cooling performance of dual 120mm radiator. It is able to keep the temps down enough to allow 5ghz, but the fans are spinning near full speed and its loud. You are correct though a 3x120 raditor with semi decent fans will be enough for the FX granted your ambient temp isn't crazy high.

Quote:
My 8150 at 4.9ghz would get to 62c in no time on prime and thats with my antec 920 modded with 2 radiators, it really matters on the cpu apperently. Either you dont prime test your overclock or your just lucky. Mine was a launch week 8150 btw

I use prime 95 for stability testing, along with IBT, furmark, and 3dmark 11 loop. You must have a high ambient temp or, well your chip isn't a great overclocker. What is your stock cpu vid?
Edited by ebduncan - 2/5/12 at 12:32pm
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