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Phenom II X4 955 3.2G OC limit

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February 16, 2010 7:29:08 PM

whats the max speed achievable with a stock cooler?

using default Vcore 1.35.

More about : phenom 955 limit

a b K Overclocking
February 16, 2010 8:43:31 PM

depends on your overall airflow/cable management/ambient temp...

normally it is around 3.5/3.6Ghz
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February 16, 2010 9:20:22 PM

get a corsair h50 and make a sandwich with 3 to 4 120mm fans
a b K Overclocking
February 16, 2010 9:29:04 PM

^What?

3 to 4 fans will kill the performance. 2 would be the best.
February 16, 2010 9:44:18 PM

mine has 3, 1 intake before the radiator, 2 exhaust after the radiator. so it's always cool air going into the radiator and the 2 fans are accelerating to suck the air passing from the radiator so it results to cooler temps you can fit 4 if you choose the slim fans, i could only fit 3 since they're all standard sizes and the addition of a 4th will already hit the pump, unless you add it from outside the case =D





my max temp at full load at this setup goes from 38 - 40c and 30 - 35c at idle
February 16, 2010 9:48:16 PM

^ haha that is pure crazyness. for many reasons, if the two fans sandwiched together are spinning the same speed you will see a %3 to %7 increase in airflow. Thats nothing. you are wasting a fan and taking up space in your case. If they are spinning opposite directions and are building positive pressure (blowing into the cooler) you can see up to a %50 or %60 increase in airflow depending on the design of the fan.
a b K Overclocking
February 16, 2010 9:50:57 PM

Your cooling performance will drop when you add fans except for really thick rads, where the added pressure will help push air through. But if will not increase the amount of air blown through.
a b K Overclocking
February 16, 2010 10:02:00 PM

and the fact that you have a cramped case with all that hardware, remove one of those fans or replace both with a single Delta 150CFM (unless you are into silent PC's =) .....
February 16, 2010 10:14:27 PM

maybe a sandwich with 3 deltas would be better?
a b K Overclocking
February 16, 2010 11:06:30 PM

Doubling up fans next to eachother only decreases performance. Why would you do that?
a b K Overclocking
February 16, 2010 11:07:58 PM

I dont think it will decrease the performance but IMO it is a waste of money and space...the Delta that I posted above pushes 240CFM...
a b À AMD
a c 280 K Overclocking
February 17, 2010 11:48:28 AM

xaviertwav said:
whats the max speed achievable with a stock cooler?

using default Vcore 1.35.


With the stock cooler at stock voltage is 3.6GHz. See the imagen, it's my 955 at 3.6GHz



Now, with a little more voltage and the stock cooler you can get this:

a b À AMD
a c 280 K Overclocking
February 17, 2010 11:51:51 AM

knilbeci said:
get a corsair h50 and make a sandwich with 3 to 4 120mm fans


The H50 is good, but bear in mind that with a watercooling system you also need cooling at least the NB to get a better performance. Now, with a Hyper 212+ you can get the same performance and maybe a better cooling that with the H50.
a b K Overclocking
February 17, 2010 10:08:23 PM

OvrClkr said:
I dont think it will decrease the performance but IMO it is a waste of money and space...the Delta that I posted above pushes 240CFM...


Yeah, it will decrease the performance a little.

All it will do is create more pressure between the fans making it harder to push the air resulting in less airflow. You will also have more turbulence which will make it louder and the added pressure will also lead to a premature failure of the fan. [:jaydeejohn:5]

Imagine
February 17, 2010 10:12:33 PM

I've learned something today.... My dream of a 120mm 4 fan stack on a hyper 212+ is gone as soon as you said it will drop performance :( 
a b K Overclocking
February 17, 2010 10:19:37 PM

lol, one on each side of the hyper 212 will increase performance.
February 17, 2010 11:24:27 PM

well somebody has to try 3 deltas sandwich to know the result, making assumptions is good but knowing what really happens is the best ;)  i'll post the result of my experiment as soon as i get those deltas, gotta find the cheapest online store first, it's expensive on newegg :( 
a b K Overclocking
February 17, 2010 11:56:30 PM

knilbeci said:
well somebody has to try 3 deltas sandwich to know the result, making assumptions is good but knowing what really happens is the best ;)  i'll post the result of my experiment as soon as i get those deltas, gotta find the cheapest online store first, it's expensive on newegg :( 


Use common sense, it does not matter if 3 deltas will help by pushing 3% more air vs a single fan, 3% is nothing ... 240CFM is waaay more than what you need unless the CPU you are using can actually go above 4.6Ghz. Once Air or Water can no longer take the heatload it is time for Dice or any other similar cooling method ;)  ...
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