Quick question on over clocking i7-4770k

Wally173

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Jun 29, 2014
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Buddy has a HP Envy Phoenix PC what has very limited overclocking in the bios. It has a liquid cooling system on the i7-4770k. In the Bios there are only these options for over clocking with the current values we are using now:

CPU Power Limit1: 95
CPU Power Limit2: 119
1 Core Ratio Limit: 41
2 Core Ratio Limit: 41
3 Core Ratio Limit: 41
4 Core Ratio Limit: 41

From what I have figured out. The Ratio Limits are the multiplier the FSB. basically 41x100 = 4100mhz. I think the Power limit settings are wattage? I know the i7-4770k comes stock at 84w TDP. So I am assuming the Power Limit 1 is the lower limit wattage and from my reading the Power limit 2 should be set to 20-25% above it. Is that correct?

Basically, how do you know what to set the wattage to without underpowering or overpowering it? Is there a rule of thumb for the multipliers and how much wattage? Also what is the absolute max the wattage should ever be set to?

Thanks for you time,

Mike
 
Solution
Auto will increase as it needed and should get you an average oc. Just set the power limits to 500, it really doesn't matter. Idk why you want it to throttle anyways.
It doesn't matter what you set the limit to, it'll only use what it needs. When the limit is reached, the cpu will throttle so usually people just put it to any high number. There's 2 because one should be short term, and the other for long term.
 
thank you for the quick reply. So you are saying you set the limit and if the cpu sucks up that much power it will throttle DOWN and slow down the CPU speed? can you go into detail about short term and long term if at all possible. and finally are you sure it doesn't really matter? it has to be there for a reason, no? since the default for stock speeds of the i7-4770k is 84W can you just leave it at 84W and just increase the overall speed without messing with the watts?

Thanks again for your time and knowledge,

-Mike
 
Without increasing your voltage, the power usage should stay about the same. If you leave voltage on auto, it's raising the voltage itself. The current power limits are above stock settings so I am assuming other settings are on auto so it's changing things on it's own. What the power limit is set to won't increase power consumption, it's just the max before it throttles. The cpu will lower in speed when it throttles. The point of a the power limit is to throttle when you are taking too much power. This came with the addition of turbo. Your cpu at stock speed can go over the power limit (84) in turbo. Long by default should have been 84. Short and long are pretty self explanatory. As you are now, 119w for short, this means the cpu can go to 119w for a short amount of time before it will throttle, stay there for a long time and it will lower to 95w. How long is the short duration? I don't remember off the top of my head. The setting is adjustable for some mobos. You should be able to see the power consumption of the cpu in hwmonitor or other monitoring software.
 
Thanks for the further explanation! The BIOS doesn't offer any voltage settings. It just blew my mind that HP actually had an overclocking section in their BIOs. I have never seen a prebuilt computer have that. What also blows my mind is that this computer ships overclocked from HP. Those settings that I posted are how it came. Also, when you reset BIOS to defaults it resets back to those overclocked settings. Very interesting HP did this, no?

I know without being able to adjust voltage our over clocking will be limited. Should we just stick with these settings which is giving a minor overclock? Is it possible to go any higher without being able to adjust the voltage? Or maybe it is auto changing voltage like you said, no option for voltage to know for sure in BIOS. I will monitor in those programs some more and see if voltage changes auto. If so, how high you think we could go? And if we do go higher just leave the power limits as they are at 95 and 119?

Thanks again for the help, I really appreciate it,

-Mike



 


Ok, thanks for all the help. I really appreciate it!

thanks again,

Mike