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fixed vs offset

post #1 of 20
Thread Starter 
i am in the process of overclocking my i5 2500k. but one thing i have noticed is that temps are higher when using offset. i mean like 20 degrees higher. so right now i am using a fixed overclock with voltage at 1.25. any ideas why this is the case. thanks
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post #2 of 20
When you used fixed, your processor never downclocks itself when idle, which I'm GUESSING is the reason why your temps are higher (although I can say they shouldn't be 20 degrees higher). Offset will bring your multiplier down when your computer is idle or doing no CPU-intensive work like watching a video.
 
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post #3 of 20
Thread Starter 
so what would you recommend i use for a non 24 hour overclock. right now i have cpu ratio at 40 with voltage at 1.25. temps max out in low 60's. i have a 212 evo heatsink.
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post #4 of 20
The offset value is likely well over the default Vcore, which is why it is so hot. The best way to find out what the voltage is, is to go into the hardware monitoring section of the BIOS and see what the value is. Then change the offset value and save and exit, and go back into the hardware monitoring section again to see how it changed.

And yes, You shouldn't use fixed voltage, as that keeps the same voltage even when the CPU is down-clocked to 1.6GHz for idle mode. Offset mode allows you to set the peak load voltage while still allowing the voltage to go lower when the CPU idles.
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post #5 of 20
i never had higher temps with fixed..fixed negates random freezing..i'd go with fixed :thumb.gif:
umm..i would never recommend sandy bridge for any critical missions :lachen.gif: they always random freeze n stuff :lachen.gif:
seriously though..with fixed voltage..it always stayed cool until i applied a load..
..was very surprising
Edited by Schmuckley - 1/24/12 at 4:11pm
 
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post #6 of 20
Quote:
Originally Posted by Schmuckley View Post

i never had higher temps with fixed..fixed negates random freezing..i'd go with fixed :thumb.gif:
umm..i would never recommend sandy bridge for any critical missions :lachen.gif: they always random freeze n stuff :lachen.gif:
seriously though..with fixed voltage..it always stayed cool until i applied a load..
This is the first time I've heard this. biggrin.gif

It's generally recommended that you use fixed voltage for OC'ing, and when you've found something you're comfortable with, you switch it to offset voltage to gain the benefits of the power saving features. As for my recommendation for a good 24/7, everyday voltage, I'd go with anything less than 1.4v (although I, myself, am comfortable up to 1.45v wink.gif). I recommend 1.4v because that's what everyone else on this forum seems to recommend. thumb.gif
 
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post #7 of 20
Quote:
Originally Posted by onoz View Post

This is the first time I've heard this. biggrin.gif
It's generally recommended that you use fixed voltage for OC'ing, and when you've found something you're comfortable with, you switch it to offset voltage to gain the benefits of the power saving features. As for my recommendation for a good 24/7, everyday voltage, I'd go with anything less than 1.4v (although I, myself, am comfortable up to 1.45v wink.gif). I recommend 1.4v because that's what everyone else on this forum seems to recommend. thumb.gif

This thumb.gif
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post #8 of 20
Does ur board have offset + or - value? U may need to use the - value to reduce the load vcore to 1.25v or close to it. Offset shouldn't have higher temp than fixed, because when the system idle and multiplier (C1E and Speedstep) drop to 16x, the vcore will drop to around 1.000v which give better them than fixed on idle.
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post #9 of 20
Quote:
Originally Posted by mooch49 View Post

i am in the process of overclocking my i5 2500k. but one thing i have noticed is that temps are higher when using offset. i mean like 20 degrees higher. so right now i am using a fixed overclock with voltage at 1.25. any ideas why this is the case. thanks
Quote:
Originally Posted by onoz View Post

When you used fixed, your processor never downclocks itself when idle, which I'm GUESSING is the reason why your temps are higher (although I can say they shouldn't be 20 degrees higher). Offset will bring your multiplier down when your computer is idle or doing no CPU-intensive work like watching a video.


rolleyes.gif OK so who is right?
Edited by We Gone - 1/24/12 at 4:30pm
    
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post #10 of 20
Quote:
Originally Posted by We Gone View Post

Quote:
Originally Posted by mooch49 View Post

i am in the process of overclocking my i5 2500k. but one thing i have noticed is that temps are higher when using offset. i mean like 20 degrees higher. so right now i am using a fixed overclock with voltage at 1.25. any ideas why this is the case. thanks
Quote:
Originally Posted by onoz View Post

When you used fixed, your processor never downclocks itself when idle, which I'm GUESSING is the reason why your temps are higher (although I can say they shouldn't be 20 degrees higher). Offset will bring your multiplier down when your computer is idle or doing no CPU-intensive work like watching a video.


rolleyes.gif OK so who is right?
confused.gif I really have no idea tongue.gif. My post was more to say something like... whaa??? than anything else.
 
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