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2500k Overcloking question.

post #1 of 11
Thread Starter 
Hey,

I been looking through my bios and i notise that when overclocking was using x45 but the intel turbo boost was at 34-37 across the cores, i was just wondering was my CPU downclocking when it started to "turbo boost" or if this is irrelivant and can be disable or should it just be left alone?

would be thankful for any infomation on this feature, if only just to learn about it some more.


many thanks smile.gif
post #2 of 11
34 and 37 are usually the normal stock clocks 34 for normal and 37 with turbo boost.
Are you sure you saved the settings? Did you apply the 45 multiplier to all cores?

Anyways Turbo boost i kind of a energy saving future when you need more power it will boost and when its not needed it will downclock so i would leave it on but it doesn't matter its just what you prefer.
    
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post #3 of 11
Thread Starter 
Well when i boot my PC and go to the properties on mycomputer is says that i got 2500k 3.3ghz 4.4ghz so i think that has saved the clocks and it seems to think that i am at x45 so i think that i am going to leave if aswell smile.gif


thank you for explaining smile.gif
post #4 of 11
If the core current is set too low in the bios then the CPU will downclock under load to maintain a certain power draw and I think 45 is a high enough multiplier to make that start happening. Setting the core current limit to 200 or 250 should put you in the clear.
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post #5 of 11
Thread Starter 
I am not really that advanced in OC so i only really know and understand multipliers. i know what when i set to x45 that my system is unstable and is have probably something to do with my XMP or vcore, but i don't really know enough about Vcore to start messing with it smile.gif
post #6 of 11
Quote:
Originally Posted by HexCore View Post

I am not really that advanced in OC so i only really know and understand multipliers. i know what when i set to x45 that my system is unstable and is have probably something to do with my XMP or vcore, but i don't really know enough about Vcore to start messing with it smile.gif

If you really want to get 4.5 GHz you could start off with a vcore of 1.35 with load line calibration (LLC) set to very high or ultra, whatever the highest setting your motherboard supports. If it's stable then you can start lowering it by negative increments of two until it becomes unstable and then just go back up to the last voltage that you had it stable. I've never ran at 4.5 GHz but 1.35 should be a good starting point I think. If it's not stable at 1.35 then just increase the voltage instead until it becomes stable. Once you think that you're at a stable voltage then run prime95 for 12 hours and if it passes blend with 75-80% of your ram usage in a custom blend stress test. You should be able to get away with everything else on auto unless you see the cpu downclock itself under load. It's best to figure out the stable load voltage before messing with offset voltage. This should get you started if you want to tackle overclocking your CPU.
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post #7 of 11
Thread Starter 
When i am running Coretemp, it often tells me my vcore, i have it set on auto, but i did see it go up to 1.4v and that is with only x41? is it that my cpu is just a difficult one to OC because each CPU handle OC differently?

i also heard that when you increase the V you increase the temp of the mobo, my case has not got very good airflow at the moment, but i have a new case an PSU waiting for delivery.

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just in case you were wondering smile.gif
Edited by HexCore - 3/17/12 at 6:42pm
post #8 of 11
Quote:
Originally Posted by HexCore View Post

Well when i boot my PC and go to the properties on mycomputer is says that i got 2500k 3.3ghz 4.4ghz so i think that has saved the clocks and it seems to think that i am at x45 so i think that i am going to leave if aswell smile.gif


thank you for explaining smile.gif

Oveclocks doesn't reflect in the MY COMPUTER'S PROPERTIES, you need to use CPU-Z
post #9 of 11
Quote:
Originally Posted by HexCore View Post

When i am running Coretemp, it often tells me my vcore, i have it set on auto, but i did see it go up to 1.4v and that is with only x41? is it that my cpu is just a difficult one to OC because each CPU handle OC differently?
i also heard that when you increase the V you increase the temp of the mobo, my case has not got very good airflow at the moment, but i have a new case an PSU waiting for delivery.
aerocool strike X GT
corsair hx850
just in case you were wondering smile.gif

Auto voltage just supplies way too much voltage, that will also increase the heat output. Overclocking will make the voltage regulation modules run hotter, but it's not something you really have to worry about on Intel motherboards. Bad airflow will drastically affect temperatures in a negative way. You should be able to have 4.5 GHz overclock relatively easily though it's just something that you have to play around with for a bit to get perfect. Just throwing voltage at the processor like auto voltage does is not the best solution. Too much or too little will cause instability.
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MCP
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CPUMotherboardGraphicsRAM
Intel 2700K 5GHz ~1.475v Asus P8Z68 Deluxe Gen3 EVGA GTX-1080 (4x8GB) Crucial Balistix 1600 MHz 
Hard DriveOptical DriveCoolingOS
A bunch of disks LG DVD Combo Apogee Xt Rev 1.0, 360 Rad + D5 Fedora 25 
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Windows 10 Acer 32" 4k Acer 32" 4k Wacom Cintiq 27 QHD 
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Xonar DG 
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post #10 of 11
Thread Starter 
Thank you for all your help on this question, sorry for slow replay i been putting my PC into a new case the last couple of days smile.gif
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