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Overclocking - Continuous beeps at startup when OCing over 3.6GHz

Go to solution Solved by _StrikE_,

That beep is the sound of your ram failing, your doing bclk oc so by increasing that value your increasing both the CPU value and the ram value, decrease the ram multiplier and try again.

I recently installed a hyper 212 evo cooler for my i5 750, I am hoping to OC to 3.8GHz. I am able to OC to 3.4GHz without any changes the voltage, but when I try to go to 3.5GHz or 3.6 GHz my computer won't even post and the BIOS makes continuous short beeps (manuals saids it's "power error").


1.310 volts is the highest I've dare to try, but whenever I set my clock to exceed 3.4GHz it won't boot and it gives me the beep codes.


If I go to 1.350 volts or more will that make my computer boot at 3.6GHz? Is it worth the risk damaging my components? Or is 3.4GHz the limit?

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go ahead. anything under 1.375-1.4 V on air is safe

but make sure temps are in check

Rigs I've Built

The Striker i5 4590 @ 3.7 ||  MSI GTX 980 Armor X2 || Corsair RMX 750 || Team Elite Plus 8 GB || Define S || MSI Z97S SLI Krait

The Office PC i3 4160 @ 3.6 || Intel 4600 || EVGA 500B || G.Skill 8 GB || Cooler Master N200 || ASRock H97M Pro4

The Friend PC G3258 @ 4.3 || Sapphire R9 280X Tri-X || EVGA 600B || 8 GB Dell Ram || Cooler Master N200 || ASRock H97M- iTX/ac

The Mom Gaming PC A10-7890K @ 4.4 || iGPU + ASUS R7 250 ||  8 GB Klevv DDR3-2800 Mhz



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I do want to clarify that the reason my computer is posting is because I am giving it too little voltage for the clock speed? It's not that I've hit the bad end of the silicon lottery or my processor is old?

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There is no "limit" in overclocking, at least not a solid one. Just increase the voltage if you experience crashes and go up until you reach temperatures that are too high for comfort. If you got the bad end of the silicon lottery then you will just need higher voltages (and therefore have higher temperatures) to achieve the same overclock.

I've built 3 PC's, but none for myself... In fact, I'm using an iMac that my dad bought for me as my desktop. Awkward...

Please don't say "SSD drive." By doing so, you are literally saying "Solid State Drive Drive" and causing my brain cells to commit suicide. The same applies to HDD (Hard Disk Drive) and PCIe (Peripheral Component Interconnect Express).

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So I bumped my voltage to 1.375 volts, according to CPU Z, I then overclocked from 3.4GHz to 3.5GHz and I still got the continuous beeps when I tried turning on my pc. The Auto setting in my BIOS set voltage at 1.290 for 3.4GHz.


Is there another setting I need to adjust?



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I don't think I even increased the RAM speed, I don't need more RAM speed. I heard that Gigabyte board underclock RAM, but i don't see how it effects the processor. I can post BIOS pics if it helps.

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That beep is the sound of your ram failing, your doing bclk oc so by increasing that value your increasing both the CPU value and the ram value, decrease the ram multiplier and try again.

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Hey I had the System Memory Multiplier at 8x, switch it to 6x and it boots at 3.5GHz!!!


What about voltage? My mobo has an Auto setting for voltage, do I just do 15 min stress test to check for stability?


At 3.4 and 3.5GHz it set voltage at 1.290V, when I bumped it to 3.6GHz it went up to 1.360V

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Its best to find the best voltage settings on manual for your self, though 1.36v is good for finding your sweet spot, so what i mean is this:


set vcore voltage to manual and set it to 1.36v and play with the frequency and voltages based on your needs and what you find to be stable, if you want to play it safe don't go above 1.4v, when doing stress tests use hwmonitor to see temps just in case. Btw if your satisfied with your current OC you can just leave it alone and manually decrease the voltage until you find instability. No sense running more voltage then you have to in the CPU, but another personal preference is when i do find the minimum stable value to add an extra +0.02 or +0.03v to it for proper performance, for instance even if my G3258 was stable at 1.32v it was not able to use its full potential (had ocasional stutters), i upped it to 1.35v and it runs perfectly.

Also after your done with the cpu if you want you could tighten the memory timings  a bit as well.


 As for a general guide line people usually use prime95, OCCT or intel burn test for 2 to 24 hours to check for stability ( the longer the better is the usual standard). Personally i prefer to do it differently:



1 to two Hours. 


Basically here is how i do stability tests for OC:


Initial tests to see if i can keep going with the OC i usually go with 15 minutes of prime95.

After i got the results i wanted i do this:


-15 minutes of Prime95

-close pc for 10 minutes

-open PC do some real application stress testing:


This test is mainly for testing how stable are the 2 most used cores/threads:


i usually use PCSX2+ Zone of The enders 2 in a heavy stage, Usually in 10 to 15 minutes this crashes rather easily, if there's instability.


For PC gaming the Crysis 3's skybox test that Luke keeps mentioning is a nice one to. I had a bunch of other games good at detecting it, but they are rather old now, so i don't think they are relevant any more.


-After this i use Cinebench x6 consecutively


-Prime95 for 2 hours


-Leave PC closed over night for about 6 to 8 hours.

-then either in the morning or when getting back from work i do another 2 hours of Prime95, OCCT (1-2 hours) IBT 30 to 1 hour.


I believe that rather then focusing on continuous stress testing (which just puts needless constant strain on the CPU) having a more random attack on the CPU (or making it go up and down sort to speak), while in different states and scenarios, gives better results in viewing stability, i literary had an OC resist after 8 hours of stress test only to crack after the first restart. 


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Undervolting won't damage anything, on the contrary the less voltage the better, but i'd be surprised if you can run it stable like that :p.

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