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CPU/NB at 2600mhz suddenly wont post.

post #1 of 20
11/9/12 at 7:00am
Thread Starter 
Hi, well I bought one new case fan today and mounted it at the Top, and sleeved the cpu wires with some thick black tape. First it booted just fine, it post fine also on restart from windows. The only way it wont post is if I shut the pc down completely and try to start it up again then my memOK will just stand there and be red. But if I go to 2400mhz I wont have that problem it will just work fine, but the weird part is 2600mhz worked fine for 2 days without a problem until I mounted a new case fan at the top LOl? i also tried to incease the voltage to 1.35v on cpu/nb, had 1.25v before, didnt work either, could it be a psu problem? even do I dont think it is, or my mobo is just lawl?

I got a Asus M5A97 PRO
Corsair vx450 ( This PSU is underrated and its actually a seasonic 550w psu)

peace yao
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post #2 of 20
11/9/12 at 7:12am
It's similar to the S12 II seasonic unit but not exactly the same, it's still not rated for 520w.

However we digress from your issue. It personally sounds as though you might have knocked something as you were fitting the fan, the easier way to check if you're overloading is pull the fan out and a few other un-essential components and try again (hard drives, DVD drives etc)

C
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post #3 of 20
11/9/12 at 7:24am
Thread Starter 
Na it was easy to install the fan, nothing was broken or so. Also also I use a SSD and dont use a DVD drive either, it was just install fan then it suddenly stop working.

Can it be due do all my 3-4 pin slots are full? I had one 3 pin slot not used before installing the fan. It works fine at 2400mhz but wont post ONLY at cold boot restart at 2600mhz, oh well I guess I have to keep it at 2400mhz then sigh...

I will try later to use 1 case fan to be connected to directly to the psu and leave one 3 pin slot like before and see if that do anything lol.
Edited by Denebz - 11/9/12 at 7:27am
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post #4 of 20
11/9/12 at 7:30am
Quote:
Originally Posted by Denebz View Post

Na it was easy to install the fan, nothing was broken or so. Also also I use a SSD and dont use a DVD drive either, it was just install fan then it suddenly stop working.
Can it be due do all my 3-4 pin slots are full? I had one 3 pin slot not used before installing the fan. It works fine at 2400mhz but wont post ONLY at cold boot restart at 2600mhz, oh well I guess I have to keep it at 2400mhz then sigh...
I will try later to use 1 case fan to be connected to directly to the psu and leave one 3 pin slot like before and see if that do anything lol.

It might be an idea to get some Molex converters.... Either that or a cheap fan controller which would look quite nice as well.

Comps
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post #5 of 20
11/9/12 at 7:30am
unplugged the newly installed fan and see if problem still exists. if it does, then it is something else.
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post #6 of 20
11/9/12 at 2:50pm
Thread Starter 
Yeah still same problem, what can the problem be lol, the only thing i did was install a fan lol! anyway im fine at 2400mhz. Gonna try later 1.375v for cpu/nb seems kinda high but yeh,...its weird that 1.25v worked just fine before lolz..
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post #7 of 20
11/11/12 at 11:29am
Thread Starter 
I fixed the problem but it was fixed in a super weird way. I just simply disabled APM and pcie spread spectrum then it boots just fine at 2600nb. Do anyone know why this setting fixed the cold boot for 2600nb? Without doing this I would get MemOK red it would just stand there, I dont excatly know tho if it was APM or pcie spread spectrum.
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post #8 of 20
11/12/12 at 2:33am
Even though it posts, your overclock is unstable. prime blend for 3 hours to confirm, then get back to work on it.
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post #9 of 20
11/12/12 at 5:25am
Thread Starter 
Im pretty sure nothing is unstable I had 3.8ghz 1.368v with 2400nb 1.2v alot for a weird with lots of testing, the only thing it crashed on me was with 2600nb 1.25v that would give me the MemOK red on cold reoboot only. As soon as I disabled APM and pcie spread spectrum now it works perfecly fine. I just dont know after so many tweaking with voltage and stuff, why would APM and pcie spread spectrum fix this.
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post #10 of 20
11/12/12 at 5:38am
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As I understand it APM will allow each individual core to run at higher specs as long as the cpu remains with in the TDP. However I have found that the APM really sucks, it also limits your voltage if it feels that your CPU is above the TDP. I found that even though my CPU temps were around 45*C at load and my vcore was only 1.32v it would set the voltage back to normal and drop my frequency to 2.8 from 3.5 . Not sure about the spread spectrum, anybody else for help would be great.



(Edit: I am undervolting my 8320 by the way and not overclocking at all.)
Edited by mayford5 - 11/12/12 at 8:27am
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