After overclocking fx 8350, computer turns off then back on again at startup

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A

a computer

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Jul 8, 2014
15
0
4,520
I overclocked my fx 8350 to 4.7ghz (increased the multiplier to 23.5 from 20) recently on a Gigabyte 990 fxa ud3 mobo. The voltage is at 1.404V, and prime95 temps are in the low 60s/ high 50s. The only problem with the overclock seems to be that when I restart the computer, it starts to turn on, turns off for 3 seconds, and then starts up again. There are no problems once the computer has started.

Even after reducing the voltage and multiplier, the startup problem persists. The only way to fix this problem is to disable unlocking in the mobo bios.

Does this startup problem harm my computer? (Should I even bother fixing it?)

Is there any way to stop this from happening at startup?
 
Solution
A
I think I solved my problem. As I said, just enabling cpu unlock in the bios triggered the problem. So I tried increasing the multiplier and voltage without enabling the cpu unlock, and it worked. I thought the frequency wouldn't increase, but cpu-z confirms that I am at 4.7 ghz.

I have no idea what the point of cpu unlock is in the bios, but whatever...

Thanks a lot for your help though.

Edit: It previous turned on then off twice. Now it only does it once, but the problem persists. I'll try increasing DRAM voltage and NB core voltage and see if that fixes it. The problem goes away entirely if I decrease the CPU vcore to stock levels, but the overclock is completely unstable at that voltage.

Edit: The problem was completely fixed...
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A

a computer

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Jul 8, 2014
15
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4,520


Being the overclocking newb I am, I was wrong about the OC being stable. I got a BSOD after about ten minutes with prime95. I increased the voltage to 1.428V, and I've been going for about twenty minutes with prime (still running).

I'm confused about the DRAM voltage. The bios said it was at 1.476V, but turning the voltage from auto to manual started increasing it from 1.039V. Should I increase this all the way to 1.5? Could I damage by ram by going above 1.5V?

Also, with prime95 my temperatures are mostly in the high 50's, although they have risen to 69 degrees for a moment. Task manager is showing that my cpu isn't ever running faster than 4.3ghz, but cpu-z is showing that my cpu is running at 4.72ghz. However, both are showing that my cpu is dipping to 3.4 and even 1.4 ghz. My cpu shouldn't be anywhere near throttling at these temps, right? I disabled cool n' quiet in the bios, so that's not the problem.

Edit: Prime has been running for nearly an hour with the same temperatures. I'll keep it running for another 5-6 hours, but I'm pretty sure the overclock is stable. The frequency is dipping because the multiplier is fluctuating below 23.5.

 
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A

a computer

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Jul 8, 2014
15
0
4,520
I don't remember the model number of the kit I bought, but CPU-Z shows that the part number of one of the modules is f3-14900cl9-4gbxl (Ripjaws). I have two of these modules.

Are the fluctuations in frequency normal?
 
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A

a computer

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Jul 8, 2014
15
0
4,520
I increased the DRAM to 1.55V and increased the voltage by another 0.025, it still turned off at startup.
I also noticed that at startup,, my cpu fan was extremely loud before it went back to its normal idle level. This didn't happen when I loaded optimized defaults.
 
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A

a computer

Reputable
Jul 8, 2014
15
0
4,520
I think I solved my problem. As I said, just enabling cpu unlock in the bios triggered the problem. So I tried increasing the multiplier and voltage without enabling the cpu unlock, and it worked. I thought the frequency wouldn't increase, but cpu-z confirms that I am at 4.7 ghz.

I have no idea what the point of cpu unlock is in the bios, but whatever...

Thanks a lot for your help though.

Edit: It previous turned on then off twice. Now it only does it once, but the problem persists. I'll try increasing DRAM voltage and NB core voltage and see if that fixes it. The problem goes away entirely if I decrease the CPU vcore to stock levels, but the overclock is completely unstable at that voltage.

Edit: The problem was completely fixed by disabling cpu unlock and leaving cool and quiet at auto. Although it idles at less than 4.7 ghz because of cool and quiet, it is at 4.7 ghz under load (prime95).
I left NB-core and DRAM voltage at auto.
 
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