Voltage Drooping Causing Instability

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Woohoopy

Woohoopy

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Jun 8, 2013
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HELP. I'm doing my first overclock and I am using an AMD FX 6350 black edition with an ASUS M5A97 R2.0 motherboard and I'm having problems. I got it up to 4.6 ghz with 1.49 volts stable (kinda) and I raised it up to 4.7 ghz with 1.50 volts and I am stable up until I run prime95 (sounds funny I know but let me get to that). Looking at cpuz, I have 1.5 volts on idle, but whenever I run cpuz I get 1.39 volts MAX. I don't know what to do please help. I think I have every energy perserver turned off but feel free to let me know if you think that's the problem. HELP. If you think that's too high of an overclock maybe but I do know some guys over yonder got it to 5 ghz with 1.52 volts or something so I feel like a failure. Help. I have fallen and cannot get up.
 
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You should be happy with it for now yes. Your motherboard firmware settings may have an option for "Load Line Calibration". This can be used to help adjust the vdroop, but it is absent on most motherboards.

The VRM is what takes the 12 volt supply from your PSU and steps it down to the 1.2-1.5 volt supply used by the CPU. It's done using a programmable SMPS similar to the secondary stage of the PSU itself (but smaller).
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Pinhedd

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Aug 7, 2007
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Voltage droop under load is a consequence of the way DC power is converted and is a function of the VRMs on the motherboard.

Some voltage droop is expected under normal operating conditions and it is necessary to avoid putting the CPU into an unsafe operating region. However, the amount of the droop will increase as the power drawn by the CPU increases and it will increase more visibly on a motherboard that has less robust VRMs.

Asus motherboards typically have outstanding power delivery but your has only a 4 phase CPU VRM and is designed for only 140 watts of power. If you want to go higher, you will need to buy a better motherboard.
 
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Woohoopy

Woohoopy

Honorable
Jun 8, 2013
258
2
10,960
So this is normal right? I should just be happy with 4.6 ghz? And this whole .12 volt drop is out of my control? I'm still pretty oblivious on how this is done and I'm not even sure if I was supposed to increase the (20x) multiplier or the base clock IDK HELP.
 
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Pinhedd

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Aug 7, 2007
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You should be happy with it for now yes. Your motherboard firmware settings may have an option for "Load Line Calibration". This can be used to help adjust the vdroop, but it is absent on most motherboards.

The VRM is what takes the 12 volt supply from your PSU and steps it down to the 1.2-1.5 volt supply used by the CPU. It's done using a programmable SMPS similar to the secondary stage of the PSU itself (but smaller).
 
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