Max voltage for CPU

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astrofighter122

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Hey guys, I am trying to overclock an FX-8320E with AMD Overdrive, and so far I got as far as 3.8 ghz with 1.2125 volts. What is the max voltage for my CPU? I tried to overclock it further to 3.9 ghz, which is in a setting about 1.2125 volts, and 1.225 volts is the cutoff for the voltage being in the "red" zone. You can find my specs in my signature.
 
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Dude 1.22 volts is awesomely low! Just make sure it's stable by running prime95 for at least 24 hours. The max safe voltage for the FX series is 1.5 volts. I have an FX-8370 a little bit overclocked to 4.3Ghz running at 1.260 volts STABLE. These chips are great undervolters. So yeah! Keep going ahead, voltage won't be a problem. Just make sure your temps are fine :)
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astrofighter122

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The base clock is 3.2 and I'm trying to reach 4.
 
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The_Man12

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Dude 1.22 volts is awesomely low! Just make sure it's stable by running prime95 for at least 24 hours. The max safe voltage for the FX series is 1.5 volts. I have an FX-8370 a little bit overclocked to 4.3Ghz running at 1.260 volts STABLE. These chips are great undervolters. So yeah! Keep going ahead, voltage won't be a problem. Just make sure your temps are fine :)
 
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Dunlop0078

Dunlop0078

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For air cooling and small watercoolers I wouldn't push past 1.42-1.45v or you will likely overheat. All cpu's are diffrent when it comes to how much voltage they will need to hit a certain clock but for 4ghz I would say 1.3-1.35v will do the trick maybe less maybe more. Keep an eye on your temps when changing voltages.
 
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astrofighter122

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Is temperature the only risk?
 
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Dunlop0078

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No, now that I look at your motherboard. 4+1 power phases and no heatsink on the VRM's, I wouldn't recommend you push far past stock voltage on that board or you could risk burning up the VRM's on the motherboard, sorry to say.
 
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astrofighter122

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So how far can I go in terms of voltage and clock speeds?
 
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Dunlop0078

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I dont really know, like I said not far past stock voltage and whatever stable overclock you can achieve at that voltage. If you really want to try it I would try to mount a case fan up so that it is blowing air directly on the area circled below. Do this at your own risk im not sure how well that motherboard will handle an overclock you could shorten the life of the board.

500x1000px-LL-5360b1bc_1000.jpeg
 
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n0ns3ns3

n0ns3ns3

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It would be simpler and more effective to use small ram heatsinks like this
http://www.ebay.com/itm/10Pcs-Gold-14mm-14x14x6mm-Aluminum-Heatsink-Adhesive-For-Memory-RAM-IC-Chipset-/221550582626?hash=item3395719b62:g:TTkAAOSwmrlUsJuB
They will do the job.
Top mounted vents for intake is not a great idea. VRM circuits are designed for high temperatures. So you don't need to worry about that too much.
Just make sure you have a decent airflow within the case and have at least 2 top/rear mounted exhaust fans to remove the hot air from the case and thus prevent heat buildup within the case.
 
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Dunlop0078

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Those VRM's are not designed to take the temps an overcloked and overvolted 8320 would put them through. My VRM's get very hot with 4 more phases than that board and a quite large heatsink. Overclock.net recommends only to overclock that board with adequate cooling and they provide to good ways to cool it I linked it below of your intrested.

http://www.overclock.net/t/946407/amd-motherboards-vrm-info-database

This talks about the importance of having a robust VRM setup when overclocking: http://www.overclock.net/t/943109/about-vrms-mosfets-motherboard-safety-with-125w-tdp-processors
 
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n0ns3ns3

n0ns3ns3

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Any VRMs are designed to hit over 100C ;)
It's just not recommended to have it like this. Putting direct airflow without heatsink will not help enough. Top/rear mounted exhaust fans + heatsinks, will do good enough job in cooling. OC the overclock will have it's limits on this MB. It just the system will become unstable when VRM is overheating. So he will have to lower the voltage before damaging anything (most probably).
 
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Dunlop0078

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And they will probably hit over 100c, I dont see your point. That motherboard has has too few MOSFET's (few and possibly cheap low amperage MOSFETS) and too few power phases to adequately spread out the power and heat of an overvolted 8320. But yes I agree just air cooling for the VRM's may not be enough, heatsinks are a good idea if the OP plans to have that board for a good long while.
 
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