There is no VCORE voltage settings in my BIOS???HELP!

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aikor

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I have an ASUS m5a78l-m lx plus..i OC my FX 8300 to 4GHZ and when a game loads the game freezes and BSOD comes up so i knw its cause the voltage is low..and also my temp of CPU is goood.

So i went to BIOS and instead of CPU VOLTAGE..there is CPU OVER VOLTAGE!!What is that?? Also its set to Auto and when i increase it it starts from 0.8375 as far as i remember and when i increase it..it increses slowly..and it gets like 5mins to get to 1.0V..so whats Over voltage? And how much should i adjust it
 
Solution
Vexillarius
There's a whole bunch of forum threads of people OC'ing on this board, they all use CPU Overvoltage to set VCore: https://www.google.com/search?q=m5a78l-m+lx+plus+cpu+overvoltage&ie=utf-8&oe=utf-8&gws_rd=cr&ei=YVmMVJaHNIXYavrRgcAD
If you want to make sure, set it to 1.31V and see if that changes the VCore reading in HWMonitor.

Don't make 0.08V jumps though! See how far the CPU will go on stock VCore first, then add ~0.01V at a time and keep a close eye on your load temps. A big jump will make temps skyrocket, it's not safe until you get to know the system's thermal margins.
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Vexillarius

Vexillarius

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From the sound of it it's VCore offset. What are your options aside from auto, a fixed value?

Voltage usually increases with load, but you can try turning off all C-states, SpeedStep and other power saving options.
You can also adjust your power plan in Windows, Control Panel -> System and Security -> Power Options -> Change Plan Settings (select your current plan) -> Change Advanced Power Settings -> Processor Power Management: set min and max to 100.
 
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aikor

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As i said it starts from 0.8375 and goes on like 0.8570,0.8690.. like tht so idk how much i should put it to..

 
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Vexillarius

Vexillarius

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Oo now I understand, I thought it took a while for the actual voltage to increase after you set it in the BIOS. My bad.

It's not an offset then. Leave everything at stock (including the multiplier), run HWMonitor or HWiNFO64 and look at the VCore reading. That's your starting point. If, for example, it's at 1.3V then you put CPU Overvoltage at 1.3V and start overclocking from there. If what you put into the BIOS is different from what HWMonitor/HWiNFO detect by a good margin then you may want to play around with LLC to line things up.
 
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aikor

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I checked the CPU VCORE usin HWMONITOR..its around 1.25 to 1.3V at 3.8GHZ..are u sure tht the over voltage settings is the same as VCORE settings?? because it takes a lot of clicks on the plus key button to get to 1V...if so then i should change to abt 1.38V?
 
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Vexillarius

Vexillarius

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There's a whole bunch of forum threads of people OC'ing on this board, they all use CPU Overvoltage to set VCore: https://www.google.com/search?q=m5a78l-m+lx+plus+cpu+overvoltage&ie=utf-8&oe=utf-8&gws_rd=cr&ei=YVmMVJaHNIXYavrRgcAD
If you want to make sure, set it to 1.31V and see if that changes the VCore reading in HWMonitor.

Don't make 0.08V jumps though! See how far the CPU will go on stock VCore first, then add ~0.01V at a time and keep a close eye on your load temps. A big jump will make temps skyrocket, it's not safe until you get to know the system's thermal margins.
 
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aikor

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Thanks il try it XD..btw is there any software i can use to test the stability of the CPU for overclocking?
 
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Vexillarius

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There is, and stress testing is absolutely required when overclocking. For your CPU I'd use Prime95: http://www.mersenne.org/download/#stresstest

The Small FFTs test is best for testing max temps, Blend is best for testing long term stability.

Overclocking basics:
What I usually do is I crank up the CPU multiplier by 1 (or 0.5 for AMD) and run a stress test for about 20 minutes. If the temps are okay and there's no crashes or errors I up the multiplier by another 1 or 0.5 and try again.
When it inevitably does fail I up VCore by 0.005V or 0.01V (if I'm in a hurry) and try again. Rinse and repeat until I reach the desired frequency or my temps are at their limit, or if the required VCore for stability is too high.
At that point I run a blend test for at least 3 hours (lots of people recommend testing way longer, it depends on how important stability is for your uses). If it passes you can either try again with a slightly lower VCore, or call it a day and declare a successful overclock. If it fails, lower the multiplier by 1 or 0.5 and try again.
 
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aikor

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Hi i used intel burn test since i have it installed..weird thing happend..on idle the CPU VCORE stay at 1.4V on HWMONITOR when i set the cpu over voltage to 1.33V..and when i start the test it drops to 1.2V..why is that??I have cool n quiet mode disabled btw
 
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Vexillarius

Vexillarius

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That's VDroop. A lot of it, in fact. It's a cheap way of protecting the CPU from surges when going from idle to load. You can adjust it with LLC, Load Line Control.

Be very careful when OC'ing with this mobo though. There's no heatsink on the VRM, and its thermal design isn't particularly good. I wouldn't push VCore any higher, and it'd be a good idea to not put LLC at a very high or extreme setting.
 
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aikor

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Oh ya i think. when i put the core upto 1.37V the idle temperature of the mobo pin temp was around 70-75 C in HWMONITOR...but when i tested a CPU intensive game named Beamng which uses crash physics...the temp rises to 80 degrees and again to 79 and in every 10second the VCORE drops to 1.2V causing a huge lag for 3 seconds...is it still cause of the Vdroop..and this is a bad sign right and i should return everything to default??..im pretty scared here
 
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