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Need really high voltage to oc....could it be my PSU??? - Page 2

post #11 of 14
I've also been curious about this relating to my own rig.

I'm just using the 400W psu that came with my low end case.

1x HDD
1x DVD
3x 12cm fans (2 case and 1 hsf)
1x 8cm fan

cpu: Sempron 3100+ palermo with Venice core. 2628MHz@1.65V (primed 9hrs+)

under load my 12V rail goes to 11.58, idle it sits at 11.71

not sure if power is reason for instability higher than that or if it's to do with my HT being at 876 MHz on a s754 mobo. (mind you 46% overclock isnt too shabby...but I have seen these chips go higher)
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Hard DriveOSMonitorPower
Seagate 80G SATA Windows Vista RC1 21" Panasync S110i Vortex-500 
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post #12 of 14
Thread Starter 
Quote:
mmm............Load temps of only 40C tells me that you are not getting the vcore to that cpu- unless you are somewhere it is very cold?

Have you all the power cables connected to the mobo? No sus plugs anywhere?

Having only 2 hard disks should be OK surely. To make sure just idle one of them that is not needed and see if it helps. (Trouble shooting here)
well i keep the panels off of my pc case all the time, i live in london so it is kinda cold...and my Bt is lapped pretty nicely, used with a tiny bit of AS5...yup all of the power cables are connected...and im not sure of what you mean by sus plugs....if you mean sus as is dud plugs like faulty...im not sure, how can i check this??
btw thanks for all the help guys
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CPUMotherboardGraphicsRAM
4790K delidded @4.9ghz Asus Z97 Deluxe Wifi EVGA GTX 980 SC 2 x 8GB Corsair Vengence 2400 
Hard DriveOptical DriveCoolingOS
Crucial MX200 250gb + 1tb Lg Bluray EK Supreme, TC PA120.3, D5 Vario, San Ace Windows 7 Ultimate  
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32" LG7000 1920x1080 Logitech S510 XFX 650Watt XXX Modular Edition Custom Modded 
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Logitech S510 Mission M74 Denon PMA 355 
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post #13 of 14
Quote:
Originally Posted by TedSexington
I've also been curious about this relating to my own rig.

I'm just using the 400W psu that came with my low end case.

1x HDD
1x DVD
3x 12cm fans (2 case and 1 hsf)
1x 8cm fan

cpu: Sempron 3100+ palermo with Venice core. 2628MHz@1.65V (primed 9hrs+)

under load my 12V rail goes to 11.58, idle it sits at 11.71

not sure if power is reason for instability higher than that or if it's to do with my HT being at 876 MHz on a s754 mobo. (mind you 46% overclock isnt too shabby...but I have seen these chips go higher)

As you may Know the PSU really is the Most important part of your system especially when in an overcloking situation. What ae your Amps on your 12v rail like..if there week or heavily fluctuating then this is where your problem may be.

Also use this PSU calculator so you can tell how much headroom you have with your PSU.: http://www.jscustompcs.com/power_supply/
post #14 of 14
They are called +12v rails for a reason, they should be more than 12v. Some still get stable overclocks with a +12v rail under 12v with excessive voltage, but if your +12v rail is below 12v and not consistent then you have a serious issue. A good tool to check your overclock for stability and to monitor your +12v rail, along with others, is OCCT. It will only give you a jpeg graph of your voltage on a successful test, so put it to an overclocked setting that you know you have stability at. As others have said there should not be a fluctuation of more than 5%.
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