Zoli Posted September 19, 2006 Posted September 19, 2006 Hi guys, I hope you can help me cause I'm really nervous. I've been experimenting the last few months with an underclock setting, besides the mild overclock that I was using. My idea was to use the underclock setting when I don't need a lot of power, like when watching movies, browsing the net, file sharing, downloading, etc... This way saving AC and lowering temperatures. For the underclock I lowered the Vcore to 1.00 V and also dropped the multiplier on the CPU to 5X. It seems the Vcore was a little too low and sometimes I was experiencing cold boot problems but nothing serious that a short cmos reset wouldn't cure. But now my computer will not boot, the display remains in stand by, fans are spining, power led is on and all 4 diangnostic leds are on also. I did the 24h proper cmos reset as described here on the forum and nothing happened. I'm out of options and ideas, please help! Quote Share this post Link to post Share on other sites More sharing options...
tasr Posted September 19, 2006 Posted September 19, 2006 Did you try a CMOS clear like this and follow it exactly. Your PSU is under powered. Power requirement for DFI motherboards are very high because they where designed from the ground up to overclock. A good quality PSU with ALL four (4) the power connectors plugged in will make a world of difference in stability and overclocking. These quality PSU can be found in the DFI Recommended Power Supplies . If it is not here forget it. If your BIOS is working ok for you great, but it is an old BIOS a doesn’t even support dual core CPU. Not that you have an x2 CPU. Check out the BIOS Factory threads. Tmod's Bios Flash CD & Utility CDs Quote Share this post Link to post Share on other sites More sharing options...
Zoli Posted September 19, 2006 Posted September 19, 2006 Thanks for the quick response, I did the CMOS clear exactly like in that thread. I know the PS is weak but it worked fine for a whole year when I was overclocking, but now I was actually underclocking. My cpu is far from being a power consuming monster and all 4 power connectors are pluged in! Quote Share this post Link to post Share on other sites More sharing options...
Cuttlefish1212 Posted September 19, 2006 Posted September 19, 2006 Why underclock? A computer only consumes as much power as it needs and underclocking (and undervolting) can be as harmful as overdoing it. Might want to try a minimal build outside of case to see if anything has given up the ghost. Have a spare PSU you can try? Quote Share this post Link to post Share on other sites More sharing options...
tasr Posted September 19, 2006 Posted September 19, 2006 Zoli, Please understand this. The motherboard needs the power, [email protected] minimal for a single video card setup. You can not change this regardless of what voltage settings you set in the BIOS. Quote Share this post Link to post Share on other sites More sharing options...
Zoli Posted September 19, 2006 Posted September 19, 2006 Cuttlefish1212 what does this mean? Did I kill my CPU with the undervolt? I don't have another PSU and I don't have cash for a new one. The only thing that would help is to maybe narrow down the problem a little, to know if the CPU is dead or not. However it really seems strange to me that undervolting a CPU would do so much damage. Quote Share this post Link to post Share on other sites More sharing options...
tasr Posted September 19, 2006 Posted September 19, 2006 Zoli, Chances are slim that you killed your CPU by under volts. If you replace that PSU you will be surprised. Hopefully it didn’t kill any of your other components. What are you going to replace to get your rig running, if you don’t have the money to replace the PSU? Why don’t you test your PSU? Testing Your PSU Voltage Rails and HOW TO JUMP A PSU But bottom replace the PSU your rig will thank you. Quote Share this post Link to post Share on other sites More sharing options...
ganders75 Posted September 19, 2006 Posted September 19, 2006 Yeah, i strongly suspect that your PSU has gone bad enough that it will no longer boot the board - It is more than likely the cause of your cold boot problems also... If you know someone that has a better PSU, you could try it out and see if it fixes your problem? Or maybe take your rig into a local retailer and see if they'll let you give a Recommended PSU a shot before you buy? At least then you'd know? Quote Share this post Link to post Share on other sites More sharing options...
Zoli Posted September 19, 2006 Posted September 19, 2006 okay, i'll try to find another PSU, it's true that it is very weak and maybe it got even weaker. However I want to point out that I experienced the could boot problems only when I was undervolting! So, my concern is that something may have happend to the CPU because a short cmos reset allways solved the cold boot on the spot. I'm a very unhappy needless to say, cause I'm planing to buy a better PSU, but if something happend to the CPU I'll be out of money and out of luck! Quote Share this post Link to post Share on other sites More sharing options...
ganders75 Posted September 19, 2006 Posted September 19, 2006 Well, if you're undervolting the CPU by as much as you were i wouldn't be at all suprised by the cold boot problems that you were experiencing... In fact, i'm somewhat amazed that it booted at all to be fair... I seriously doubt that you'll have done it any serious/permanent damage. That said, I suppose it is possible that by undervolting you have made it totally mess up the BIOS - in which case you might need a new chip sent out? Quote Share this post Link to post Share on other sites More sharing options...
Zoli Posted September 19, 2006 Posted September 19, 2006 messed up bios... really? That sounds kind of bad also. Is there any chance to solve this with a longer then 24h cmos reset? Quote Share this post Link to post Share on other sites More sharing options...
Cuttlefish1212 Posted September 20, 2006 Posted September 20, 2006 The harm in undervolting is mainly stability. The system isn't stable because it isn't recieving the necessary juice to run at default specs so you can have things like data corruption or intermittent hardware failure (not death just failure). It's a slight chance that you caused physical damage by undervolting, but it can happen. Put it this way...ANY time you run a computer outside of "normal" operating parameters, be they above or below, you run a risk. The level of risk depends upon how far out from the margins you are. Your PSU is probably a large part of the equation...take the advice given and get a better PSU. Quote Share this post Link to post Share on other sites More sharing options...
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