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Uh oh.. friend is in a computer jam :/
Shoko_Lied
Member UncommonPosts: 2,193
ok my friend just got a rig and OC'd it besides my better opinion, he just go a 4850, Q6600, 4gigs, AsusP5ND... And he wanted to up the Vcore, Or the voltage going into the CPU from the PSU. He did this through the Bios config and he upped the voltaged quite a bit, and when he saved&exited bios config, the computer screen would not start up to the motherboard displayer in which is need to get to the bios in the first place... I know it takes alot more than a few volts to trash a CPU, So am I wondering, whats broke? Or is it the bios settings that is preventing startup, which in that case, is there a way to change a bios configuration without being able to access the motherboards bios in the first place? Anyways my friend wont be playing any MMOs in general until we are able to sort out how to fix his comp. This is crucial because if it "Is" the bios settings that are preventing startup, and in fact it did trash his CPU, then throwing in a new CPU would be just like feeding another rat to the snake. Also, could the Video card be trashed or just getting to much voltage preventing the screen startup? Because we are running a digital monitor linked directly to the video card. Anyways thanks for any info possible, If i could get some incite from anyone who knows there way around the computer, it would be appreciated 
Comments
Oh yeah, forgot to mention, it is a 600watt PSU
truy looking for the jumper on the board that will allow you to short out (and reset) bios to factory defaults.
you may need the manual to find it.
Only bump up the voltage in small incriments otherwise you will damage the processor .
Some links to OCing that board:
http://www.ocforums.com/showthread.php?t=387392
http://www.tomshardware.com/forum/248231-29-q6600-overclocking-asus-750i-board
Hey there,
First off I just wanted to say the best way to start overclocking a PC is like the above poster said, in small increments. You need to go change the clockspeed/frequency to what you might conceivably wish to overclock to then slowly start bringing up the voltage/v-core for the chip in increments of 0.05 or 0.1 - CPU's are extremely sensitive to voltage change and even a change of 0.25v can produce massive more amounts of heat. Once you start increasing in small increments you should then stress test your computer with a program such as SiSoft Sandra, or Prime 95 while monitoring temperatures with SpeedFan. Once you have reached a stable overclock using a stress tester, having slowly reached that point through incremental adjustments, then the computer should function quite well. But thats all beside the point, now onto your problem.
If the hardware hasn't truly been damaged, and I hope your friend attached a non-stock cooling unit before ramping up the voltage or that very might well be the case, there's generally two things you can try to restore functionality:
Firstly: most motherboards that are intended for overclocking have an express-recovery feature incase of just such events. You will need to check the manual but for example if my PC boots and for whatever reason I set a bios setting incorrectly, even if the screen is blank, I can press cntrl-F9 and it immediately recovers default motherboard settings.
Secondly: and this is your more viable option is to manually reset all bios settings. To do this open the PC's chasis and on the motherboard remove the battery. It looks like a standard clock-battery held in a little plastic bracket. Remove it and leave the motherboard for an hour (it should take much less time than that but its just to be sure) and also ensure that the PSU's power has been unplugged at the wall for motherboards do draw small bits of current if its left plugged in which will thwart your efforts. Thus just make sure it has no attachments to any power source what so ever. Once this is done the BIOS should be reset then simply stick back in the battery and everything should be dandy.
As for your problem on the graphics card it, theoretically, should not have been affected. When overclocking there is generally a secondary option for voltage and pci-e frequency setting (default is 100 hertz if I remember correctly). As a standard setting this option is automatically configured pc the bios but if you intend to overclock and fiddle with CPU voltages it is best to turn this setting to manual and then just make sure the manual setting is 100, so that any variations that may arise when you tweak frequencies wont inadvertently affect your PCI-E slot.
Another thing to bear in mind is that when you start altering the frequency of your CPU the frequency of your RAM also changes in tandem. And this is crucial for if you allow your RAM to automatically increase with your CPU without changing the settings to manual you could blow your RAM. To fix this all you need to do is disable the motherboard's automatic adjustment for RAM frequency and multipliers and set it to manual. Then once you have established what frequency x multiplier you want to use for your chip you can then set the new multiplier for your memory. For example:
3.0ghz = 333mhz (bus speed) x 9 multiplier STOCK. RAM: (in this instance lets work with some standard DDRII) 800x1 = 800mhz ----> the effect a stable working system
3.6 ghz = 400mhz x 9 multiplier OVERCLOCKED. RAM: (now that it has been overclocked) 866x1 = 866mhz (something like that, I would go and check the proper increases but I would have to shutdown my pc first and I have to dash off to work soon) essentially now that the CPU is overclocked the RAM is running at a frequency that is too high. Thus you change the memory multiplier to 400x2 = 800mhz and thus once again gives you the stable 800mhz frequency your RAM requires.
Anyways I hope this helps and that you can solve your problem and perhaps give your friend a little more insight into overclocking. Its a tricky business Mr.Frodo stepping out of your door, if you don't adjust your voltages right you just might end up being swept away by a melting CPU... *shrugs* my humour is terrible at best at this time in the morning :P
All the best and hope it goes well!
Kind Regards,
Pythos
lol I have done that so many times. My motherboard comes with a bios recovery though so it just reverts back to the last known good configuration if it happened.
I think my friend has that also, that is why he is really worried. We werent able to find anything on jumpers exclusively labeled as Bios for the P5ND manuals, so we just unplugged every jumper we could see on the mobo, hopefully one of them resets it. Either way, its either a solution or we are screwed anyways. Maybe i can con him into thinking his vid card is messed up and i will "offer" to throw it out for him
Wouldnt it be such tragity if his video card flew out of the garbage and into MY pc on accident.
I think my friend has that also, that is why he is really worried. We werent able to find anything on jumpers exclusively labeled as Bios for the P5ND manuals, so we just unplugged every jumper we could see on the mobo, hopefully one of them resets it. Either way, its either a solution or we are screwed anyways. Maybe i can con him into thinking his vid card is messed up and i will "offer" to throw it out for him
Wouldnt it be such tragity if his video card flew out of the garbage and into MY pc on accident.
Ok that's the brute force and ignorance method
hehe.
the jumper that you are looking for is across two of three pins [. .} . like so. Simply place it across the middle pin and the one it isn't currently on for a couple of seconds and then put it back where it was to start with. So if it starts off as above then move it to . [. .] & then back to [. .] . which will reset the bios.
After doing this try to start the machine. If the cpu fan and any motherboard lights etc. all start as normal but you still get nothing to the monitor then it's possible that the cpu is fried as that is one of the 1st things that the bios checks. Here is a link to where you can download the manual for that board http://support.asus.com/download/download.aspx?SLanguage=en-us&model=P5ND2-SLI
On that particular board, the CLR Bios Jumper is between the SATAII ports and the bios chip. Out of all the pins at the bottom of the board, it is the upper most 3 pins and should have a jumper thing in pins 1 and 2.
The v-core is the last thing i play with if i can't get an OC i want.
Normally, ocs fail becuase of your memory settings.
Uping the v-core is like the one bad thing you can do with a computer. Now if done saftly you may never notice any side effects (none may arise, however, its the fastest way to heat up and destroy your cpu). I took my q6600 up to 3.2 ghz and DROPPED MY V-CORE. That means less heat longer lasting and more speed. The trick was playing with the memory settings. Now sometimes this is not an option and if you want to hit 3.4 you often need to boost v-core a bit. a-BIT. The best way to do this, well here i swear by this guid afterall it the best guide i seen.
http://forums.extremeoverclocking.com/showthread.php?t=261409
It also has links to improving cooling etx. PS my comps stays at full load , q6600 @ 3.2, at or under 49C (at room temps of 95 F, when room temps are around 60-80 it sits around 40-45C), idles around 30-32C. With the lower than standards v-core (I boosted my rams voltage however, it stil below the manufactures normal rating (auto memory settings are awful number one way you can make your computer faster)).
This will change come i7 chips becuase they final RE-unlock the cpu multiplier, however, atm 90% of making your computer faster should be about the memory (In reguards to changing settings, the acctual ability to come from your mebo and cpu more than memory [however it still plays a large part]).
"Society in every state is a blessing, but government even in its best state is but a necessary evil; in its worst state an intolerable one ..." - Thomas Paine
I think my friend has that also, that is why he is really worried. We werent able to find anything on jumpers exclusively labeled as Bios for the P5ND manuals, so we just unplugged every jumper we could see on the mobo, hopefully one of them resets it. Either way, its either a solution or we are screwed anyways. Maybe i can con him into thinking his vid card is messed up and i will "offer" to throw it out for him
Wouldnt it be such tragity if his video card flew out of the garbage and into MY pc on accident.
ok...I knew
If you can't find the bios reset jumper, just unplug the computer from the wall and yank the battery out. It has the same end result.
Now with 57.3% more flames!
I understand that overclocking is fun and exciting but you should really get your friend to read up on it. Not only that but go to intel's site and see what the recomended maximum values are for voltage and heat so you know when your really getting things out of hand. And perhaps most importantly TAKE IT SLOW. You shouldn't up the vcore right away. Start by increasing Mhz on cpu first and wait unit it cannot boot. Up the vcore than by a small amount and see if it boots. If it doesn't it may be the memory so you'll have to adjust that. There are a thousand articles on overclocking that cpu and board and you should read a few before going in.