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3700+ overclocked 100MHz, and computer won't boot

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April 29, 2006 9:26:46 PM

Last night, I was bored, so I went into the BIOS, and raised the FSB from 200 to 205; a 50MHz overclock. I exited the BIOS, and loaded Windows. Upon seeing that it worked, I restarted, went into the BIOS, and set the FSB to 210; a 100MHz overclock over the original 2.2GHz. I exited the BIOS and... black screen. I turned off the computer by holding the power button. I waited five minutes, turned it on again, and another black screen. What should I do? My specs are in my signature. Thanks in advance.
April 29, 2006 10:29:15 PM

Bump? Someone please help
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April 30, 2006 12:32:58 AM

Try turning your motherboard completely off with the switch on the psu or unplugging the psu. When i overclock too high and i have to shut down it wont boot again until i turn the motherboard totally off and then on again. It works for me anyways. Tell me if this works for you as well. Good luck :wink:
April 30, 2006 12:59:41 AM

reset your bios with the jumper on your motherboard near your mobo battery. Then lower your memory from 400..... down one notch.... then try again.... if you mess it up... reset your bios using the jumper.... it's easy
April 30, 2006 1:03:51 AM

Quote:
Try turning your motherboard completely off with the switch on the psu or unplugging the psu. When i overclock too high and i have to shut down it wont boot again until i turn the motherboard totally off and then on again. It works for me anyways. Tell me if this works for you as well. Good luck :wink:


It didn't work.
April 30, 2006 1:05:41 AM

Quote:
Can you go back to the BIOS and reset the FSB to stock. Try getting into your BIOS again and lowering the FSB, and see if that will let you boot into Windwos.

You system is unstable for whatever reason after the FSB increase.

What's your cooling, and check temps if you can get back into Windows.


I can't get into the BIOS; that's the problem.

Quote:
reset your bios with the jumper on your motherboard near your mobo battery. Then lower your memory from 400..... down one notch.... then try again.... if you mess it up... reset your bios using the jumper.... it's easy

To reset the BIOS, I just pull the jumper out and put in back in again, right?
April 30, 2006 1:37:31 AM

take the battery out, unplug the power supply from the board, reseat any cards & retry again & if you get into the bios, reset the defaults.
April 30, 2006 1:57:02 AM

Quote:
take the battery out, unplug the power supply from the board, reseat any cards & retry again & if you get into the bios, reset the defaults.


Yay! It worked!
April 30, 2006 2:02:36 AM

Quote:
You need to lower RAM to DDR333 in BIOS.


Why is the CPU temperature being shown as 13C in the BIOS? I'm using the stock AMD cooler with AS5.
April 30, 2006 2:13:08 AM

to reset the bios that way you have to start the computer with the battery out of the motherboard then it'll post and you shut down again reseat the battery and boot back up and everything will be back to default in the bios
April 30, 2006 4:05:55 AM

to reset the BIOS to stock settings, there are 3 pins.....X Y Z.... the jumper is currently on pins Y and Z...... move it to Y and X...... wait about 5 seconds and move it back to the original position. X being the far left or right pin that is currently not being jumpered.... Y being the middle pin that is jumpered to Z.... the pin on the other side of Y. Also.... if you have a manual for that board.... it will show it.
April 30, 2006 4:07:50 AM

Did my post make sense Ducky? It is really easy.... and works every time, just open up the case, move the jumper over, wait five seconds, move it back.... and restart..... Bios is reset to defaults..... why has no one else suggested this? It is the easiest way.....
April 30, 2006 2:36:26 PM

Quote:
Did my post make sense Ducky? It is really easy.... and works every time, just open up the case, move the jumper over, wait five seconds, move it back.... and restart..... Bios is reset to defaults..... why has no one else suggested this? It is the easiest way.....

It worked. Thanks a lot :) . Do you have any idea why the CPU temperature is being shown as 14C in the BIOS?
April 30, 2006 3:08:04 PM

Probably the temp sensors have been configured badly... should be more in the 30s-40s... not 10s... that would be watercooling temps...
April 30, 2006 3:11:39 PM

Quote:
Probably the temp sensors have been configured badly... should be more in the 30s-40s... not 10s... that would be watercooling temps...


That's what I was thinking. How do you configure the sensors? I just reset the BIOS, so I'd think it would show the correct temperature.
April 30, 2006 3:37:16 PM

Quote:
You need to lower RAM to DDR333 in BIOS.


I've lowered it to DDR333. If I raise the FSB, will the RAM speed go higher, as well. Or have I locked it at DDR333?
April 30, 2006 3:47:13 PM

the ram will go back up..... all you are doing is turning it down, and then making it go back towards 400 again with your OC. Rather than OC'ing the ram above 400, which it obviously cannot do.
April 30, 2006 3:48:53 PM

If you raise the fsb, the ram speed will go up 2mhz for every 1mhz you raise the FSB, since you have it in dual channel mode. So, for example, let's say you raise your FSB from 200 to 210, your RAM speed (starting at 333mhz) will raise to 353mhz.

What brand of RAM do you have? If you have decent RAM it shouldn't have any trouble running a 10mhz FSB overclock at stock voltages, what you may need to do is raise your memory timings a little, try setting your timings at 3-4-4-8 and leave your ram at DDR400, then try the 210mhz FSB speed.
April 30, 2006 3:57:08 PM

Quote:
If you raise the fsb, the ram speed will go up 2mhz for every 1mhz you raise the FSB, since you have it in dual channel mode. So, for example, let's say you raise your FSB from 200 to 210, your RAM speed (starting at 333mhz) will raise to 353mhz.

What brand of RAM do you have? If you have decent RAM it shouldn't have any trouble running a 10mhz FSB overclock at stock voltages, what you may need to do is raise your memory timings a little, try setting your timings at 3-4-4-8 and leave your ram at DDR400, then try the 210mhz FSB speed.


The RAM that I have is some no-name brand crap. It came with my computer, which was originally an HP with a P4. I think I'll just leave the RAM at DDR333, and overclock until it's back to DDR400.
April 30, 2006 4:11:30 PM

Quote:
Probably the temp sensors have been configured badly... should be more in the 30s-40s... not 10s... that would be watercooling temps...


Anyone know how to configure the sensors?
April 30, 2006 4:17:02 PM

Never had that problem before.... sorry, but I wouldn't really worry about it. Just make sure the heat sink is well seated and gets warm when you turn the computer on, then you know it is making pretty good contact. Other than that, I don't know what it would take to burn out one of these chips, other than removing the HS. I have tried to make them to hot with voltage on OC, just as long as the fan was running, they never burned up from heat.
April 30, 2006 4:20:27 PM

Quote:
Never had that problem before.... sorry, but I wouldn't really worry about it. Just make sure the heat sink is well seated and gets warm when you turn the computer on, then you know it is making pretty good contact. Other than that, I don't know what it would take to burn out one of these chips, other than removing the HS. I have tried to make them to hot with voltage on OC, just as long as the fan was running, they never burned up from heat.


If I'm overclocking, I want to know the exact CPU temperature.
April 30, 2006 4:23:46 PM

At 220MHz FSB, I got a BSOD. I restarted the computer, and set the FSB to 215. Prime95 failed after 3 minutes. I'll check the contact between the CPU and the heatsink. BRB
April 30, 2006 4:26:37 PM

You should be able to go well over 220, should be able to get it up to a 250 multi at least..... good luck man. Make sure to adjust the CPU voltage while you are doing this.... or you won't get much of a OC.
April 30, 2006 4:44:37 PM

To reset the BIOS, I just pull the jumper out and put in back in again, right?

For future reference you move the jumper over so the middle and other pin are bridged.
April 30, 2006 5:13:01 PM

angry_ducky, please read this sticky on how to overclock the A64, it might help to give you a better understanding. I've also run across this guide as well.
May 1, 2006 2:14:25 AM

Quote:
angry_ducky, please read this sticky on how to overclock the A64, it might help to give you a better understanding. I've also run across this guide as well.


Thanks for the links :D . I had read the sticky, but I found it somewhat hard to understand. I really like the guide; especially how it explains HTT. I'm going to finish reading the guide, and then bump up the voltage a bit. Right now, I'm shooting for 2.6GHz. Anything over that would be gravy. Wish me luck!
May 1, 2006 8:23:17 PM

The temp sensors are configured upon manufacture, so if they read the temps wrong, there's not much you can do about it. However, instead of relying on your mobo for finding out your system temps, why not buy a temperature monitor? Install the necessary probes and you'll see for yourself what the temperatures are really like.
May 2, 2006 6:39:21 AM

Return your motherboard to the manufacture and you´ll get it fixed...

I also have an 3700+ San Diego:
CPU clock: 2904MHz
Multiplier: 11x
FSB: 264MHz
Ram: 1,66x (438MHz) [Because of 4x 512Mb]
HTT: 4x (1056MHz)
vCore: 1,425v (1,45-1,47v according to CPU-Z)
vRam: 2,75v
vHTT: 1,25v
vChipset: 1,6v

Motherboard: Asus A8N-SLI Premium
Ram: 4x 512Mb Corsair PC4400/DDR550
Graphics: 2x Geforce 7800GT in Sli-mode
Sound: Soundblaster X-Fi ElitePro
Drive: 2x Raid0 (Striped) 250Gb, 16MB cache, SATA2 (500Gb and 32Mb cache :D )

It is stable in Prime95 and I get about 13000 p in 3DMark05...
May 2, 2006 7:48:39 AM

I didn't see it mentioned....did you lower htt to 4x? Doesn't like to be much over 1k
May 2, 2006 9:26:08 AM

Quote:
I didn't see it mentioned....did you lower htt to 4x? Doesn't like to be much over 1k


No, I didn't. Thanks for suggesting it. I have to get ready for school, but I'll be back later today with my overclocking results.
May 2, 2006 4:06:34 PM

My HTT would do 1200MHz without any problems. I had it there before... But I guess it depends on which motherboard you have.
May 2, 2006 6:37:36 PM

Quote:
My HTT would do 1200MHz without any problems. I had it there before... But I guess it depends on which motherboard you have.


Maybe mine won't.
May 2, 2006 6:56:23 PM

In more cases than not, you will have problems is you venture above 1100, I would keep it as close to 1000 as possible, and if you get to the point where you have a 300 multi, just drop your HTT to 3x, you won't take a performance hit by going under 1000. 900 is fine.
May 3, 2006 10:40:14 PM

Quote:
In more cases than not, you will have problems is you venture above 1100, I would keep it as close to 1000 as possible, and if you get to the point where you have a 300 multi, just drop your HTT to 3x, you won't take a performance hit by going under 1000. 900 is fine.


The CPU isn't stable at 2.42GHz; Prime95 fails after a few seconds, followed shortly by a BSOD.

I set the RAM to DDR333, set the HTT to 4x, and the CPU vcore to 1.4V from 1.3. The reference clock is 220MHz, so the RAM is running at about DDR370. What is causing the instability? It's Prime95 stable at 2.36GHz, so I don't know what's going on. Thanks for all the help so far

-Ducky
May 3, 2006 10:42:14 PM

Quote:
In more cases than not, you will have problems is you venture above 1100, I would keep it as close to 1000 as possible, and if you get to the point where you have a 300 multi, just drop your HTT to 3x, you won't take a performance hit by going under 1000. 900 is fine.


The CPU isn't stable at 2.42GHz; Prime95 fails after a few seconds, followed shortly by a BSOD.

I set the RAM to DDR333, set the HTT to 4x, and the CPU vcore to 1.4V from 1.3. The reference clock is 220MHz, so the RAM is running at about DDR370. What is causing the instability? It's Prime95 stable at 2.36GHz, so I don't know what's going on. Thanks for all the help so far

-Ducky
May 4, 2006 12:26:52 AM

bump. any thoughts on why it's not stable?
May 4, 2006 5:52:25 AM

What are your temps?
May 4, 2006 10:48:17 PM

Quote:
What are your temps?


38C at stock speeds after 12 hours of Prime95. I'm just guessing that the "local" temperature is the CPU temperature in SpeedFan.
May 5, 2006 12:47:09 AM

Bump. Any suggestions on why it's not stable?
May 5, 2006 5:06:14 AM

Quote:
Bump. Any suggestions on why it's not stable?

Try this:
Set the multiplier to 11x and the FSB to 241MHz. Change the ram to 1,66x just to be sure it´s working...
Set the chipset voltage to the max (about 1,6v) and turn the HTT to 4x.

Is it able to start with these settings? If not try to give it more volt. I am giving mine about 1.42v but I have it at 264MHz *11...
!