Power Outage

mo · 09-19-2002, 12:41 PM

Heres a scenario...

You just finished setting up your super duper overclocked out the wazooo watercooled system. You've tweaked it and maxed it out to the extreme and you have the cpu pushed to its limit. Your pump is sending out water to your waterblock which cools the cpu down and stops it from frying itself, when oops... POWER OUTAGE. That shit happens in Montreal at least a couple times a year... Hydro just mucks shit up. Having a APC backup wouldnt help either because unless you invest into something obscene, you are just looking at 45 minutes grace before the battery dies. And if you arent there to see it happen, your still going to end up with a potentially red hot cpu, with no more water being pushed to cool it down.

Is this a non issue?

bigben2k · 09-19-2002, 12:47 PM

If your mobo doesn't have OCP, then read this

Skulemate · 09-19-2002, 04:16 PM

I think I'm missing something... if the power is off, then how's your computer still making heat? And if your answer is "well, I have an UPS" then my next question is why don't you have your pump plugged into that instead of your monitor?

mo · 09-19-2002, 04:38 PM

if a pc shuts off abruptly theres a couple of seconds where the processor temp will rise. Herein lies my concern. And like I said, the battery pack is only useful if the power comes back within its lifetime. Your point is valid though. Im just wondering if the temp rise in seriously overclocked processors in a power cut outage would cause damage to the processor or if its a non issue.

Not sure what OCP is but hopefully the link will have that answer

bigben2k · 09-19-2002, 04:51 PM

That would involve the copper block temp rising above 65 deg C, and I don't believe that that could happen within 2 seconds, heck not even within 2 minutes!

OCP is a built-in circuit (on the mobo) that reads the diode and shuts itself off once it reaches a set temp. It needs to be this way because the CPU (AMD) would fry almost instantly if the cooling device falls off (not likely). Otherwise it's good on-board protection. pH's gizmo will work equally well.

Skulemate · 09-19-2002, 04:53 PM

Mo, I am willing to bet that the mass of the block, as well as the mass of water in it are more than able to take this small bif of heat.

mo · 09-19-2002, 05:34 PM

Just making sure. Trying to think of anything that could possibly go wrong

wymjym · 09-19-2002, 05:43 PM

things can go wrong but your concern about the heat spike and no flow is a non issue, I promise.
water cooled for several years....
wj

Heavy_Equipment · 09-20-2002, 07:00 PM

I have pulled the plug on my pump a few times, just to see the 'what if'. I'm referring to back when I was ambient cooling BTW.
The "fastest" my temps ever rose to critical was over about 12 minutes, under full load.
There's no way you are going to see the split second temp spikes you are referring to, on a system that is off.

I sure wouldn't recommend having your computer on a UPS, without the cooling backed-up too. Sure the pump would suck the life out of the battery time, but you are just waiting for the BBQ otherwise.

bigben2k · 09-20-2002, 08:09 PM

Thanks Heavy, that was...

Mo, there are more things to worry about, like what happens when something goes wrong if you left the house, and the comp is on. What if your pump dies? What if you spring a leak?

OCP is the answer, in every case.

mo · 09-20-2002, 08:40 PM

Thanks guys. The fear just popped into my mind on seeing a "gadget" that helps cool the pc when you power it off. The thought just crossed my mind and I realise now it is a non issue

Im literally tingling with excitement

Maze3 is on its way in the mail and so is my pump. Next week I get it to put it all together. wheee!

Heavy_Equipment · 09-20-2002, 09:29 PM

Quote:

Thanks Heavy, that was...

Yeah, I see your...

Just giving him some practical experience.

redleader · 09-20-2002, 10:18 PM

Quote:

if a pc shuts off abruptly theres a couple of seconds where the processor temp will rise

How? And don't say capacitance. Thats not going to heat a liter of water and kilo of copper 15 C.

09-19-2002, 12:41 PM	#1
mo Cooling Savant Join Date: Aug 2002 Location: Canada, Montreal Posts: 136	Power Outage Heres a scenario... You just finished setting up your super duper overclocked out the wazooo watercooled system. You've tweaked it and maxed it out to the extreme and you have the cpu pushed to its limit. Your pump is sending out water to your waterblock which cools the cpu down and stops it from frying itself, when oops... POWER OUTAGE. That shit happens in Montreal at least a couple times a year... Hydro just mucks shit up. Having a APC backup wouldnt help either because unless you invest into something obscene, you are just looking at 45 minutes grace before the battery dies. And if you arent there to see it happen, your still going to end up with a potentially red hot cpu, with no more water being pushed to cool it down. Is this a non issue?

09-19-2002, 12:47 PM	#2
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	If your mobo doesn't have OCP, then read this __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

09-19-2002, 04:16 PM	#3
Skulemate Cooling Savant Join Date: Jul 2002 Location: Toronto, Canada Posts: 381	I think I'm missing something... if the power is off, then how's your computer still making heat? And if your answer is "well, I have an UPS" then my next question is why don't you have your pump plugged into that instead of your monitor? __________________ Michael E. Robbins M.A.Sc. Candidate, University of Toronto 12.1 GHz of AMD's finest (17.7 GHz total) crunching proudly for the AMDMB.com Killer Frogs SETI BOINC: Dual Opteron 246s (Iwill DK8N) \| XP2800+ (Shuttle SN41G2) \| 3x XP2400+ (ASUS A7N266-vm) SETI BOINC: 2x P4 2.8E (ASUS P4R800-vm) \| Crunching 24/7

09-19-2002, 04:51 PM	#5
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	That would involve the copper block temp rising above 65 deg C, and I don't believe that that could happen within 2 seconds, heck not even within 2 minutes! OCP is a built-in circuit (on the mobo) that reads the diode and shuts itself off once it reaches a set temp. It needs to be this way because the CPU (AMD) would fry almost instantly if the cooling device falls off (not likely). Otherwise it's good on-board protection. pH's gizmo will work equally well. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

09-19-2002, 04:53 PM	#6
Skulemate Cooling Savant Join Date: Jul 2002 Location: Toronto, Canada Posts: 381	Mo, I am willing to bet that the mass of the block, as well as the mass of water in it are more than able to take this small bif of heat. __________________ Michael E. Robbins M.A.Sc. Candidate, University of Toronto 12.1 GHz of AMD's finest (17.7 GHz total) crunching proudly for the AMDMB.com Killer Frogs SETI BOINC: Dual Opteron 246s (Iwill DK8N) \| XP2800+ (Shuttle SN41G2) \| 3x XP2400+ (ASUS A7N266-vm) SETI BOINC: 2x P4 2.8E (ASUS P4R800-vm) \| Crunching 24/7

09-19-2002, 04:38 PM	#4
mo Cooling Savant Join Date: Aug 2002 Location: Canada, Montreal Posts: 136	if a pc shuts off abruptly theres a couple of seconds where the processor temp will rise. Herein lies my concern. And like I said, the battery pack is only useful if the power comes back within its lifetime. Your point is valid though. Im just wondering if the temp rise in seriously overclocked processors in a power cut outage would cause damage to the processor or if its a non issue. Not sure what OCP is but hopefully the link will have that answer

09-19-2002, 05:34 PM	#7
mo Cooling Savant Join Date: Aug 2002 Location: Canada, Montreal Posts: 136	Just making sure. Trying to think of anything that could possibly go wrong

09-19-2002, 05:43 PM	#8
wymjym Cooling Neophyte Join Date: Sep 2002 Location: near Austin Posts: 96	things can go wrong but your concern about the heat spike and no flow is a non issue, I promise. water cooled for several years.... wj

09-20-2002, 07:00 PM	#9
Heavy_Equipment Cooling Savant Join Date: Mar 2002 Location: Newmarket, Ontario, Canada Posts: 282	I have pulled the plug on my pump a few times, just to see the 'what if'. I'm referring to back when I was ambient cooling BTW. The "fastest" my temps ever rose to critical was over about 12 minutes, under full load. There's no way you are going to see the split second temp spikes you are referring to, on a system that is off. I sure wouldn't recommend having your computer on a UPS, without the cooling backed-up too. Sure the pump would suck the life out of the battery time, but you are just waiting for the BBQ otherwise.

09-20-2002, 08:09 PM	#10
bigben2k Responsible for 2% of all the posts here. Join Date: May 2002 Location: Texas, U.S.A. Posts: 8,302	Thanks Heavy, that was... Mo, there are more things to worry about, like what happens when something goes wrong if you left the house, and the comp is on. What if your pump dies? What if you spring a leak? OCP is the answer, in every case. __________________ WBTA (Water Block Testing Alliance) Nordic Hardware WC 101

09-20-2002, 08:40 PM	#11
mo Cooling Savant Join Date: Aug 2002 Location: Canada, Montreal Posts: 136	Thanks guys. The fear just popped into my mind on seeing a "gadget" that helps cool the pc when you power it off. The thought just crossed my mind and I realise now it is a non issue Im literally tingling with excitement Maze3 is on its way in the mail and so is my pump. Next week I get it to put it all together. wheee!

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