peltier stops working.

[TiTch]

I have two small questions. I'm getting the 220 w from Tekheads next month. When I start my system should I run my peltier and pump before I start up or does it reach operation immediately.

Secondly, if my peltier fails and stops working, will it cook my cpu or would enough heat be transfered to the block to keep it going.

[EMC2]

Depends on how far you are OC'ing regarding the startup sequencing. Remember, when you first start up after an extended off period, everything is at room temperature. It takes a bit until the pelt will get the CPU temperature down (thermal mass). Usually when using a pelt, you are doing it to get a very high OC, so you won't be able to boot until the CPU temp is reduced and of course it will get there more quickly with the computer off. ALWAYS have your pump on if the pelt has power.

The issue of the pelt dying - they are fairly reliable devices, but they can fail (especially if there are installation problems or you loose cooling to the hot side). I would strongly recommend a temperature controlled shutdown setup for any system with a pelt.

You can either make or buy a temp monitor that you can use to control power to the system with (both the computer and the pelt power), which is the most reliable method - or - you can use something like MotherBoard Monitor in conjuction with Shutdown to at least shutdown the computer itself at a safe temp that is above your normal operating range. The only problem with the software method is that it doesn't shut off power to the pelt.

[TiTch]

Thanks EMC2. I try to make most of my stuff if I can - have you seen any good articles with a sound design for a thermal cutoff that kills power to everything.

Sorry for being a pain

[mkosem]

I ususaly just used the power switch on my UPS to kill everything. it takes like 15-25 seconds for everything to get cold enough to boot at the chilled speeds(or at least from my experience).

--Matt

[EMC2]

Matt - it depends on what temp you need to be able to boot and how much mass your cold plate has. However, I didn't mean to imply 30 mins or anything, lol Titch's last question I think was concerning the issue of the automated safety shutdown if the temps start climbing (if there is a pelt or pump failure).

Titch - I don't remember seeing one off the top of my head. The things I remember seeing on the web are all based on purchased sub-components (usually like a digidoc). Can't say I've ever actually gone looking for a circuit though, as I build and design all my own stuff

If I run across anything in the near term along the lines you're interested in though, I'll let you know. I suspect there must be some simple cut-off circuits out there (on the web).

[mkosem]

aah, I had a prety big coldplate, on my old pelt setup I could turn it all on at the same time and be safe into windows. but that coldplate was like 3/16" thick

--Matt

[TiTch]

Thanks for the help, well appreciated.

I must admit I dont build for overclocking, but because I love the build. My water rig is the family computer which the kids use etc. The peltier obne will be no different. Hence tooking for an ortamated precaution. If digidoc will turn the power off then I might have to get one, but I hate buying if I can do it myself.

[Brad]

if kids are going to use it, you will need to make sure they know to turn the pelt and pump on first, then the computer, then make sure they turn it all off when done

[TiTch]

The kids are very good at turning the pump on and off, the 5 year old is very literal - the problem is the wife.......:shrug:

[Mr. Thompson]

LOL, my wife would not go near my pelt rig unless it was on. I ran it 24/7 most of the time anyway.

Perhaps the easiest way to rig a fail safe pelt setup is to use relays to turn on the pelt and waterpump, controled by the 12 volt line of the computers PSU. Then you can use Motherboard Monitor to shut down the whole rig if the CPU temps get to high.

I have always fired up the pump and pelt PSU for about 20 seconds prior to starting the computer. This lets the coldplate get below zero so the computer will boot with a high overclock. A compunurse probe on the edge coldplate is a good way to monitor temps.

If you choose to go the relay route, you can still delay the computers boot. After pushing the power button on the PC, hold the reset button in until the coldplate reaches the desired temp.

[Brad]

my mum isn't allowed to touch any of my comps at all

[Haddy]

Originally posted by Brad
my mum isn't allowed to touch any of my comps at all

cause hes affriad she might find his porn

[TiTch]

cause hes affriad she might find his porn

class

[Brad]

in all seriousness I have very little time for that. my gf/gf's are great for that problem

it's just that she doesn't have any idea what so ever when it comes to computers

[Kevin]

Originally posted by Brad
in all seriousness I have very little time for that. my gf/gf's are great for that problem

Brad, those kinky ass videos you find on Kazaa after searching for "naked girlfriend" do NOT count as girlfriends, dude!
-kev

[bigben2k]

You could setup a time delayed relay to your computer's PSU. That way you'd have an on-off button that works like a normal PC (except that it'd take 15-25 seconds to start booting!).

So if you want to get really fancy, you build a LED timer display, counting down the statup.

Just a thought...

[ECUPirate]

My gf like pr0n too... She reads the playboys even before I do.

[Brad]

kev - like that video you call your boyfriend?

[TiTch]

OUCH