hi, sorry i need to ask this question
can i run the peltier with a 34 Amp psu with 12 volt if the peltier specs are 24 amp 12 volt?

[Shamino]

Yes sireee you can

Originally posted by Daredevil
hi, sorry i need to ask this question
can i run the peltier with a 34 Amp psu with 12 volt if the peltier specs are 24 amp 12 volt?

General answer is YES, you can but...

1. Do some maths and calculate total amperage (maximum theoretical system load) that your system may draw (every device you've got in your case has a label with electrical requirements on it, write it all down from every device).
You should be able to find elec. requir. of your cpu on AMD or Intel websites.
I am not sure about mobo elec. specs but try on manuf. websites. Same applies to your graphics board.
As a result you should have separate loads for 3V, 5V and 12V lines. Summarise the amperage and you'll get total maximum theoretical load of your PSU. To stay on the safe side add 5 % contingency. ( Oh don't forget about fans lights and the like).
Now find your PSU's detailed specs and read it in as much detail as you can handle (could end up asleep and drooling all over the place )
What you're looking for are the following specs:
- 12V line max amp
- 3V line max amp
- 5V line max amp

12V rail is 99% cases has separate rail,
where 3v&5v usually come off the same power rail (there are exceptions)
PSU's specs sheet should tell you max amps for 3v & 5v and then go on to say that max combined wattage drawn by 3v + 5v lines cannot be more than x. That's the point you have to watch out for. Even thou they may have whooping high max amperages separately when combined it’s no longer so rosy… I mentioning his in case you’re into hardcore ocing with massive overvolting (power draw from a cpu may go as high as ~150Watts when overvolted, not to mention volt modded graphics, vmem etc.).
Right, that one sorted so we can go to 12v. Much easier, just add aup all the data you’ve gathered and presto.
Having both 12v and 3v+5V calculated add it up and see how much spare wattage you’ve got left (every PSU has max grand total wattage it’s able to supply).
Now you see if you can power your 220watt pelt from your main psu. If you on the ragged edge before adding contingency buy yourself another cpu with good 12v rail amperage and you’ll still be spending fraction of a price of Manwell dedicated pelt psu (in uk manwell goes for over £100 and Enermax 465 for £60 and it can power more than one pelt!).
When you all right with your maths and it’s obvious that your psu can handle the hungry pelt you’re ready for the next step.
Connecting an appliance which draws ~20amps has to be carefully. Use electrical connection cube ( you know white plastic thingie with four screw-in receptacles for wires) rated at least 25amps or if you know how solder wires directly.

If here is my way:
Cut off one of the molex connectors, strip yellow (live) and black (ground) wires for 1cm, twist ‘small’ wires to make one solid wire for live and neutral respectively for both psu and pelt – you should have four ‘solid’ wires without any ‘bristling’. Pre-tin them all with solder; done that get some small wires of the same kind as psu and pelt –they are not copper- twist them together to form ~1/4 smaller wire than the ones you want to connect. Now comes dextrous part – hold together pre tinned ends of ‘live’ wires in a fashion to have them overlapping each other/being beside or on top of each other and join them together by wrapping ‘smaller wire’ around them as tightly as possible joining them together as well as you can. Do it for both live and ground pair of wires.
Writing live I do not mean connected to wall socket LOL – all of the above should be only done while all the equipment is disconnected from mains power supply – just to make sure, don’t take any offence or do not think I think that you’re a dumb a$$ LOL.

After you did this ‘joining’ use lots of solder to cover such connection. Male sure you heated it to the max (solder should be flowing freely, dripping almost). You should end up with two connected wires and the soldered connection should look like made of solid solder without too much wires visible (nevertheless it shouldn’t be much thicker than isolated wires themselves. Now use heat shrink isolator or lots off electrical tape. If you done it right such a connection should not heat up with current flowing through it.

You may all wonder why did I spent so much time describing stupid soldering….
Well, initially I connected my Swiffy MCW 5000P-T water block’s pelt to my main psu using box screw in connector (what’s the proper name for the dammn thing, anyone?) supplied with the block.
Guess what? Went up in flames, melted wires, connector box, molex, the lot – almost lost my cpu and board.
Only temp probes saved me…. (will attach pics to show gory damage it caused).

There’s one more thing. Somebody said that powering 220 watt pelt from your main psu will casue BIG volt instability and fluctuations (due to psu working at it’s limits) and thus hamper ocing efforts. I will be getting separate Enermax to power my baby shortly and I’ll be able to verify it.
I am usind separate psu to power my R9500’s pelt – to unload main psu I connected all fans except one to that separate psu – no real difference (they are not the high power 120mm fans that’s probably why ).


Comments and constructive critique much welcome

[Shamino]

I really really don't think its a good idea to use the same power supply for the system. Anyways, does that meanwell even have 3.3v 5v outputs?
What I find ironic is the wires that come supplied with pelts are a lot of time, quite wimpy considering the current they draw. And bad connections not just heats up the wires, it also reduces the current going to the pelt and thus reduces performance.
Jabo, these days I always manually splice the pelt wires, always worked better than connectors for my case.

?
you mean it went up in flame cause of bad connection?
=P
dun worry ... i did 2 and a half years of wire connection should be alrite ..

i went to check the price ...
i can get a meanwell about the same price as a good psu ...
i cannot find enermax...
antec truepower 550 is even more ex than the meanwell

what i was worried is that since i cannot control the amount of current running to the peltier ... if the peltier draw the total wattage and current of the psu .. it might get too hot and spoil the peltier...

[Shamino]

You can only control current by controlling voltage. But 34A when supplying 12v is more than adequate. The pelt will draw current accordingly, give it 12v and it will suck ~19-20A.

Originally posted by Shamino
I really really don't think its a good idea to use the same power supply for the system. Anyways, does that meanwell even have 3.3v 5v outputs?
What I find ironic is the wires that come supplied with pelts are a lot of time, quite wimpy considering the current they draw. And bad connections not just heats up the wires, it also reduces the current going to the pelt and thus reduces performance.
Jabo, these days I always manually splice the pelt wires, always worked better than connectors for my case.

I've been running it for two weeks now and it's been fine (the whole system inc. pelt powered from one Enermax PSu...)
Meanweel is specificly for pelts, it's got only 12v supply and I think it's rated 25amps.

Yeah, wire splicing rules!
That's why my went up in flames (connection Ithat is)

i am getting the meanwell 12v 34 amp one
its even cheaper than the 12v 24 amp
to think about it
i can even run a 80 watt peltier along with the 226 one if i go for the 34 amp one
226 for cpu
80 for gpu
sound nice?

[Shamino]

Sounds nice. Just don't get shocked by your electricity bill at the end of the month

Originally posted by Daredevil
i am getting the meanwell 12v 34 amp one
its even cheaper than the 12v 24 amp
to think about it
i can even run a 80 watt peltier along with the 226 one if i go for the 34 amp one
226 for cpu
80 for gpu
sound nice?

Hehehe , that's what I am running at the mo.
GPU - > I am running my R9500 soft modded @ 12Cidle up to 21C full load and max oc (375core/305mem) I'd suggest getting 126 pelt for your gpu... specially if it's one of the new ones.

My temps are still very good compared to 60C I was getting on stock cooling without any ocing

[Q00]

u dun happen to be running that monster enermax 800watt psu are u?

Originally posted by Q00
u dun happen to be running that monster enermax 800watt psu are u?

I wish (see my sig)
One of server type ones :sleep3: *me drooling from desire to have one*