Posted 08 October 2007 - 03:09 AM
I'm back in the forums, and I'm trying not to follow the crowd. I want to save a 360 from the RRoD, so i'm going to attempt a watercooling project. The catch is I want to do it with Peltier Cooling, such as the Coolit 360 shown at CES.
CoolIT Xbox 360
I am trying to find out some values before I jump headlong into this project.
I need to know how much heat is created and/or dissipated from the CPU and GPU.
I'm trying to size a dual peltier setup with an external watercooling setup. Hopefully when I'm done... I can get that baby down to 15°C or less.
I am working on a budget though, but I was able to source an old, but still unused 600watt power supply to drive the watercooling system and peltier coolers.
What do you think? is it worth it? or just go for the watercooling?
When I get more money together.. I'll start posting some pictures, until then.. I'm going to work on adapting the motherboard.
Posted 08 October 2007 - 03:30 AM
Anyways i wouldn't do watercooling myself because its bulky and cost too much when you can just do the artic silver and add a fan or two. BUT if i was to do water cooling I would make it internal which im sure costs even more, but would make it less bulky. Thats just my opinion.
Good luck and do post some pics sooon!
Posted 08 October 2007 - 03:30 AM
Posted 08 October 2007 - 04:09 AM
You need to fix the 3 red lights before any new cooling mod will have any effect. Also, the 360 will not function below a certain temperature.
if he re-pastes the chips when he puts the new waterblocks on, that should fix it all just like an x-clamp replacement would.
Posted 08 October 2007 - 06:43 AM
Posted 08 October 2007 - 09:46 AM
As for the wattage, I believe that it's a 3.2 cpu with 3 cores(or did I lose my mind)? If that is the case I guess you can compare it to a Intel Quad, which needs a TEC in the 400W range to get temps close to 0c. This is having it mounted directly on the die.
I personally would go with the first choice I spoke off. It's safer, less if any condensation, 360 dosen't need that much cooling, and did I mention it's safer? After all you won't need temps close to freezing, as you're not going to overclock anything.
I'm building a similar "chiller" setup(pc verion) and I plan to use a 158W TEC. Mind you the current one I have (46W) keeps the reservoir at 2c without load. So once I triple it, I should make some ice.
Posted 08 October 2007 - 09:35 PM
As a side note, I was looking at Frozencpu.com at the 475W peltiers to use. I have the power supply to do it... I think I may custom fold a sheetmetal container and make my own kit.
Posted 08 October 2007 - 10:46 PM
Hope I'm wrong as i would love to see a phase change 360.. Good luck with it.
Posted 09 October 2007 - 01:18 AM
Thank you for the positive words GSX, I'm still trying to plan out the best way to attain a nearly sub-zero 360, without blowing lots of cash and attaining performance results. Eventually, I'll make this something that can be replicated, and hopefully turn it into a tutorial.
I'm still thinking about how to keep the condensation out from under the BGA setup. Maybe I could flow dielectric grease under the chips? (<-- doesn't sound safe..but hey.. its the idea phase right now)
If anyone has more ideas let me know.
Posted 11 October 2007 - 08:05 PM
I'm still designing the external enclosure to house the watercooling and power parts, but the search goes well.
After doing some measurements, I found out how much room I have to play with as far as the heatsinks and fitting the peltiers. I should have around 1-2mm overhang on the waterblock, so everything will be covered. Supposively the coolers I picked out were 158watt.. well below my hope.. but I did not realize I was working on a size constraint.
158 watt peltier coolers
I ended up buying 3 in case I need a replacement, or decide to mod my usb drink cooler to run off AC. Total cost shipped was around $32.
I will post pics and stats for the power supply I snagged from Microcenter. 600 watt dual rail external PSU with LED readout... $46. It works.. but its just leftover stock from back in the day.
I've decided.. i'm going to use cornformal coat around the CPU/GPU to protect against moisture. The type I have at work is able to be removed without a stripping agent (think booger glue.. the stuff they adhere credit cards and stuff in magazine with).
I'll be back when the peltiers arrive and I get a Cad design of the external case.
Posted 11 October 2007 - 10:45 PM
Posted 12 October 2007 - 03:51 AM
These are designed to get cold on one side, while hot on another when voltage is applied. They are used in portable cooler/heaters, ect. They've been used for overclocking for some time.
This is a video of something to the extent I'm trying to attain.
Boiling to 0°C
if you look at wikipedia for overclocking.. they are mentioned there too.
Thermal Electric Cooling.. [TEC]
I am unsure at the moment if I need some sort of variable voltage system to keep these under control.. but that will come about through R&D. I could just make a breadboard to increase voltage applied to the TEC's as head on the die increases.
Posted 12 October 2007 - 04:42 PM
This is an excellent guide on the subject:
Posted 12 October 2007 - 07:18 PM
Like im saying if i just put one one of these on the chips, then put the stock heat sink on top, would it work?
Also if this increases the size of the heatsink where are you putting the dvd drive?
Posted 12 October 2007 - 08:23 PM
The peltier itself is 3.3mm tall, so that shouldn't affect the height of the heatsink drastically. if it does.. I'll augment my heatsink and dvd drive to fit.
Filthy: I dont really need these to watercool, but they will chill my processor below ambient temperature. Translation--> the peltiers will cool the system below the temperature that the watercooling would do alone.
There are some really good links here about how they work, especially the link posted by Marmaladeboy.
Edited by 2501, 12 October 2007 - 08:23 PM.
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