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post #11 of 49
That was about the shoddiest mod I've seen featured by Tom's--the idea is brilliant, the execution kinda sloppy--first off there is no sense in buying something that easy to make--secondly the mods required to make that case oil-tight preclude the mounting of HDDs, DVD/CD drives, a PSU or any other elctromotive device like fans. A purpose-built case that takes all of these devices into account and incorporates them in a single, somewhat portable unit would be inifinitely more like a PC than the pile of equipment and tangle of cables as shown in the featured rig.

Isolating electromotive and high voltage devices from the components in the oil bath is the fun part of this mod--doing so in neat and compact maner would be challenging and probably worth the trouble.

Note the builders of that system pointed out that cooking oil rapidly Hydroxylises (goes rancid creating fatty acids which might have a deleterious effect on the equipment--and thought motor oil would be ideal (since it resists these changes nearly permanently).

Another oil to consider is a dielectric oil--there are a number of dielelctric oils, some of them with extremely low viscosity, which would be ideal if you were also considering introducing a chiller to the system. I have seen an article detailing an intense liquid nitrogen overclock using an oil bath in a tray to prevent condensation and lockup.

Oil is a long time temperature stabilizer for heavy-duty electrical and electronic components (like the transfomrers you see on the power poles) prolonging the life of these components by distributing the heat more uniformly (rather than localised in hot spots). However, oil is pretty sluggish compared to water when it comes to temperature changes--it takes a while to get hot, but when it takes a while to lose that heat. I would like to see a more long-term set of tests to verify the conclusion reached by the fellows in the Tom's article that oils would probably be a good way to build a silent rig.
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post #12 of 49
In the mod vid they built a case, it wasn't sunbeams case.

What would be a better idea to build a silent rig ?
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post #13 of 49
good luck trying to change a video card or add a pci or pcie card

drain the oil
take the messy oil soaked part off
put on the new part
put it back in the case
re-sillicone the holes caused by the new card
pour in the new oil
towel up the area
vacuum your oil soaked rug
shower
play new video game only to realize video-card will not initialize unless you install driver before installing card.

rip out hair and use it to hang yourself form a moving ceiling fan
bring ceiling fan crashing down upon you

explain to cops and landlord that the box of oil is really a computer
bang head on padded wall for next 40 years



Ill stick to my big typhoon and good airflow thanks

:-P
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post #14 of 49
Thread Starter 
Lmao......
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post #15 of 49
Synthetic Motor oil would be great, but it's a bit pricey. Non-cooking oils dont; rot. Go with some sort of motor oil, preferrably synthetic, but you need a case that would stand up to the punishment the oil will dish out on plastics.

I would use a high torque, 1000 RPM motor with a trolling motor prop. That would work well for circulating the oil, or you could run refrigerant lines through the oil and coll it that way........
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post #16 of 49
I was thinking about something ..
Why fill the whole case with oil ?
Why not just build a smaller case that you can attach to you case and have you mobo and you attached components in the oil bassin. That way you need less oil and you don't have to move you mecanical components.

What do you guys think about use baby oil ? It shouldn't rot from what I know of it..
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post #17 of 49
You just thought of that 0_o
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post #18 of 49
Well it kills the looks though , but now I don't really care anymore .
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post #19 of 49
Quote:
Originally Posted by Radwen
In the mod vid they built a case, it wasn't sunbeams case.

What would be a better idea to build a silent rig ?
Good question! By the way if you look at the THG mod it is a kit--they say so...why else would they be siliconing plates of acrylic over pre-cut fan holes?

As mentioned in the discussion above it would probably be a good idea to only have and oil tray or pan for the hottest components--the mobo, cpu, video card--and that some provision in the design must be made to allow for easy service to these components--no sense in making it hard to change a card or processor..

If you situate the mobo in an unconventional manner so that the expansion slots point straight up it would no longer be completely necessary to silicon and oilproof that area as the oil bath--some sort of dust-shield or gasket would suffice.

Obviously immersing the PSU has some risks, but I would be very interested to see how it works in certified dielectric oil--usually the PSU is the noisiest part of a quiet PC. I think using a passively cooled PSU would work well--but simply disconnecting the fans from a regular PSU would probably work.

I am pretty sure keeping the HDDs, and other peripherals out of the oil is the only way to go.

So it is pretty clear that a two level case is involved--the idea about running refrigerant lines through the oil is right on target--to circulate the oil a simple aquarium (peristaltic) pump in the right location with short lengths of tubing might be all that is required--I am not sure how important it would be to circulate the oil if it was being chilled by a cold plate.

Imagine a sub-unit that houses the compressor, heat-exchanger and coldplate (these are readily available for marine applications to make custom freezers out of existing ice-boxes);

On top of this sub unit is the 2-level PC case--the mobo is supported vertically so that the expansion card slots are facing up--the PSU (I guess)board and cards are immersed in oil--the oil chamber is boot or "L" shaped with the PSU off to one side from the mobo (in the toes of the boot);

Beside the oil chamber is a smaller insulated compartment that houses the hard drives and optical drives.

Not only would there be no need for pumps or fans or complex plumbing, but the cold plate could be substituted for a big chunk of aluminum or copper that could radiate the heat from the oil chamber passively.

But since Over Clocking is clearly required here, a cold plate, though somewhat noisy, would have some real benefits for extreme OC.
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post #20 of 49
haha, I guess i could not not further OC my rig if I build such a system .

1 Question, where would I find this stuff and how much do you think it would cost ?
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