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Mineral Oil Cooled PC

Project Ready DIY Kit for the PC Enthusiast

WARNING: Submerging your hardware in mineral oil will void your warranty. Do this project only at your own risk. Puget Systems is not liable for any hardware problems, or damage to your personal property. Mineral oil is very difficult, if not impossible to clean from your components once they are submerged.


The EATX kit is our largest kit currently available. By using a large 12 gallon aquarium, motherboards all the way up to EATX can be used. With the massive 9x120mm radiator, the oil is kept cool even when a dual CPU and dual video card system is installed. For storage, a single hard drive can be used by default. Through the use of PCI SATA and Molex pass-through brackets, this can be expanded to accommodate a second hard drive. Only one 2.5" drive and one 3.5" drive can be mounted at the same time.

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We are working hard on this kit
and will launch when complete.
The current ETA is winter 2014.
Delivery Time: typically ships in 3-7 business days
Warranty: 30 day DOA warranty

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Other Items Needed

Mineral Oil Other Components

We have coordinated with STE Oil to make sure you can buy the right oil in the quantities you need for each of our kits.

From CPU coolers we have tested, to power supplies, to bubble bars -- we put together an Amazon list of items that we KNOW work well, and encourage you to use those same components to have the best experience possible.

Looking for more flexability? We also sell many of the individual components for all our current kits on our parts store.

Why are we selling DIY kits?

Having created three revisions of the aquarium computer, and observing their operation for years, we have gained extensive experience in building aquarium computers. We know first-hand that it takes endless hours to determine what parts you need, find a source, and wait for them to get in. What's worse, with something this customized, it often takes multiple attempts to find the parts that fit properly and work just right. After building our second revision of aquarium computer, we realized that we've done all of this work, and that we should share it with everyone!

By offering these DIY kits, we are saving you very large amounts of time spent on research, ordering, and mistakes. The end cost of the project is much lower, because you can get in the right parts, the first time. Since we are ordering in the parts in bulk, we are able to get the parts cheaper, which allows us to make the margin we need to fund the project, while continuing to offer them at a lower price than you'd get if ordering them one at a time from various sources. It's a win for everyone!

Kit Comparison:

  ITX V1 Kit   mATX V1 Kit   EATX V4 Kit  
Tank Size 2 gallons 8 gallons 12 gallons
Motherboard Compatibility ITX   ITX, mATX   ITX, mATX, ATX, EATX  
Harddrive Mounts 1 x 2.5" 2 x 2.5" 1 x 2.5", 1 x 3.5"
LED Light Mount Yes Yes Yes
Access Port None Small Large
Recommended Maximum Wattage 150 watts 700 watts 1000 watts
Tubing Size 1/2" 1/2" 1/2"
Radiator Size 1x120mm Up to 4x120mm 9x120mm

Useful Information:

Other items you may need
As a do-it-yourself project, Puget Systems takes care of all the hard work and planning with the kit contents, but there are still some items you will need to obtain on your own. View this page to make sure you have everything you need!
Various hardware and assembly tips
A mineral oil submerged computer has some unique needs from the computer hardware you put inside. This page details our thoughts and tips about various computer components.

EATX V4 Kit Cooling Performance

Temperatures Under Load

Under full load with Prime 95 (16 threads) and FurMark (multi-GPU mode), our test system pulls a staggering 820W from the wall! That is a lot of heat to dissipate. We used Antec tri-cool fans on the radiator, and we tested the system with the fans on low speed (very quiet), and on high speed (no so quiet). Even with the fans on low, the system maxes out at just over 60C CPU temperature. When pulling 820W of power, that's a very impressive number! It took the system about an hour to reach maximum temperature.
Temperatures At Idle

At idle, you see the submersion cooling shine even more. Even though the extreme test system is still pulling 230W from the wall (which is high for a PC), the cooling system easily handles the load, reaching a CPU temperature of around 27C with fans on low speed. This is only a few degrees over ambient, and can be confirmed by placing hands on the tank -- it is only mildly warm to the touch! Again, the system takes about an hour to reach its bottom temperature once we cut off the load.

EATX V4 Kit Design Features

Larger, Sturdy Frame Larger, Sturdy Frame: Mineral oil submersion is very effective at cooling extreme PCs, but extreme PCs take up a lot of space! The new V4 kit is larger, allowing for more room to work, and more room to fit high end components. Brackets down the side of the motherboard tray allow for mounting of more components, and also add a great deal of rigidity to the tray. This is important because as you lift the tray out of the aquarium, you don't not want it to flex and loosen your components!
Ease of maintenance Ease of maintenance: First, the V4 Kit mounts the power supply on the motherboard tray, which is a huge improvement over the lack of a power supply mount on the V2 Kit! It makes the entire PC into a single unit, so if you pull it out of the tank, you don't have to worry about cables or wires -- everything moves together. Second, with the larger tray, we are able to create a larger access port. Our goal was to make the port large enough for most people's hands to fit through. This makes it much easier to reach into the tank and make fast adjustments. Third, we have added lift handles to the top of the motherboard tray, making it much easier to lift up and out of the tank.
Cable routing Cable routing: Mounting the power supply on the motherboard tray means that you gain much more control over your cable routing. We provide holes throughout the tray (especially along the side walls, and across the bottom) to allow you to firmly zip-tie your cabling in place. It looks great!
Fits full eATX Motherboards Fits full eATX Motherboards: You can fit up to an EATX sized motherboard onto the tray, allowing you to use extreme dual processor motherboards! If you use a mATX or ATX motherboard, you expose additional cable routing points along the motherboard tray, and allow for mounting of additional lighting.
Fits multiple full size video cards Fits multiple full size video cards: We make sure that the video card area is completely clear of obstructions. You have room to mount even the longest length video cards, and you can fit up to three video cards into the system with no modding required!
Mounts extended length power supply Mounts extended length power supply: Anticipating high end configurations, we wanted to make sure that you have room to fit even the most extreme power supplies. We have kept the area below the power supply clear, allowing you to mount very high end, long length power supplies.
Enormous cooling capacity Enormous cooling capacity: The V4 kit uses a larger radiator, with a 3x3 grid of 120mm fans. With 9 fans, you can run them all on low speeds, allowing for both quiet operation and extreme cooling!
Dual pumps High power pump: We use a high power pump to gain the flow rate necessary to make good use of all the surface area provided with the larger radiator. It also gives the system enough power to pump the fluid through the radiator with no priming necessary, making the system much easier to set up.
Hard drive mounts Hard drive mounts: The larger size of the tray gives us room to provide mounting points for both a 2.5 inch hard drive (such as a SSD) and a full size 3.5 inch hard drive. We provide spacers to lift the hard drives off the tray by a small amount, allowing airflow around the hard drives, keeping them cooler.