Project: Desk Rad

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Joined
10 Nov 2010
Posts
277
Location
West London
Project: "Desk Rad"

Description

This project combines a desk and Antec P180 case to bring watercooling to an Intel i7 processor with dual Nvidia GTX480 on a GA-X58A-UD7 motherboard. It didn't start out quite that way...

Here's the CURRENT state of the radiators behind the desk:

desk%20rad%20pics%20001%20small.jpg


Background

Two years ago I ventured into the watercooled computers with a Zalman Reserator XT, cooling a Intel Core 2 Extreme (Quad) CPU and a Nvidia 8800GTS. The kit was easy to install and the result was pleasingly quiet.

water%20cooled%20computer%20009.jpg


I also have a media PC that was 5 years old and in need of an upgrade. It ran XP on a Pentium M in a MicroATX HTPC box. It only had a small fan on the processor. The noisiest thing was the hard drive (and I've been waiting for decent sized SSDs to come down in price to address that aspect). Processing video on this setup is not realistic e.g. transcoding DVDs. Consequentially I ended up shipping the videos to the faster PC and processing them there.

Initial Plan

The initial idea was to upgrade the media PC only, but the case is small and the wife's style requirements needed to be adhered to for the room the media PC is in, plus it still had to be quiet. This led me to consider watercooling. After my experience with Zalman stuff I initially chose the Reserator 2 (a passive tower radiator come reservoir). It is a very quiet system, but there are question marks over its ability to cool today's processors.
I thought it might cool my existing Quad processor and that led me to moving the processor from my existing "fast" PC to the media PC and using the CPU block provided with the Reserator 2 in my fast PC, with the existing CPU and block moving to the media pc. This was a working plan for quite a while until I realised that the Reserator 2 was separately powered from the mains, rather than from the PC's power (as in the Reserator XT). Given that the media PC is in standby for most of the time, turning itself on and off as recordings dictate, plus leaving the Reserator 2 on all the time wasn't acceptable.

Plan 2
The second idea was to use the existing Reserator XT for the media PC (which still meets the wife's approval) and to move to a completely new setup for the fast PC.

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I always seemed sensible to me to have the radiator external to the computer case, so somehow fixing the radiator to the desk formed an early part of my thinking. I also wanted to use as many of the components I already had, including the Antec P180 case, which is far too small the house a decent sized radiator. That decision has cost me a lot of hours of work, but it's been fun.

I considered some other Reserator style products, but decided to design my own this time. I liked the look of the EK range of products and generally speaking I have bought their products. The initial shopping run included:

• Gigabyte GA-X58A-UD7 v2.0 Motherboard
• Intel Core i7 980X 3.33G 12MB
• Corsair 12GB (3x4GB) DDR3 1600 DOM DHX
• EK CoolStream Radiator XTC 420mm (fits 3x 140mm fans).
• EK-Supreme HF Nickel CPU block
• EK-DCP 4.0 12V DC Pump
• OcUK Watercooled GTX 480, which comprises ASUS Nvidia GTX 480, EK full cover (Ni/Plx), Nickel backplate, single slot bracket (this product is no longer available).
• 3x Scythe Slip Stream 140mm 1200 RPM
• Corsair AX 1200W PSU

Xmas2010computerbuild.jpg


I also opted for 10/13mm tubing and compression fittings. I thought that the main restrictions to flow would be the all the blocks and connections rather than the size of the pipe. Some people seemed to have trouble with compression fittings being too close together to easily work with and there seemed to be little difference in the bend radii of the larger and smaller tubes. However the main reason was that I decided to try out the watercooling block that came with the motherboard and this recommended 7mm ID tubing, so I thought the 10 mm ID might be OK with a good clamp. I knew that 8mm ID tubing (Zalmans was OK, so I might be able to use that at a pinch for some of the loop. As it turns out the 10mm ID tubing is fine with the Gigabyte block and I've had no leaks so far, so I am happy with that aspect.

I bought clearflex tubing, but I am not 100% happy with it. The walls aren't as rigid as the Zalman tubing, which means you have to be careful when bending it or it will easily fold over and stop the flow.

• 6m ClearFlex60 tubing 12,7/9,5mm (3/8"ID) clear
• 10x 13/10mm (10x1,5mm) compression fitting outer thread 1/4 - knurl
• 2x coupling Koolance 13/10mm (3/8") male - black nickel
• 2x coupling Koolance 13/10mm (3/8") female - black nickel
• EK Water Blocks EK-Reservoir for Phobya DC12-400 / EK DCP 4.0
• 2x 13/10mm (10x1,5mm) compression fitting 45° revolvable outer thr
• 13/10mm (10x1,5mm) compression fitting 90° revolvable outer thr
• 3x Enermax T.B.Silence UCTB14 ( 140x140x25mm )

Unfortunately the Scythe Slipstream fans I bought for the radiator had to be returned because their holes were for 120mm fan housings rather than the 140mm I needed for the radiator. I went for the Enermax T.B.Silence fans instead, which are very quiet.

Water%20cooling%20and%20snow%20004.jpg


I installed the radiator behind the desk and used the Koolance couplings to allow the desk and computer to be separated. The Reserator has the same sort of couplings, which gave me the idea for this project.
I subsequently bought another ASUS GTX 480, EK full cover block and back plate and EK-FC links and bridge (although I bought the wrong bridge first time...). The new bridge arrives tomorrow, so I will hopefully be installing it then.
I made a few mistakes during the preparation and installation of the radiator behind the desk...

Mistake #1

I followed the radiator cleaning guide on the stickies on this site, which call for the radiator to be filled with vinegar and left for 6-8 hours. The result was very blue/green cloudy water:

radiator-cleaning.jpg


It also appeared to discolour the blanking plugs:

plug-after-vinegar.jpg


No actual harm was done, but I think it was over aggressive.

Mistake #2

I was a big careless when installing the fans onto the radiator and used the wrong length M3 bolt. I didn't think I had tightened them too much but during my leak testing I discovered that I had punctured the radiator with one of the screws....

Broken%20radiator%20003.jpg


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So that meant a second radiator, which at least meant I could clean it differently! I also opted to use some rubber washers between the fans and radiator to make sure the bolts didn't get anywhere near the actual radiator.

Reservoir

My original plan was to have only the radiator (and fans) attached to the desk, with the pump and reservoir inside the case. This dictated the size of the reservoir and to be honest I regret getting such a small reservoir. It takes at least 3 fills of the reservoir to get water into a drained system, which is tedious at best. And if you are careless and leave the reservoir on the floor when you open the top to fill it, the water rushes out of the system and into the reservoir and from there over the floor! I only did this once, but that was enough.

Plan 3:

So I revised the plan and placed the pump and reservoir (which are effectively a single unit) behind the desk alongside the radiator. I managed to pick up a 15cm radiator shelf from Wickes for £3 which was a perfect fit behind the desk.

water%20cooling%20case%20and%20desk%20mods%20008.jpg


I could place the pump on the desk for filling, but I needed to move the desk to get at the pump and reservoir, so I have hatched yet another plan which is yet to be put in place.

Plan 4:

The third idea for the reservoir is to place the pump and reservoir at the side of the desk, where there is already access and to extend the size of the reservoir to reduce the need for repeat fillings. I have bought a EK Link and EK reservoir extension to add over 140 mm to the length of the reservoir. The reservoir will now extend above the desk height and will therefore be the highest point in the system.

Case mods

The Antec P180 has a separate section at the bottom of the case housing the PSU and a drive caddy, holding up to four 3.5 inch drives. Between the PSU and the drives is a fan (see the photo above of the original system). Unfortunately the 1.2 kW PSU is a lot larger than the previous PSU and this meant the central fan had to go. The PSU does have its own fan, but I was concerned that it might get a bit hot so I decided to place a fan at the front of the case blowing air over the drives towards the PSU. There is almost enough room for a fan to be placed right up against the steel grill at the front of the case. Unfortunately the drive caddy wouldn't quite fit, even when I shaved off a bit of the fan with my Dremel.

So I had to move the drive caddy about 1cm towards the PSU to give sufficient room for a normal 120mm fan. I did this by moving the plastic runner 1cm to the front of the caddy. This involved making 16 M3 tapped holes for the M3 bolts holding the plastic to screw into. Once I formulated this plan it actually went very smoothly, even though the steel of the caddy is quite thin, leaving the distinct possibility of striping the thread.

water%20cooling%20006.JPG


I also found that the fan made a nasty noise when attached directly to the steel grill at the front of the case, so I made my own brackets to provide holes in the right places for the fan and to move it slight further from the grill.

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I found that I could use the rubber fan holders with this arrangement, hopefully providing some soundproofing from vibration.

I did also remove the second drive caddy to provide space for the pump and reservoir (although I have now moved them onto the desk). That caddy could be replaced if I ever get more drives now that the pump is elsewhere, but for now the extra air space is good.

Pump control

Having heard the pump while testing out the radiator, I decided that I needed to be able to control it. I saw mCubed's bigNG as something powerful enough (my pump uses 18 W) and flexible enough for my needs. The bigNG does indeed seem powerful and flexible but the accompanying software leaves a lot to be desired. I am still getting to grips with it, so you will see some more postings on that subject later. It is very early days for this set up, but at the moment it is controlling my pump and radiator fans and it has decided to turn both OFF twice, leading to the water temperature recorded on leaving the case rising to 29 deg C! I need to fully understand why that might be.

water%20cooling%20008.JPG


To follow

There will be more to follow:
1. New location for the reservoir
2. Installing the second GTX.
3. Configuring and using the bigNG.
 
Last edited:
Ouch on the mistake with the rad :(... This look tho I can't w8 to see it.. More pic plz

I was totally gutted about the rad and my wife wasn't very pleased. However I bought the rad with Amex and so I managed to get the money back via their purchase protection. I'm not sure they really understood what I was talking about but they just refunded me ere and then - no forms to fill out....

Phew
 
I was totally gutted about the rad and my wife wasn't very pleased. However I bought the rad with Amex and so I managed to get the money back via their purchase protection. I'm not sure they really understood what I was talking about but they just refunded me ere and then - no forms to fill out....

Phew

might be reading it wrong but you saying you punctured the rad, and then got a refund because you broke it? :confused:
 
might be reading it wrong but you saying you punctured the rad, and then got a refund because you broke it? :confused:

Amex do 100 days purchase protection which means if you accidentally damage something then you can get a replacement. Leastways that's what I thought it meant and managed to convince them by drawing an analogy to dropping a vase...

I wouldn't like to rely on this working all the time but it did the week before Xmas..
 
As requested, here are a few more photos of the computer innards..

water%20cooling%20case%20and%20desk%20mods%20004.jpg


Note the Gigabyte waterblock on the Northbridge. It has narrow barbs, but big enough to get a watertight fit with my 10/13 tubing plus some Zalman tube clamps.

You may also notice a lack of cables from the power supply. One of the things that attracted me to the Corsair PSU was its cable management. That and its efficiency - 92% I believe. I'll see if I can find the review that convinced me to go with it and post it.

water%20cooling%20case%20and%20desk%20mods%20005.jpg


Tomorrow I get the correct EK bridge so I will be able to install the second GTX 480. I'll also be moving the pump and reservoir. I'll post some pictures next year with the results....
 
I have the same pump/res, i find it really really hard to screw the top on fully, bruised my hand up bad ... will be keeping an eye on this.

When I first got the reservoir I found the top so hard to undo I wondered wheher it should come off, so I asked EK support. I think I used rubber gloves to get it off the first time.

Later I noticed a small amount of leakage from the top. That really put me off installing the res in the case. That, and the fact that filling/bleeding the system was such a pain led me to move the pump and res to the desk... And then to the corner of the desk, where it is now, along with the EK LINK and reservoir extension I received on Friday. They are both now installed and bleeding the system is sooooo much easier... I wish I'd done it that way the first time!

With the extension I can afford to leave some air in the top of the reservoir, so there's no chance of a leak from the top.

I have taken more photos, but I need to get the computer booting again now that I've installed the second graphics card and bridge.

John
 
Looks good.... How far away is the rad going to be from it all?, just an idea but I don't know the lay out of your room but what about having the rad near or under a window as it will cool the rad even more.

The desk is up against an external wall of the house. Putting the desk by a window isn't really an option in this house as all the windows have a central heating radiator immediately below them. I will post a photo of the room once everything is in position.

I did toy with the idea of putting the radiator outside but I think the wife might have objected to that idea!
 
The desk is up against an external wall of the house. Putting the desk by a window isn't really an option in this house as all the windows have a central heating radiator immediately below them. I will post a photo of the room once everything is in position.

I did toy with the idea of putting the radiator outside but I think the wife might have objected to that idea!


out side, that could interesting idea!, why do women have to put a downer on everthing :(... i think my wife would be the same!!...
Or
buy a mini fridge and put the rad inside it, i have a cheap mini fridge and the temps are 10'c...
 
The new reservoir is now in place and I am very pleased with it. It is so much easier to bleed the system and you can see at a glance whether there is any pump activity.

radiator%20and%20reservoir%20008.JPG


I got the EK tube clamp at the same time as the tube extension and the EK LINK adaptor. I screwed the clamp to the side of the desk, which was great for holding the reservoir, but as it is attached to the pump I found that the pump vibrations were being amplified through the clamp to the desk. I rectified this by using some rubber washers - one for the screw and another two on either end of the clamp base and two on each clamp arm.

One thing I did NOT get was some G1/4 plugs to stop up the 2 extra holes created by installing the EK-LINK piece. Luckily, as I had the "spare" radiator I also had 2 spare plugs. So that's something to be bear in mind and seems anomolous to EK's other offerings, which in general appear to be come with everything required.

So the back of the radiator now looks as follows:

radiator%20and%20reservoir%20006.JPG


I then went on to install my EK bridge to make two GTX 480s twinned via SLI.

water%20cooling%20sli%20001.JPG


To make this installation as easy as possible, I temporarily removed the bigNG, but I now have it back in position. I now need to do some cable management.

water%20cooling%20sli%20013.JPG


John
 
Looking good so far, I like how you point out your mistakes. Hopefully I won't make the same ones when I eventually move over to water cooling. I like the idea of having the rad behind the desk, it could be a good way for me to go as I only have a mid tower.
 
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