Liquid Coooling Dual Xeons

[RADCOM]

I am considering the following for a Dual Xeon 3.06Ghz system. Can anyone spot any flaws or advise me on improvements. I've heard that using two restrictive waterblocks isn't favourable. I was also considering a modded swiftech 350 as a pump. Should I be considering a parallel waterblock setup?

2 x NexXxoS XP Bold (waterblocks)
1 x Cape Coolplex 25 externally (resevoir )
1 x Black ICE pro III (radiator)
Eheim 1250 (pump)
Fluid XP (instead of water
1/2" or 10mm tubing?

[nikhsub1]

Ditch the Nexxxos blocks, too restrictive and won't gain you anything IMO. I'd get 2 MCW6000's, I'd use 3/8" ID tubing and run the MCP350. I dont use fluidxp, but if you must... the MCP350 is like 100x smaller than the 1250, DC and more powerful. No need for you to run 1/2" ID IMO.

[Disposibleteen]

2 Xeons will dump alot of heat into the loop, especially if you plan on OCing them at all. Having a less restrictive tubing will allow more of that heat to be dissipated, i would get 1/2" tubing and 2 MCW6002's.

[nikhsub1]

2 Xeons will dump alot of heat into the loop, especially if you plan on OCing them at all. Having a less restrictive tubing will allow more of that heat to be dissipated, i would get 1/2" tubing and 2 MCW6002's.
You wont notice a difference with 1/2" or 3/8" with the MCP350. Tubing size is less of an effect than you think.

[MaxxxRacer]

nik is right on this one. since hte 350 is rather low flow the reistance isnt that great using 3/8 tubing.. if you were using an iwaki RD30 (like nik) you would notice a big difference. but unless its a really high flow pump it wont be hurt much by 3/8.

[Disposibleteen]

but wont this limit your upgrading options, if you go all 3/8" parts and you decide that you need better flow for more heat movement you are stuck.

[RADCOM]

So do I need a more powerful pump or shall I run two 350's together? Heres a link for details on the modded pump flow rate
http://www.systemcooling.com/mcp350_mod-05.html

[nikhsub1]

One will be fine.

[Bloody_Sorcerer]

actually, nexxxos XPs are very good at low flow.
http://www.procooling.com/html/pro_testing.php

[nikhsub1]

actually, nexxxos XPs are very good at low flow.
http://www.procooling.com/html/pro_testing.php
Yes they are, but with 2 of them the pressure drop will be huge! Now that I look at the procooling graph again, perhaps the nexxxos blocks may be a good choice. Run 2 MCP350's in series would be very nice.

[RADCOM]

Yes they are, but with 2 of them the pressure drop will be huge! Now that I look at the procooling graph again, perhaps the nexxxos blocks may be a good choice. Run 2 MCP350's in series would be very nice.
Hurray my research was okay then. I am now thinking of getting an Iwaki pump but they seem to be rarer than rockin horse :banana::banana::banana::banana: in the UK. What kind of performance would I get from two modded 350's I know it wouldn't be double! Any advice on fittings and tubings?
:slobber: :toast: :slobber:

[nikhsub1]

Hurray my research was okay then. I am now thinking of getting an Iwaki pump but they seem to be rarer than rockin horse :banana::banana::banana::banana: in the UK. What kind of performance would I get from two modded 350's I know it wouldn't be double! Any advice on fittings and tubings?
:slobber: :toast: :slobber:
2 in series would be what you want. A second pump will result in a 33% increase in flow (roughly) over a single pump. You would need 4 pumps to get twice the flow. So, if for example one MCP350 would push 1GPM through the setup (seems about right for 2 nexxxos blocks, perhaps a tad less) then 2 in series would yeild you 1.33GPM, 3 pumps would be 1.66GPM, 4 pumps would be 2 GPM. IMO, adding a second 350 would be ideal as they each only add about 8W or so each and you have a big rad. 2 XP blocks, 2 MCP350's in series, 3/8" ID tubing and the Thermochill 120.3 would be an AWESOME setup and is exactly what I would do if I were in your situation.

I would use 1/2" barbs on the rad and blocks, you can get the 3/8" ID hose over them with some effort, doing this will decrease your pressure drop at the fittings. The pumps are 3/8" anyway if you go with the 350. Tygon rules, no 2 ways about it.

[RADCOM]

Very Good amigos, it's starting to take shape. Another query... whats the best radiator and why? The Black Ice Pro III, XSPC R120-T Crossflow or Thermochill 120.3. I couldn't find much on radiator comparisons. For this level of cooling I think the 3 level radiator is overkill but there isn't much difference in price. Next someone will suggest 6 fans in a push pull config :) Just thought I'll need a fan control unit too! Thanks for all your help this will keep me busy over summer.

[nikhsub1]

My vote is 120.3. Performance between it and the BIX3 are about the same, no real diff but i like the build quality of the Thermochill. I do suggest 6 fans in push pull at 7v with fan controller.

[saratoga]

Heat capacity of water is so great, the whole 3/8 verses 1/2 inch thing won't matter with the 6000s, so I'd just do 3/8 for ease of installation.

One thing I will dissent on though is the 6 120mm fans. Unless you've got some TECs on there, 3 undervolted Panaflos should be fine and a little quieter. Actually I'm generally not a fan of stacking fans. Too little benefit IMO.

[RADCOM]

Well one thing I've learnt about this forum is it's Xtreme by nature. Six fans would be a little overkill but if they were quiet.............
I bought a thermochill HE120.1 for another project and you're right the build quality is superb. I haven't actually seen the other rads so I'll ask around. I got a quote on an Iwaki in the UK:-

"The MD-20RZT is a American UL approved model not available in Europe. The
European version with CE approval is the MD 20 RZM 220N which is a 230v pump
available from our stock at a price of 260.00 GBP ex works."

bit pricey for me:(
I may go with the alphacool pump it was used in this article at madshrimp
http://www.madshrimps.be/?action=getarticle&articID=275
Alpha-cool AP1500 centrifugal pump 12Volt http://www.alphacool.de