How powerful a pump do i need for this setup

zigmaster · 01-24-2006, 09:08 PM

my system is a 4400+ OC 2600mhz
2 256mb 7800gtx

i plan to make the case look neat and clean
but the 3/8 tubing looks nicer than 1/2

the blocks i will be using is the storm or the apogee
2 maze 4 gpu water blocks
and a DD xtreme 2 radiator with 2 120mm fans

do you think the 3/8 tubing with a swifftech mcp350 pump will give about the same performance as 1/2 tubing with a swiftech mcp655 pump

and if the 1/2 tubing is better then by how many degrees

nikhsub1 · 01-24-2006, 09:40 PM

Wont be much diff between the 2 really. Dont go with the BIX though, you need loud ass fans to make it perform, get the BIP or a PA series Thermochill.

Long Haired Git · 01-24-2006, 11:25 PM

Approximator to the rescue (really must post this version online).
Note I have done some substitutions as I don't have PQ/CW data for your bits.

MCP350
Storm on 110W CPU (big fat guess at wattage)
2 x MCW55 each on 50W GPUs
MCR220QP with fans at 7v (this rad is probably less flow restrictive and air restrictive than yours, but I'm yet to add in figures for the DD Extreme)
Assume 2m of tubing to hook it all up.

Now, my model does not handle changing barb sizes. So, it assumes you are stretching 3/8" tubing over the storm's 1/2" barbs, and the HE120.2 model assumes 5/8" barbs. This is the coding I am doing now, but meanwhile...

3/8" tubing: 2.64 LPM, coolant at 10.27°Caa (degrees C above ambient), CPU at 26.64°Caa, GPU 1 at 10.87°Caa , GPU 2 at 11.14°Caa

1/2" tubing: 2.76 LPM, coolant at 10.26°Caa (degrees C above ambient), CPU at 26.54°Caa, GPU 1 at 10.83°Caa , GPU 2 at 11.09°Caa

W00t! Now the Apogee is a better choice IMHO for this loop. It may perform worse on the CPU or not (fight rages in other threads) but it is less restrictive for the flow rate, and 2.x LPM is not ideal.

That said, fitting a MCP655 will only know one degree tops off your CPU temp, and that's with 1/2" tubing. The best way to lower temps here is that the water temp is a bit high: suggest PA120.3 rad if my wattages are right.

stev · 01-27-2006, 12:15 PM

In a nut shell ...

Storm, use the D5 (mcp650) with 1/2" ID tubing.
Pros: D5 has speed control
Cons: D5 is large

Apogee, use the DDC-1 (mcp350) with 3/8" ID tubing.
Pros: DDC-1 is compact and powerful.
Cons: No speed control, must add separately.

For an error of 1 or 2 degrees, more or less, the 3/8" tubing works the best inside a case.

Personally, I have an external WC'ing setup. Only two tubes run in/out of the computer. Less chances for leaks to occur.

ElMoIsEviL · 02-02-2006, 08:45 AM

Just get an MCP655...lol

01-24-2006, 09:08 PM	#1
zigmaster Cooling Neophyte Join Date: Jan 2006 Location: chi Posts: 2	How powerful a pump do i need for this setup my system is a 4400+ OC 2600mhz 2 256mb 7800gtx i plan to make the case look neat and clean but the 3/8 tubing looks nicer than 1/2 the blocks i will be using is the storm or the apogee 2 maze 4 gpu water blocks and a DD xtreme 2 radiator with 2 120mm fans do you think the 3/8 tubing with a swifftech mcp350 pump will give about the same performance as 1/2 tubing with a swiftech mcp655 pump and if the 1/2 tubing is better then by how many degrees

01-24-2006, 09:40 PM	#2
nikhsub1 c00ling p00n Join Date: Jun 2002 Location: L.A. Posts: 758	Re: How powerful a pump do i need for this setup Wont be much diff between the 2 really. Dont go with the BIX though, you need loud ass fans to make it perform, get the BIP or a PA series Thermochill. __________________ :-.,_,.-:'``':-.,_,.-:'``':-.,_,.-:'``':-.,_,.-:'``':-.,_,.-: E6700 @ 3.65Ghz / P5W DH Deluxe / 2GB 667 TeamGroup / 1900XTX PC Power & Cooling Turbo 510 Deluxe Mountain Mods U2-UFO Cube Storm G5 --> MP-01 --> PA 120.3 --> 2x DDC Ultras in Series --> Custom Clear Res "Artificial intelligence is no match for natural stupidity." 1,223,460+ Ghz Folding@Home aNonForums :-.,_,.-:'``':-.,_,.-:'``':-.,_,.-:'``':-.,_,.-:'``':-.,_,.-:

01-24-2006, 11:25 PM	#3
Long Haired Git Cooling Savant Join Date: Jan 2003 Location: Sydney, Oz Posts: 336	Re: How powerful a pump do i need for this setup Approximator to the rescue (really must post this version online). Note I have done some substitutions as I don't have PQ/CW data for your bits. MCP350 Storm on 110W CPU (big fat guess at wattage) 2 x MCW55 each on 50W GPUs MCR220QP with fans at 7v (this rad is probably less flow restrictive and air restrictive than yours, but I'm yet to add in figures for the DD Extreme) Assume 2m of tubing to hook it all up. Now, my model does not handle changing barb sizes. So, it assumes you are stretching 3/8" tubing over the storm's 1/2" barbs, and the HE120.2 model assumes 5/8" barbs. This is the coding I am doing now, but meanwhile... 3/8" tubing: 2.64 LPM, coolant at 10.27°Caa (degrees C above ambient), CPU at 26.64°Caa, GPU 1 at 10.87°Caa , GPU 2 at 11.14°Caa 1/2" tubing: 2.76 LPM, coolant at 10.26°Caa (degrees C above ambient), CPU at 26.54°Caa, GPU 1 at 10.83°Caa , GPU 2 at 11.09°Caa W00t! Now the Apogee is a better choice IMHO for this loop. It may perform worse on the CPU or not (fight rages in other threads) but it is less restrictive for the flow rate, and 2.x LPM is not ideal. That said, fitting a MCP655 will only know one degree tops off your CPU temp, and that's with 1/2" tubing. The best way to lower temps here is that the water temp is a bit high: suggest PA120.3 rad if my wattages are right. __________________ Long Haired Git "Securing an environment of Windows platforms from abuse - external or internal - is akin to trying to install sprinklers in a fireworks factory where smoking on the job is permitted." (Prof. Gene Spafford) My Rig, in all its glory, can be seen best here AMD XP1600 @ 1530 Mhz \| Soyo Dragon + \| 256 Mb PC2700 DDRAM \| 2 x 40 Gb 7200rpm in Raid-0 \| Maze 2, eheim 1250, dual heater cores! \| Full specifications (PCDB)

01-27-2006, 12:15 PM	#4
stev Cooling Neophyte Join Date: Feb 2005 Location: niagara falls Posts: 96	Re: How powerful a pump do i need for this setup In a nut shell ... Storm, use the D5 (mcp650) with 1/2" ID tubing. Pros: D5 has speed control Cons: D5 is large Apogee, use the DDC-1 (mcp350) with 3/8" ID tubing. Pros: DDC-1 is compact and powerful. Cons: No speed control, must add separately. For an error of 1 or 2 degrees, more or less, the 3/8" tubing works the best inside a case. Personally, I have an external WC'ing setup. Only two tubes run in/out of the computer. Less chances for leaks to occur.

02-02-2006, 08:45 AM	#5
ElMoIsEviL Cooling Neophyte Join Date: Jan 2006 Location: Ottawa, Ontario Posts: 71	Re: How powerful a pump do i need for this setup Just get an MCP655...lol __________________ Asus P5N32-E SLI \| Intel Core 2 Extreme QX6700 @ 4.23GHz (Swiftech MCW5002-775T 226W Pelt) \| 4x1GB OCZ Special Ops DC PC2-6400 DDR2 XTC \| 2xBFG TECH GeForce 8800 GTX OC 768MB Water Cooled \| Sound Blaster X-Fi FaT@l1Ty FPS Sound Card \| 2x74GB WD Raptor 10,000 RPM RAID0 \| 2x320GB Seagate 7200.10 7,200 RPM RAID0 \| SuperCooled: Enterprise Custom Cooling

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