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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.

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)