[Long Haired Git]

[This post is a repeat of the original post but corrected}

No C/W graph for the PA160.1
No C/W graph for the Polar FLo TT VGA block
Approximator doesn't yet have the Aquastream 50Z-DC12 (I've got the figures though)
So I can't approximate the loop you describe.

Instead, here's an approximation of a similar loop to show the effects of a second rad when the fan speeds are low (5v).

Personally I think the wattage's suggest are over the top, but if someone can point to something credible to show them I will re-evaluate. Until then, I am using 110W for the CPU (highest my approximator handles) and 70W for the GPU.

MCP655 @ 5
Swiftech Storm on 110W
MCW6002-64 as a GPU block on 70W
1.5m of 1/2" tubing
Single MCR220QP with dual fans.

Flow rate = 5.5 LPM (that's better eh BillA!)

Fans @ 5v:
Water temp at CPU entry = 13.2°Caa (above ambient)
CPU temp: 28.3°Caa
GPU temp: 24.8°Caa

Fans @ 7v:
Water temp at CPU entry = 9.0°Caa (above ambient)
CPU temp: 24.1°Caa
GPU temp: 20.6°Caa

Fans @ 12v:
Water temp at CPU entry = 6.3°Caa (above ambient)
CPU temp: 21.4°Caa
GPU temp: 17.9°Caa


Analysis: Definately room for an extra radiator.


So, lets drop in a second MCR220QP radiator with dual fans and add in 50cm more tubing.

Flow rate = 5.2 LPM

Note that from now on, I'll just report the water temp at the entry to the CPU.
The CPU itself runs approx 15.1°C warmer than the water, and the GPU similarly runs 11.6°C warmer than the water temp.


All Fans @ 5v = 6.5°Caa
All Fans @ 7v = 4.4°Caa
All Fans @ 12v = 3.0°Caa

Analysis: Water temperature is halved, as radiator power is doubled. Simple really!

The law of diminishing returns then kicks in hard. For laughs, lets add in up to seven MCR220QPs with dual fans and 50cm of tubing each and see what happens.

FLOW RATES:

One = 5.5 LPM
Two = 5.2 LPM
Three = 4.9 LPM
Four = 4.7 LPM
Five = 4.5 LPM
Six = 4.4 LPM
Seven = 4.2 LPM


FANS AT 5V:

One = 13.2°Caa
Two = 6.5°Caa
Three = 4.2°Caa
Four = 3.1°Caa
Five = 2.4°Caa
Six = 2.0°Caa
Seven = 1.6°Caa


FANS AT 7V:

One = 9.0°Caa
Two = 4.4°Caa
Three = 2.8°Caa
Four = 2.0°Caa
Five = 1.6°Caa
Six = 1.3°Caa
Seven = 1.0°Caa


FANS AT 12V:

One = 6.3°Caa
Two = 3.0°Caa
Three = 1.9°Caa
Four = 1.4°Caa
Five = 1.0°Caa
Six = 0.8°Caa
Seven = 0.7°Caa


So a case can be made for a second radiator, and for the extreme cooler a third radiator, but a fourth radiator is kind of hard to justify.

Shame there are no PQ and C/W tests for 120.3 radiators....

As per another thread, let me supply one MCR220QP and one MCR120QP with fans @ 7v and no tubing between the two to "approximate" a 120x3 low flow optimised radiator:

Flow rate = 5.0 LPM (that's better eh BillA!)
Water temp at CPU entry = 5.7°Caa (above ambient)


Hmmm, tempting?