[rpalamara]

I was considering three pump setups: a single MCP655, 2 MCP655s, or a Iwaki RD-30. The Iwaki and two MCP655s dump a similar amount of heat, but the Iwaki is a more powerful pump (needs a separate power supply though). I did some calcs and came up with this:

Tell me if you find anything wrong
(based numbers off reviews and specs from manufacturers)

Using a Storm and 2 Silverprops (used Swiftech MCW55 numbers) and a MCR220

MCR220 (from swiftech site)
@ 1 GPM = .0375 C/W
@ 1.5 GPM = .035 C/W
@ 2 GPM = .034 C/W

Storm GPU block
@ 1 GPM = .13 C/W
@ 1.5 GPM = .12 C/W
@ 2 GPM = .11 C/W

1x MCP655 will run at 1 GPM and produce 15 Watts
2x MCP655 will run at 1.5 GPM and produce 30 Watts
1x Iwaki RD-30 will run at 2 GPM and produce 35 Watts

Now I am estimating that the CPU will produce 150 Watts and the two GPU cores (volt moded) will produce 180 Watts combined

1x MCP655
150 Watts x .13 = 19.5ºC
345 Watts x .0375 = 12.9ºC
19.5 + 12.9= 32.4ºCaa for CPU

2x MCP655
150 Watts x .12 = 18ºC
360 Watts x .035 = 12.6ºC
18 + 12.6= 30.6ºCaa for CPU

1x Iwaki RD-30
150 Watts x .11 = 16.5ºC
365 Watts x .034 = 12.4ºC
16.5 + 12.4= 28.9ºCaa for CPU

If the CPU is producing 200 Watts

1x MCP655
200 Watts x .13 = 26ºC
395 Watts x .0375 = 14.8ºC
26 + 14.8= 40.8ºCaa for CPU

2x MCP655
200 Watts x .12 = 24ºC
410 Watts x .035 = 14.4ºC
24 + 14.4= 38.4ºCaa for CPU

1x Iwaki RD-30
200 Watts x .11 = 22ºC
415 Watts x .034 = 14.1ºC
22 + 14.1= 36.1ºCaa for CPU

Due to the amount of heat I was even thinking about getting a 120.3 PE. From what I had read the numbers for this radiator are approx 30% better than the 120.3 HE. So these are estimations off of Cathars numbers for the 120.3 HE.

If the CPU is producing 200 Watts

1x MCP655
200 Watts x .13 = 26ºC
395 Watts x .023 = 9.1ºC
26 + 9.1= 35.1ºCaa for CPU

2x MCP655
200 Watts x .12 = 24ºC
410 Watts x .022 = 9ºC
24 + 9= 33ºCaa for CPU

1x Iwaki RD-30
200 Watts x .11 = 22ºC
415 Watts x .021 = 8.7ºC
22 + 8.7= 30.7ºCaa for CPU

These seem to be big differences in temps through the different pumps. I realize that it would be a waste if the heat produced wasn’t so high, but from asking around and estimating off of some white papers this was what I came up with. The final CPU block is going to eventually be a G7 Storm but these are the numbers I have for now.

Any input as to whether these numbers are in the ballpark or way off, or whether I am calculating things correctly would be greatly appreciated.

Thank
Ryan