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Flow Rate Estimator Spreadsheet V1.7 - Page 12

post #111 of 125
Ohh... nice.
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post #112 of 125
This looks pretty cool...although I have no idea how to use the information it is giving me.
post #113 of 125
Thread Starter 
For general use, you can do a few things.

For the very basics, just plug in your parts and see what your flow rate is. If it's over 1GPM, generally it's going to work ok.

If you want to know how much more pumping power would bring you. Plug in your parts, and your fan speed. Now try the pump you currently have and note what the CPU temp says. Now add another pump and see what it says. The difference you gain in temp is about what you might see.

For radiators. You'll need to spend some time figuring out the heat load you've got. The sheet includes a link to a PSU calculator you can use as a rough guess. Or if you know more about heat loads, put in what you want. Then you can try different radiators and fan combinations. In the end the lower the water-air delta the better. In general most people say a 10C water-air delta is acceptable, 5C is considered high performance, 2-3C extreme water cooling performance.
    
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post #114 of 125
Thread Starter 
Small update: v4.1 now uploaded to the original post bottom.
-Corrected some minor misprints.
-Added some helper comments to a few fields
-Added a fan CFMvsRPM chart in the bottom
-Added "Fan Mod" fields so you can correct for shroud, or push/pull improvements with some guides in the comments.

Currently looking into ways of more automatically correcting for different fans. I'd probably have to build a database of rad CFM vs RPM equations to do it though...we'll see.
    
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post #115 of 125
Quote:
Originally Posted by Martinm210 View Post
For general use, you can do a few things.

For the very basics, just plug in your parts and see what your flow rate is. If it's over 1GPM, generally it's going to work ok.
Hi Martin,

Thanks for the great work (again!).

Btw, I just did a test for my setup. I have 2 weak pumps (the MCP350s) and I run them in tandem. Turns out they give a slightly lower delta vs the MCP355s due to lower heat output. Was pleasantly surprised since I didn't have much of a choice since they came with the MCR320 Drives.

Wes
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post #116 of 125
Thread Starter 
Great to hear, the 350's are great pumps..not weak at all....especially a pair in series..

FYI, found out the tubing components were broken, so I did a quick fix and uploaded the fixed file.

With all the recent changes, it'll probably take a while to work the bugs out.
    
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post #117 of 125
I've played with your spread sheet in the past but never compared it to my own findings. It's scary accurate. I put in my configuration with an estimated 200w heat load. Setting 25% for fan speed due to push pull and it spit out 3C. IIRC that's the drop I saw. I estimated my YL D12SLs run around 600rpm as 5v and 1400rpm at full bore. Tried both and it told me an 8C difference in water delta. When I tested 5v vs 12v I saw an 8C reduction in Prime95 load temps. I will now happily side-grade to a CPX pro from my DDC3.2 knowing I won't lose any performance!

Your work is much appreciated Martin
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post #118 of 125
awww, no XSPC RX480 :/
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post #119 of 125
thanks mate...some updates needed though EK FC 5970 not listed and MCP355X... sniff
    
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post #120 of 125
Thread Starter 
Quote:
Originally Posted by elysion View Post
thanks mate...some updates needed though EK FC 5970 not listed and MCP355X... sniff
I requested an MCP35X for testing (actually looking to do some noise based testing with it), I can add that in there if I get one. Regarding the EK, just use one of the other EK FC blocks. There is generally very little difference on the FC blocks between the same manufacturer. It'll get you close enough.

It's only a rough estimate anyhow.
    
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