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post #21 of 73 (permalink) Old 02-06-2013, 10:34 PM
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Doesn't change the fact that if you turn up the rpms on the 655 it has more pressure. It's a better pump in every way.

Either way, psi is irrelevant. On my next build I'll have 3 blocks and 2 rads and still run my 655 on the first speed level.

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post #22 of 73 (permalink) Old 02-06-2013, 10:35 PM
 
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Quote:
Originally Posted by Sean W. View Post

Doesn't change the fact that if you turn up the rpms on the 655 it has more pressure. It's a better pump in every way.


You need glasses maybe? That's 4.5psi at 12V, you can't turn it up anymore than that. D5 has the least dynamic head pressure of all the standard pumps, end transmission.

However Electrocutor, I thought it was 4.5psi at 1.5gpm?


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post #23 of 73 (permalink) Old 02-06-2013, 10:36 PM - Thread Starter
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Thanks for all of the input! After much deliberation, here is the final order. I changed the reservoir to keep with the full EK CSQ theme and also the pump-top. Can't wait to start working on this and modding the case a little.


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post #24 of 73 (permalink) Old 02-06-2013, 10:42 PM
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I've had two mcp355 pumps before. Just got my first mcp655. It's better in everyday. Highly recommend you switch if you can afford it.

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post #25 of 73 (permalink) Old 02-06-2013, 10:54 PM
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Quote:
Originally Posted by Electrocutor View Post

... except those aren't his components...




A single D5 yields 4.5 psi at 1gpm when running at a full 12v.
Each video card drops pressure by 1.1psi at 1gpm. That leaves 1.2psi in 3xseries.
The CPU block drops pressure by 1.8psi at 1gpm.

Now you're at -0.6psi and still have to account for radiators, tubing, fittings, etc. That means running full out at 12v, you won't get 1gpm out of a single D5. You'll either want to get two D5s in series (which you can then run both at a lower speed), or go for an MCP35X. Otherwise, you could put your video cards in parallel; but that means that each one will only get 1/3 of the flow.

You could, of course, just keep it as-is and run a single D5 on max 24/7 and be content with somewhere around 0.7-0.8gpm too.

Except those aren't the components either ... you are quoting figures for a more restrictive CPU and in the chart you posted the EK FC680 is less restrictive than the EK supreme HF so that means less than 1 PSI at 1GPM
Edit: No Actually the 680 and the Supreme HF are about the same but still less than 1 PSI

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post #26 of 73 (permalink) Old 02-07-2013, 08:32 AM
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Except those aren't the components either
He changed his CPU block in the second parts list; the original list he posted used the LTX.

As for the 680, I'm not sure where you're looking. 1gpm is about 225 l/h, and 75 mbar is about 1.1psi.

... but in the second list, he's using an mcp35x, which will have enough pressure.
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post #27 of 73 (permalink) Old 02-07-2013, 08:49 PM
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He mentioned he wasn't using the LTX earlier. The point is a D5 is plenty of power for 4 modern blocks and a couple of rads and quieter.

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post #28 of 73 (permalink) Old 02-09-2013, 09:01 AM - Thread Starter
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Does anybody know of a trick to change the color of the glowing 'ROG' logo on the Maximus IV motherboard? (I realize it can be turned off in the bios, but I'd love to just change the color)

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post #29 of 73 (permalink) Old 02-09-2013, 09:12 AM
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Quote:
Originally Posted by Sean W. View Post

Doesn't change the fact that if you turn up the rpms on the 655 it has more pressure. It's a better pump in every way.

Either way, psi is irrelevant. On my next build I'll have 3 blocks and 2 rads and still run my 655 on the first speed level.
Its does not have more pressure the mcp355 does.
Facts before opinions.

Also psi is relevant .
Thread done by DuckieHo
Quote:
All pumps list their pump rate but not all pumps list their head. Why? Flow rate is usually a nice big number... but is an absolutely useless value without a head value
https://www.overclock.net/t/150100/info-pump-head-vs-flow-rate

Example look at the Iwaki WMD/MD 20 RLZ in terms of flow vs psi


The mcp355 is a better pump. It comes on top because of head pressure. Mcp655 comes close to the mcp355 because of the gph.

<div class="post-sig post-sig-limit shazam usersig-click"><div class="reparse-sig-lineheight"><p><a href="https://www.overclock.net/water-cooling/913181-water-cooling-guide-noobs.html#post11984918">Water cooling guide for noobs,parts,setup install case suggestions,etc</a></p><span></span><p><a href="https://www.overclock.net/water-cooling/962044-upgrade-time-update-2-3-18-a.html">Case labs TH10/ build log (2 gtx 590s) water cooling oh my</a></p><span></span><p><a href="https://www.overclock.net/water-cooling/528648-heatkiller-club.html">Founder of the Heatkiller Club</a></p><span></span><p><span>W</span><a href="https://www.overclock.net/water-cooling/601449-water-cooling-cases.html">ater cooling case suggestions</a></p></div></div>


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post #30 of 73 (permalink) Old 02-09-2013, 09:15 AM
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Originally Posted by Jameswalt1 View Post

Does anybody know of a trick to change the color of the glowing 'ROG' logo on the Maximus IV motherboard? (I realize it can be turned off in the bios, but I'd love to just change the color)
I cant say for sure but unless you take it apart and change the led the color wont change.


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