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Obsidian 500D RGB plus HX1200i plus H150i Elite Capellix


Dr John
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I am putting together a system with 3 Corsair parts that need USB 2 headers, but I only have 2 headers on the motherboard. I need USB connections for the Commander Core that comes with the Capellix AIO cooler, for the Commander Pro that comes with the 500D case, and for the HX1200i power supply. My question is, can one of the USB connections (for example the one from the power supply) be connected to one of the USB ports on the Commander Pro? I want everything to show up in iCue, and I am just not sure that will work using one of the USB ports on the Commander Pro. The other option is to buy a powered internal USB hub, but I would rather use the ports on the Commander Pro if possible. Any help would be greatly appreciated. Thanks!

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You can give it a shot but there are well known issues with the CoPro USB headers. That said, they do sometimes work, especially when connecting a PSU to it.

Many of us use an internal powered USB hub. They are just too darn handy and really just resolve all kinds of issues. Well worth the money, IMHO.

Edited by DevBiker
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Thanks very much DevBiker. Just turned the system on for the first time. Everything boots to the BIOS fine, but the cap on the pump head was flashing red, and the CPU temp went up quickly, so I shut it down. Tried a different power connector to the Commander Core, and then it booted with the normal colors on the pump head for about 20 sec. Then it went back to flashing red. I don't hear any pump noise when it is on.

The Commander Core is hooked up to power and the pump head, and since the lights on the pump head work, it must be getting power. I would really like to hear the pump come on, but so far it is silent. The Commander Core and the Commander Pro are both hooked directly to USB headers on the motherboard (Crosshair VIII). Right now all 5 of the fans are on the Commander Pro and only the pump head is in the Commander Core. Do I need to have at least one fan connected to the Commander Core to get the pump to work? Thanks.

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Update. I went ahead and put one Corsair fan on the Commander Core and now everything seems to be fine. All fans lighted and the CPU temp is steady at 39C. Interestingly, I still don't hear the pump at all, so it must be very quiet. In any case, it looks like now I can finish up the final wiring and get Windows 10 installed. 

Thanks for the help. By the way, one more thing, I was watching a video that highly recommended having the radiator positioned so the tubes came up from the bottom of the case, rather than down from the top.. The point being that air in the system will go to the top where the feed hoses go to the CPU. Should I reverse the radiator orientation, or does the Capellix work well when the tubing comes from the top? It will be a more difficult arrangement to get the tubes to go around the video card and memory if I reverse the radiator, but I think it will be possible. 

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If the top tank of the radiator, where the tubes connect is higher than the pump, it's fine. The point in the GN video is to remind never to have the pump be the highest point of the loop.

 With 360mm AIOs, it's pretty much impossible to have the pump higher than the rad, in most cases.

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Glad to hear that it's sorted. It's quite odd that adding a fan fixed it. Was it to the RGB or the PWM headers that you added it?

As for the radiator hoses - that's physics. The pump can't change how physics works. Yes, it is better if they are on the bottom. But the difference really isn't that great ... even Steve came back and said that people were making too much of it. So ... if you can, put them towards the bottom. If it's not feasible, just try to make sure that the intakes are higher than the pump. And you should be able to do that with the 500D. If the pump is the highest point, air bubbles can get trapped in there ... decreasing efficiency and lifetime (possibly) and increasing noise (definitely).

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Thanks for getting back to me. I just added one fan to the Commander that comes with the Capellix, previously all had been on the Commander that comes with the 500D case. I assumed it was because the Capellix thought there was no cooling on the radiator. I had bolted the radiator directly to the fan assembly at the front of the case, so I wired all the fans to the Commander that came with the case. Now I think I will move the 3 front fans to the Capellix Commander, and leave the other 3 case fans on the Commander in the case.

The hoses exit the radiator about 3 inches higher than the pump, so the pump is definitely not the high point. I also don't hear any liquid or pump sound, so I assume any air bubbles in the system are not getting pumped through the pump head. 

Thanks again!

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