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Xd3 question


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My xd5 died and I got my hands on an xd3 pump to replace it while the warranty process works it's way out. My question is can the xd3 handle three 360 radiators (2 xr5 and 1 xr7) with the CPU and GPU block?

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yes. you may struggle to refill the loop given how small the reservoir is though.

But DDC pumps have better head pressure than D5. it will actually struggle less than the XD5  (more flow at the same RPM)

Edited by LeDoyen
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That's good to know as I've never used a DDC pump before. I'll most likely run dual loop when I get my d5 pump back. If temps are decent I may just leave it as is. 

One more question, if I did run dual loops would the extra radiator of the three be better in the CPU or GPU loop? I would think the GPU would run hotter but I'm no expert on water cooling. I haven't found a solid answer on Google.

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the GPU always runs a lot hotter. But you're more likely to lose cooling performance with a dual loop.

the CPU doesn't generate much heat (if that's the one in your profile) so you're really mostly using 3 rads for the GPU right now.

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Posted (edited)
7 minutes ago, LeDoyen said:

the GPU always runs a lot hotter. But you're more likely to lose cooling performance with a dual loop.

the CPU doesn't generate much heat (if that's the one in your profile) so you're really mostly using 3 rads for the GPU right now.

Running an 11600k now paired with a 3080. 11th gen gets nice and toasty when it's overclocked.

 

I may just keep the single loop then

Edited by capricorn123290
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14 hours ago, capricorn123290 said:

My question is can the xd3 handle three 360 radiators (2 xr5 and 1 xr7) with the CPU and GPU block?

Yes, it can.  That was my first arrangement when building a O11 XL.  No issues filling or with daily management.  Where you might get into some measure of performance deficiency is if you combine that with a very restrictive CPU/GPU block.  The XD5s are higher on the restrictive side for a radiator so if you add more restriction to a 3 radiator build you will start to see some slow down in the CPU/GPU heat pick up phase and that will cost you a few degrees in component temperature.  The Corsair XC7/XG7 do not qualify as restrictive.  

Edited by c-attack
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I'm building in an o11 XL as well. All my water cooling components are Corsair except the GPU block. It's a bitspower, and doesn't seem to restrictive from what I can tell. It's the classic block for my Asus tuf 3080. 

I suppose my plan is to run all three radiators in one loop with the CPU and GPU powered by the XD3. I only ran my d5 at 50 percent when I was using two radiators do I'm hoping it works out the way I'm hoping.

Thanks for the help.

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I have one running with a 5900x and a 3090fe with 2 xr5 420mm radiators.

I run the pump at 1800 and the fans are around 600-800 - water temp idles around 35 and never goes over 42~ under load.

The XD3 gets a little winy over 2000rpm, but totally bearable upto 2200 for me (still run it at 1800~ tho )

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Yes, the XD3 is most definitely a DDC pump and you will not want it maxed out. My limit was 60% when gaming, but the good thing is it’s already generating most of is maximum pressure at that speed. 

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