Whats going on with my loop ?

Jamin280672

Jamin280672

Jamin280672

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So im running a Mo-Ra IV 200 with a D5 pump, I also have a DDC 4.2 inside the case running to help things along, so ive posted a picture below of the setup to make it easier to understand, the part I dont get is when I first switch the system on im getting about 4.0 litre / min, and slowly it slows down to around 2.3 litres / min..........whats going on with that, especially with 2 pumps running, the only restrictive things I have in my system is 1 x 90 degree, 1 x 45 degree and my 2 QD3's, unfortunately theres nothing I can do to change this, ive re-routed the pipes and flow meter 10 times over the last couple of days, nothing makes it better, some even made it beyond stupid worse where im only getting 0.80 litres / min, any help greatly appreciated.

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Thanks for the reply, both pumps are at full speed, they are silent so it doesn't bother me running them at full speed, the one in the PC is a DDC 4.2 and runs of molex, it just has an RPM cable to monitor speed only not adjustable, and the one on the Mo-Ra is an XSPC D5 vario, obviously the same, just has an rpm cable to monitor speed, not adjustable except for the red dial on the back of it.

Without the DDC switched on, I'm getting about 1.2 L/min, the DDC makes up for the difference taking it up to around 2.3, but often starts around 4 and slowly drops to 2.3 L/min

The way the flow runs is from the pump res combo with the DDC in the PC, to the ram water block, then out to the MoRa to be cooled, pushed back into the PC with the D5 and through the CPU block then back to the pump Res with the DDC in the PC, sorry if I sound dumb, but I'm not sure if this is series or parallel.
 
Turns out the issue is my CPU water block, it's a thermal grizzly direct die AM5 Pro, and for some reason it's blocked, well that didn't last very long at all, maybe 6 months at the most, very strange as apart from the mayhems clear UV blue with a couple of drops of mayhems blue dye in it that I'm trying to run through it now, the only other coolant it's had in it is xspc yellow which I flushed out using distilled water, anyway I've had to order another one (not cheap) as they can't be taken apart to clean them out.

PRocess of elimination, I tried without the ram block and experienced the same issues, tried without the front pump and res, same issues, and then tried without the CPU block attached, the coolant shot through at high speeds without the CPU block connected,
 
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Incomming pictures with explanations lol.

So last night whilst doing some investigations, I found this review about this water block and how it changed and improved from the original block:
Looking at the image of the cold plate, I thought well there isnt 8 screw holes, theres only 4, however this block has a black protective surface on the bottom of it to protect the motherboard from the metal sides sitting against the motherboard, so with a scalpel I peeled away the black surface to reveal 4 tiny little screws, undoing these the block fell apart, and low and behold, its was blocked, good and proper, so I threw the cold plate into a pool of IPA for an hour and then gave it a scrub with a toothbrush, kind of back to new and unblocked now, so the only query I have now is how to get around if its going to be safe to use without the black protective tape on the bottom ?

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haaammit said:
If you were worried about it you could either use Kapton Tape, insulating tape or something like Plastidip Paint that you could peel off and re-apply after you subsequently split the block for future cleaning. Or see if there's anything metallic under where it sits on the CPU and just not bother if there's nothing there
Click to expand...

Thanks, never heard of plastdip, I may have a look at that.

I messaged TG customer support just after posting this here this morning, they've replied asking for pictures of the bottom of the block where I removed the protective tape and my invoice, sounds kind of promising, they have also said don't use the block without it on, they advise you just flush to clean it out, but as I said, I tried that and it didn't work, dismantle was the only way to clean it, bit of a catch 22 really, maybe they should reconsider the design and put the screws through the top instead with some plastic or rubber bungs to hide the screws if they don't want them on show.
 
So I ordered another block, if by some chance TG send me a new one i'll just sell it on, but.........PMSL, ive posted a picture of the new block vs my old block, and the stock picture, I guess they realized there mistake at some point and changed the sticker on the bottom of the block, I only said in an earlier post they needed to redesign it to make it serviceable.

EDIT: Oh and the culprit was this complete and utter rubbish: https://www.overclockers.co.uk/cors...wcB&gbraid=0AAAAADv6Y8WHd0O8xAmIE9RI_82si8ZOC
I was really after some 13/10 EDPM tubing, but everywhere seems to be out of stock of it, so I brought this instead, what I thought would be the closest match, OMG what a waste of money, kinks galore, way too soft, and when you cut it, the material surrounding the tubing frays and flys everywhere, I guess a little fray snuck its way into the CPU water block, once wet from the coolant and flow pressure, it screwed itself up in the main centre channel of the cold plate and wouldnt move, I couldnt see it through the inlet or outlet ports, even putting a highish pressure blower on the inlet and outlet didnt budge it, the only way I discovered it was through dismantling the block.

Stock picture (how mine was):
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Bottom of new block vs my old block:
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So just a quick update, TG said glad you fixed the block and never heard anything from them again, so no new block, I didnt tell them id brought a new one.

Then I still couldnt figure out why my loop was running sloppy, reviews I was reading had people saying they were getting 300 to 500 litres an hour on there MoRa IV with worst connections than im using, one guy stating he had 5 QD3's, 2 x 90s and 4 x 45 bends, and here I was with 80-100, it was doing my head it, I knew something must be wrong, so after buying another D5, and connecting it to the MoRa, there was still no improvement, so I started testing the system again, I took the front res out of the loop, still no improvement, took the ram block out of the loop, still no improvement, took the new water block out of the loop and bammmmm !!!! 300+ litres an hour, I thought there's no way this block is blocked, so again, there I was stripping the system down again, taking the new block out and stripping that down too, low and behold, it was indeed blocked again, WTF !!!, I guess whatever blocked the first one, there was still some of in the loop, sods law, so cleaned the block out, but this time I completely drained my system down the sink, connected my fish tanks RO tap to the inlet tube in the MoRa and left it to flush my system for an hour, now the system is back up and running with fresh coolant and everything cleaned out, ive now got 5.20 L/min average, which finally makes much more sense to me.

Just waiting for some new compression fittings to arrive and then i'll be getting rid of the clear tubing and fitting some new watercool EPDM to the system, but for now, its working, time to enojoy it.

 
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