Chipset CPU flow

[Biffa]

How does this look for a flow plan?

Water goes into CPU, out to mosfet #1 then to chipset block, then mosfet #2, #3 and to rad

[wesley]

Very nice. No kinks at all.

Wes

[Biffa]

Thanks Wes, final colour will be black, the silver is just for testing, but I'll decide a bit later whether to keep it.

What about the block order? I thought I'd want to get the hot CPU first, then over to the hottish dual N200's as soon as physically possible without messing the tubing up. Then to the other mosfets and back to the rad.

[Polizei]

Thanks Wes, final colour will be black, the silver is just for testing, but I'll decide a bit later whether to keep it.

What about the block order? I thought I'd want to get the hot CPU first, then over to the hottish dual N200's as soon as physically possible without messing the tubing up. Then to the other mosfets and back to the rad.

Order like that doesn't matter one bit. Not in the slightest. The water going over all of those components is the same temperature, called the equilibrium temperature.

At a given load (idle or stress), your loop temperature will be constant - equilibrium temperature.

Water does NOT enter your CPU block at 27C and leave at 35C, enter your MOSFET block at 35 and leave at 42... it just doesn't work that way.

The difference in water temperature from radiator in and radiator out is .1C if you're lucky. Route your tubing so it doesn't kink and route it so it keeps the tubing as short as possible. Keep your pump immediately after your reservoir to aid in bleeding the loop, and you're good to go. After that, order doesn't matter at all.

[Conumdrum]

2-3C from coldest to warmest water if a loop with lots of hot parts and a rad at the end. Quite a bit more than .1C. You on the other hand will see a small amount, maybe .1C added by the mosfet then to the next mosfet then to the CPU that will add maybe 1C, then off to the rad I'm sure.

Still, routing to the CPU first really isn't a big deal, your just fine as it is.

[Johnny87au]

Order like that doesn't matter one bit. Not in the slightest. The water going over all of those components is the same temperature, called the equilibrium temperature.

At a given load (idle or stress), your loop temperature will be constant - equilibrium temperature.

Water does NOT enter your CPU block at 27C and leave at 35C, enter your MOSFET block at 35 and leave at 42... it just doesn't work that way.

The difference in water temperature from radiator in and radiator out is .1C if you're lucky. Route your tubing so it doesn't kink and route it so it keeps the tubing as short as possible. Keep your pump immediately after your reservoir to aid in bleeding the loop, and you're good to go. After that, order doesn't matter at all.

I thought it matters only with cpu block as it has inlet/outlet? So in theory would this work for say a CPU+Chipset

Cpu->Chipset->Cpu-> etc?

[Biffa]

Order like that doesn't matter one bit. Not in the slightest. The water going over all of those components is the same temperature, called the equilibrium temperature.

At a given load (idle or stress), your loop temperature will be constant - equilibrium temperature.

Water does NOT enter your CPU block at 27C and leave at 35C, enter your MOSFET block at 35 and leave at 42... it just doesn't work that way.

The difference in water temperature from radiator in and radiator out is .1C if you're lucky. Route your tubing so it doesn't kink and route it so it keeps the tubing as short as possible. Keep your pump immediately after your reservoir to aid in bleeding the loop, and you're good to go. After that, order doesn't matter at all.

Excellent, thats sort of what I had experienced, and makes sense, but as I am rebuilding the loop anyway I just wanted to be sure as I don't want to do it again for a while

Interesting about the radiator in/out temps, I would have thought that as the job of the radiator is to cool the water that it would drop the temps more substantially as it flows through.

[Biffa]

Also refering to gabes dual vs single loop thread I'm thinking of running my dual pump res in serial rather than parallel, would this work?



This should give redundancy if one pump fails, but because the inlet just goes into the joint res (old model) its not pushing water directly into the other pump. Any downsides?

So I have two 18W DDC/MCP355 pumps under the res. One would effectively be pushing the water around and the other would be pulling it back into the res. Would that setup be enough to handle CPU, mobo blocks, two radiators and 4 full cover gpu blocks? Or am I better assigning one pump to the cpu/mobo and the other to the gpus which is how I have it now?

[ooztuncer]

payback time - hope this helps (at least partly)

http://www.xtremesystems.org/forums/...d.php?t=225249

[Biffa]

Well all I can do is give it a try right?

[Soulwind]

Actual order of the loop makes minimal/no difference, not even the res before pump rule (although it does make filling/bleeding a lot easier if you follow that 'rule').

Just ensure that you are actually using the Inlet of the CPU block as an inlet.

With the jet-type blocks we're using now, getting the inlet and outlet ports backwards will have an effect on your temps.

[Biffa]

Just ensure that you are actually using the Inlet of the CPU block as an inlet.

With the jet-type blocks we're using now, getting the inlet and outlet ports backwards will have an effect on your temps.

Yeah its a XPCS Rasa, has the inlet and outle marked on the block

Cheers.

[Biffa]

So a few updates, I've got everything connected up and have done an overnight leak test and all is well. There have been a couple of modifications which I'll briefly cover but when I have a bit more time I'll throw together a worklog.

Again like most of my installs I would consider it neat and functional rather than super creatively awesome like the fantastic builds we often see

So, kept the routing the same as in the original pic pretty much, just added the radiators and the dual pump res to the mix.

This is what I ended up doing to the res. Now its done I'm not 100% whether its an effective solution, it doesn't seem to be causing any problems right now but I'm not 100% sure if its any more or less effective than having one pump for the cpu/chipset and one for the graphics cards.

But I think it looks cool!


Heres a detailed shot of the cpu/mosfet area:


And the whole shebang:


Its still bleeding at the moment, and there is much more turbulence in the reservoir than before, with a constant noise of bubbling water.

The water doesn't seem full of bubbles unless tip the case around, but I'm not sure if thats the res sucking air into the loop or the loop disgorging some trapped air into the res.

So I'm going to give it a bit of a run and see if I can get as much air out as I can, then I just recieved a part to make a drain line. Not sure where tho, I was thinking just to the right of the motherboard tray, right at the top of the lop where it goes horizontally from the res over to the inlet on the PA120.3 unless someone has better idea.

[P5ym0n]

It would appear that with your current gfx piping, you have created a short cycle at the top card which would restrict the flow to the lower cards. Water will take the path of least resistance don't forget
Flow in the top card and return from the bottom imho.

[gmat]

His flow setup is good (parallel flow works for GPU). The lowest resistance path in this case is through the 4 blocks simultaneously.

For your drain just think that you'll have to tip the case so it becomes the lowest point in your loop, makes it a lot easier. The PA120.3 is on top, am i right ?

And whoa, impressive setup, is this going to be a crunching powerhouse ?

[Biffa]

It would appear so but the temps are quite even across all cards, with them all folding at the same time and an ambient of 30°C the cards are all within a few degrees of each other, which isn't any worse than they were in serial

To flow in at the top and out at the bottom I'd have to jury rig it like the serial setup I had with a different on the bottom block with the fittings offset from the other blocks and custom loops of tubing to link it all up (like my avatar). Problem is there is no room between the bottom card and the PSU to put any connectors in

I've got a new AquaGrafx TwinConnect coming (hopefully soon) which does serial and parallel and will fit in the space (similar to the EK connectors)

At the moment though its the CPU thats getting hot

[Alexandr0s]

It would appear that with your current gfx piping, you have created a short cycle at the top card which would restrict the flow to the lower cards. Water will take the path of least resistance don't forget
Flow in the top card and return from the bottom imho.

The way this is set up should provide all cards with about the same amount of cooling.

[Biffa]

The way this is set up should provide all cards with about the same amount of cooling.

It does seem to be cooling them ok at around 60°C give or take 1°

But the CPU is getting hot, 84/81/81/83°C

Its stabilized at that temp, and its folding as well as the gpus so its not slacking

But I wonder if I hang a TFC 120 off the back fan will that have a positive effect on the entire loop to make a difference.

Also still not decided on the dual-pump-res-flow-mod as to how effective it is.

Thanks for all your comments guys.

[TJ TRICHEESE]

60c

[gmat]

That's ok given the amount of components that are being cooled there...

[Biffa]

And the ambients, if it was winter or I had aircon I reckon GPU's would be circa 45° and CPU around 65°

[Johnny87au]

biffa how are gpu temps in paralell compare to before??

[Biffa]

Not too much difference.
Redoing the loop at the moment, different order and added an extra 120 radiator off the back fan.

[Johnny87au]

All 1 Loop yeah?

[Biffa]

Dual pump res, but I removed my mod on the res. I'll explain more later when I have a bit more time. Suffice to say the turbulence and "gravelling" sound is gone