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post #11 of 28
Quote:
Originally Posted by Unicr0nhunter View Post

A single D5 is great for a typical loop with 2 or 3 blocks of restriction along with a couple rads, especially if you are running dual GPUs in parallel since the D5 has higher flow rate but lower head pressure. Once you get to around 4 blocks of restriction then you're still ok, but you're starting to hit to the point where a single D5 wouldn't be as good a choice as a DDC. Of course every block varies in restriction so I'm only speaking in general terms.

Normally you needn't factor rads into the equation as far as restriction goes, except the 360 Black Ice GTX Extreme is more restrictive than most other rads enough so that, as Martin puts it, it is comparable to adding yet another waterblock to the loop.

Also, the OP wanting to run three GPUs presents issues because it's an odd combination to be able to take advantage of running GPUs in parallel which is something that typically works rather well with the higher flow rate but lower head pressure of a D5. If it was just 2 GPUs you'd be OK running them in parallel which adds one block-worth of restriction to the loop by halving the flow rate to each. But with 3 GPUs there's not really a better way to set them up than running all three in series which adds 3 blocks of restriction to the loop with 100% of the flow through each. At least those Hydrocopper blocks are not particularly restrictive, but they also don't perform very well comparably. I'd stay away from them in favor of an EK or XSPC waterblock personally, but that's just me.

That leaves the OP with 3 GPUs + the CPU + the black Ice rad which is essentially 5 blocks of restriction which a D5 by itself could still handle, but not as well as a DDC or dual D5s would. I wouldn't be surprised if you had under a 0.5GPM flow rate with a single D5 on speed '5' with that loop. Dual D5s or a DDC would do MUCH better. That's all I was saying.

nah no problems here with my flow rate lol. temps below or low 60's on my gpu's, I mined on them for weeks on end aswell. I have a 10w DDC lying around & all I can say its actually crap compared to my D5. I tested a small loop with it on EK HF block, EK GTX470 & 360 rad & the flow was weak. I know its not the same as the 18w DDC really but the 18w over the 10w isn't that much better really.

Op just get a single D5 trust me you will be fine!
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post #12 of 28
Thread Starter 
Quote:
Originally Posted by korruptedkaos View Post

im running a D5 on xspc cpu block /2x ek 7990's blocks/2x ek 360 rads. no restristriction problems here?

the pump set on 4 or 5 gives absolutely plenty of flow, maybe 3 blocks is more restrictive idk, but I sort of count mine as four tbh with them

as for rad restriction & whats best? I have no idea, I only have EK rads & never had any issues with them in terms of restriction

Quote:
Originally Posted by B NEGATIVE View Post

Couple of things to remember,even tho that rad has more restriction than most rads,it will not affect flowrates overall,the rad is the least restrictive thing in the loop and amounts pretty much to tubing once the CPU block is installed.
I ran dual 24v d5's thru 2 CPU blocks,3 gpu blocks in serial,2 mobo blocks and 3 480s. I took one offline and ran the other at 12v. I got a temp rise at the CPU of 1-2c. A single d5 is just fine for his proposed loop
Pressure ratings and requirements are massively overrated,especially when max specs are quoted,these are nigh on worthless values.

That said,I run a dual pump setup for good reason,lower pump speeds and redundancy are attributes I want.

Quote:
Originally Posted by Unicr0nhunter View Post

A single D5 is great for a typical loop with 2 or 3 blocks of restriction along with a couple rads, especially if you are running dual GPUs in parallel since the D5 has higher flow rate but lower head pressure. Once you get to around 4 blocks of restriction then you're still ok, but you're starting to hit to the point where a single D5 wouldn't be as good a choice as a DDC. Of course every block varies in restriction so I'm only speaking in general terms.

Normally you needn't factor rads into the equation as far as restriction goes, except the 360 Black Ice GTX Extreme is more restrictive than most other rads enough so that, as Martin puts it, it is comparable to adding yet another waterblock to the loop.

Also, the OP wanting to run three GPUs presents issues because it's an odd combination to be able to take advantage of running GPUs in parallel which is something that typically works rather well with the higher flow rate but lower head pressure of a D5. If it was just 2 GPUs you'd be OK running them in parallel which adds one block-worth of restriction to the loop by halving the flow rate to each. But with 3 GPUs there's not really a better way to set them up than running all three in series which adds 3 blocks of restriction to the loop with 100% of the flow through each. At least those Hydrocopper blocks are not particularly restrictive, but they also don't perform very well comparably. I'd stay away from them in favor of an EK or XSPC waterblock personally, but that's just me.

That leaves the OP with 3 GPUs + the CPU + the black Ice rad which is essentially 5 blocks of restriction which a D5 by itself could still handle, but not as well as a DDC or dual D5s would. I wouldn't be surprised if you had under a 0.5GPM flow rate with a single D5 on speed '5' with that loop. Dual D5s or a DDC would do MUCH better. That's all I was saying.

I feel like there is a wealth of knowledge here! This is all great information. I'm trying decipher what exactly it is that I should do though. I'm not set on any particular solution. Honestly, like I said, I could go with a different, less restrictive 360mm rad and use the MCP35X pump. If that would work, then I'd be down. If that's still not enough, I would be okay with running two pumps, I'd just need some guidance on how to make it happen.
post #13 of 28
Quote:
Originally Posted by Oklahomie View Post



I feel like there is a wealth of knowledge here! This is all great information. I'm trying decipher what exactly it is that I should do though. I'm not set on any particular solution. Honestly, like I said, I could go with a different, less restrictive 360mm rad and use the MCP35X pump. If that would work, then I'd be down. If that's still not enough, I would be okay with running two pumps, I'd just need some guidance on how to make it happen.

I personally would just get the D5, runs cooler & more reliable. the DDC's have a tendency to get hot & overheat.

Ive had most pumps out there lol. dcp 2.2 & 4.0 I ran in series together , the 4.0 died, I ran dual loops with XSPC bay/pump combo's, they died I just use them for res now, DDC's actually sometimes heat up pretty hot. It hasn't died but I really don't rate them. Hence why it isn't being used & in a box lol

D5's. nothing bad so far. runs quiet on 5, runs my loop's with decent temps. durable, quiet & well I doubt you will have any issue with it in your proposed loop.

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post #14 of 28
Thread Starter 
I'll look at a less restrictive radiator to replace the GTX 360 that I had proposed, and maybe the D5 will suffice.


Besides the pump issue, are there any other intricate details or suggestions for me?
Are the compression fittings and tubing that I have selected all that I need?
Is my solution that I have to connect the GPUs good? (This was another gray area for me personally; I had a hard time finding a definitive "you need this" for connecting the hydro copper cards to one another.

I feel like I've covered all of my bases, but I just want to be double sure.
post #15 of 28
Quote:
Originally Posted by Oklahomie View Post

I'll look at a less restrictive radiator to replace the GTX 360 that I had proposed, and maybe the D5 will suffice.


Besides the pump issue, are there any other intricate details or suggestions for me?
Are the compression fittings and tubing that I have selected all that I need?
Is my solution that I have to connect the GPUs good? (This was another gray area for me personally; I had a hard time finding a definitive "you need this" for connecting the hydro copper cards to one another.

I feel like I've covered all of my bases, but I just want to be double sure.

A d5 will be more than enough.

If you are worried about 1 360 on a D5...well.....


Here is 2 360 GTX's on a d5,along with 2 GPU blocks and a CPU block,I made this some time ago as a test bed.





They are the GTX lite edition,different side panels but the core is exactly the same as the GTX.
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post #16 of 28
Thread Starter 
It's not that I'm worried about the single 360mm GTX radiator, it's just paring that on top of 3 GPUs, 1 CPU, and a 480mm rad.
post #17 of 28
Quote:
Originally Posted by Oklahomie View Post

It's not that I'm worried about the single 360mm GTX radiator, it's just paring that on top of 3 GPUs, 1 CPU, and a 480mm rad.

You have no need to worry.

If you have the mind to spend the extra for a dual pump option then by all means go for it.
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post #18 of 28
Thread Starter 
Quote:
Originally Posted by B NEGATIVE View Post

You have no need to worry.

If you have the mind to spend the extra for a dual pump option then by all means go for it.

Not going to lie, I am playing the devils advocate here a little bit biggrin.gif.

If the single D5 will suffice, then I'm perfectly happy.

On a different, but slightly related topic, will the compression fittings be all that I need to interface with the hosing?
post #19 of 28
Quote:
Originally Posted by Oklahomie View Post

Quote:
Originally Posted by B NEGATIVE View Post

You have no need to worry.

If you have the mind to spend the extra for a dual pump option then by all means go for it.

Not going to lie, I am playing the devils advocate here a little bit biggrin.gif.

If the single D5 will suffice, then I'm perfectly happy.

On a different, but slightly related topic, will the compression fittings be all that I need to interface with the hosing?

Yes,match the ID/OD of the tube to the fitrtings. 16mm/10mm was my preferred tube when i used to use soft tube.
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post #20 of 28
Thread Starter 
Okay, so after clearing up some confusion I had with my power supply requirements, it appears that I'll be able to utilize the lower 480mm radiator slot. If I can swing it, I'd like to run two different loops.

Does anyone have any suggestions for quality bay res/pump combos?

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