DDC Pump Version Differences & Evolution

[dsumanik]

I was just wondering if anyone out there had done any comparisions of the different version of DDC pump that have come out over the years. It would be interesting to develop a quick reference to see the actual gains/losses by the different models, even with the stock tops just to see the performance difference on the pump alone.

As far as I know this is the DDC model family??

DDC 1 = 12W Max
DDC 2 = 18W Max
DDC 3.1 = 12W Max
DDC 3.15 = 12W Max
DDC 3.2 = 18W Max
DDC 3.25 = 18W Max

Common Specs between versions:
8-13.2V, 9V startup
Max 21.75PSI
Have I missed one?

I Found these on Laing Website, the last graph is confusing as it is rated in amps..and it looks like it exceeds 18W limit in DDC 3.2 & 3.25 (1.5A):

DDC 1 & 2
DDC 3.1 & 3.2
DDC 3.1 - 3.25

Using Data from these tables I plugged them into my own spreadsheet, rounding plot points to nearest .5 ft of head pressure. So it is not Exact, but it gives you a rough idea of the rankings...based on Laing's in-house testing results.




Here are the combined results of all the data. However keep in mind both the DDC 3.2 and 3.25 have more amperage applied on this graph than the other pumps, so this data is NOT directly comparable.



As such, in reality, I would say the DDC2 is the overall winner, it hangs in there with the best of them...even undervolted.

If we go on this graphs data alone:

High Flow (> 1.5GPM) = DDC3.2 > DDC3.25 > DDC2
Average flow (1-1.5GPM)= DDC3.25 > DDC3.2 = DDC2
High Restriction (< 1.0GPM) = DDC3.25 > DDC2> DDC3.2

Looks like DDC2 was ahead of its time, DDC 3.2 is a mixed bag, DDC 3.25 overall best.

DDC1, DDC3.1, DDC3.15 all sux lol

[dsumanik]

There I answered my own questions and updated data ... Did I do this right?

[LOUISSSSS]

but wasn't the DDC2 the one w/ all the reliability issues?

and did the ddc2 really outperform the ddc3.2?

[Waterlogged]

but wasn't the DDC2 the one w/ all the reliability issues?

and did the ddc2 really outperform the ddc3.2?

Yes

and yes.

Even despite the issues with the DDC-2, those who don't mind the quirks still covet these pumps. Meet my twins that I'll never get rid of....unless they die, even then I'll probably still hold on to them. I've got 2 dead ones beside me right now for mock up purposes.



Honestly, something doesn't look quite right with that graph. It's getting late here so I'm not gonna bother looking everything over because I'll probably make some silly mistake but I'll look it over tomorrow and see if it's just me.

[Brodholm]

I was just wondering if anyone out there had done any comparisions of the different version of DDC pump that have come out over the years. It would be interesting to develop a quick reference to see the actual gains/losses by the different models, even with the stock tops just to see the performance difference on the pump alone.

As far as I know this is the DDC model family??

DDC 1 = 12W Max
DDC 2 = 18W Max
DDC 3.1 = 12W Max
DDC 3.15 = 12W Max
DDC 3.2 = 18W Max
DDC 3.25 = 18W Max

Common Specs between versions:
8-13.2V, 9V startup
Max 21.75PSI
Have I missed one?

I Found these on Laing Website, the last graph is confusing as it is rated in amps..and it looks like it exceeds 18W limit in DDC 3.2 & 3.25 (1.5A):

DDC 1 & 2
DDC 3.1 & 3.2
DDC 3.1 - 3.25

Using Data from these tables I plugged them into my own spreadsheet, rounding plot points to nearest .5 ft of head pressure. So it is not Exact, but it gives you a rough idea of the rankings...based on Laing's in-house testing results.



High Flow (> 1.5GPM) = DDC3.2 > DDC3.25 > DDC2
Average flow (1-1.5GPM)= DDC3.25 > DDC3.2 = DDC2
High Restriction (< 1.0GPM) = DDC3.25 > DDC2> DDC3.2

Looks like DDC2 was ahead of its time, DDC 3.2 is a mixed bag, DDC 3.25 overall best.

DDC1, DDC3.1, DDC3.15 all sux lol

But at 2,3GPM the DDC3.25 is catching up again. They are almost the same then. And will probably line up with each other again. But at low flow the ddc3.25 packs more punch.

How much is the lowest recommended flow you must have? I have heard something that all over 1.5 or so is useless. But that might me my memory that is betraying me. So if you are planing to control your pump you should be better of with a ddc3.25 if i understood the graph correctly.

[kinghong1970]

north of 1 but more around 1.5gpm should be fine.

[Brodholm]

How do people fasten their 3.x5? They have no feet's so to speak.

[kinghong1970]

ya mean the pump?



mounted on a DIY plate...

[Brodholm]

ya mean the pump?

Yep, but not the ddc3.2 and 3.1 the 3.x5's. Ie ddc3.25 and ddc3.15.


No mount :\

Is that heat-sinks i see there?

[kinghong1970]

oh... damn... no mounts...

yea, i had them laying around so i just stuck em on the side of the pumps...

[Waterlogged]

Yep, but not the ddc3.2 and 3.1 the 3.x5's. Ie ddc3.25 and ddc3.15.


No mount :\

Is that heat-sinks i see there?

There are 2 small holes in the bottom that you can tap for use with 4mm screws with a max length of 10mm.

Personally, I don't use screws, that's the leading cause of unwanted noise. I either use the included pad, or substitute something soft like the sound absorbing wadding. I'm about to try something new on one of mine.

[faster3200]

This and this graph show conflicting information. Based on the Laing data sheet I would say the second graph is at 13.25V instead of 12V like the other graph, which may be why it uses amps instead of watts for the rating. If this is the case the DDC-2 is still the best.

[Brodholm]

There are 2 small holes in the bottom that you can tap for use with 4mm screws with a max length of 10mm.

Personally, I don't use screws, that's the leading cause of unwanted noise. I either use the included pad, or substitute something soft like the sound absorbing wadding. I'm about to try something new on one of mine.

Ohh, Pads included you say It looks like silicon pads. And if I have been informed correctly so doesn't the ddc like any pads underneath it. At least petras gel-stuff.

And also, how do you like your new ddc3.25 compared to your 3.2? And if you where to say who is the noisiest who would it be? I'm in the dilemma of buying a ddc3.2 or a ddc3.25. And sound is a important factor

[NaeKuh]

but wasn't the DDC2 the one w/ all the reliability issues?

and did the ddc2 really outperform the ddc3.2?

the ddc-2 is about the best pump made until it was stoped because of horrible failure rates.

But i have the best DDC setup on this entire forum. (looking at single pump apparatus)



The distinguishing feature on a ddc-2 is that orange/red impeller.

My heat sink for them. Yes they do get insanely hot.

[kinghong1970]

showoff!

[NaeKuh]

showoff!

sorry my epenius is blocking your view.. what did you say?

[dsumanik]

This and this graph show conflicting information. Based on the Laing data sheet I would say the second graph is at 13.25V instead of 12V like the other graph, which may be why it uses amps instead of watts for the rating. If this is the case the DDC-2 is still the best.

This is what I thought as well... so where do I read the data points from for 12V settings on the that last graph... I will update my chart.

[kinghong1970]

sorry my epenius is plugging my ear.. what did you say?

corrected...



btw, custom job on the heatsink on the DDC?
are you using any thermal paste betwen or just dry fit?

[NaeKuh]

corrected...



btw, custom job on the heatsink on the DDC?
are you using any thermal paste betwen or just dry fit?

there custom.

Bei made about 10 total i think. I bought 5 and i think darth bought another 5.

Those sinks were me being bored with bei and coming up with ideas.

There attached via thermaltape.

And they do get warm, so heat does transfer somewhat though the plastic.

[dsumanik]

So how Do i interpret

This Graph

So that I am only getting the 18W readings, I cant figure it out..do I just throw out any values above the 1.5 Amps line? If someone can list the values for the 18W flowrates/head pressure for the pumps on that graph I will plug them into my spreadsheet and then we will have the accurate picture...

[Waterlogged]

Ohh, Pads included you say It looks like silicon pads. And if I have been informed correctly so doesn't the ddc like any pads underneath it. At least petras gel-stuff.

Those particular pads don't come with the pump. I bought those from a local Home Depot. The pad th DDC's come with are a good bit stiffer and have adhesive on both sides but they do work well.

And also, how do you like your new ddc3.25 compared to your 3.2? And if you where to say who is the noisiest who would it be? I'm in the dilemma of buying a ddc3.2 or a ddc3.25. And sound is a important factor

I wish I had a 3.25 myself but I'm like kinghong, I gots me a cheapass bone that would break if I bought one of the Koolance pumps. I've been badgering Gabe on the boards here at every opportunity to start carrying the newer models and ship them to Newegg so I can get the 3.15 and mod it...which reminds me,

Gabe, start getting these newer DDC's into distro channels please!

Personally, I think your stressing out far too much about some of the "subjective" details. The only way to get past them is to take a leap of faith and pick one, if it doesn't work out the way you'd like, either return it or find a way to make it work the way you'd like it to....it's called modding for a reason.

[Sparda]

I can vouch that the ddc2 will stop spinning when some of the component on the pcb is getting very hot beyond certain temp. It happens to me and when I touch the tube around cpu block and the pump's bottom ; it is very hot. I tried start the pump using seperate psu but the impeller wont move even after I tap the pump. I leave and let it cool for a while and try again. It just start spinning again like nothing happens. I can just give the pump 10 awards for it's reliability.
I think it is normal for most electrical component for the thermal shutdown.

[NaeKuh]

well the thing is a while back, we traced why ddc2 were failing. the conclusions were either gell pad, heat, wet pcb, rapid on off cycling.

the first 2 relates with heat. the last user error.

taking heat out of the eq, so far these pumps havent failed me yet

[Brodholm]

Personally, I think your stressing out far too much about some of the "subjective" details. The only way to get past them is to take a leap of faith and pick one, if it doesn't work out the way you'd like, either return it or find a way to make it work the way you'd like it to....it's called modding for a reason.

Yeah, I know. I think to much and analyze it back an fourth and when I FINALLY makes up my mind something else comes along and ruins everything And then I'm back to square one. I guess its because I'm a bit of a perfectionist and like to have the "best" as possible for a reasonable amount of money.

back on topic: Looking at these graphs makes me think that the extra volts and amperes are the reason for the boost. The DDC3.2 (7-12v) and the DDC3.25 (8-13v). And when they made these graphs the definitely ran the .25 with 13volts. And therefore the "better" performance. And in a normal system you would not be able to get more than 12v.

I would like to see a test where they both are compared at the same voltage.

[Brodholm]

My heat sink for them. Yes they do get insanely hot.

Are that heatskin working well? I'm thinking of milling a similar design as yours. Do you need to have that hole in the middle? That little "pin" isn't moving as I can remember? Or does it have another fuction.