View Full Version : 2 18W DDC = RD30 or better?
Just having random ideas here
2 DDC in 18w, they more powerfull or less than a RD30
I forgoten and can't be assed to look.
I need to drive flow through 6 rads, all Thermochill. NOT SERIAL, BUT IT'LL BE DONE THROUGH A MANAFOLD SO ALL OWN LOOPS AND STUFF
This is an idea i had when i was sat in trafic today.
Please tell me the facts i need
kamongear
06-09-2007, 04:30 PM
Im 80% sure they are more powerful.
as far as i remember they are better than a single rd30
rogard
06-09-2007, 05:00 PM
also less heat dump?
Pete,
Look at the pressure of just one 18W DDC.. 10 metres/meters I believe. Look at the head pressure of one RD30... 14 metres/meters I believe. Twin 18W DDCs would be better
If two ddc's are better than a single rd-30.. then why are people so interested in the rd-30? It costs more, and seemingly preforms worse, so why is there so much hype about it?
serialk11r
06-09-2007, 06:50 PM
If two ddc's are better than a single rd-30.. then why are people so interested in the rd-30? It costs more, and seemingly preforms worse, so why is there so much hype about it?
Well, 2 ddcs takes up a good bit a room, DDCs are supposed to be lower quality pumps in general (pretty obvious...), and they're going to be phased out (DDC-2).
YugenM
06-09-2007, 07:15 PM
Well, 2 ddcs takes up a good bit a room, DDCs are supposed to be lower quality pumps in general (pretty obvious...), and they're going to be phased out (DDC-2).
good riddance ;)
hecktic
06-09-2007, 07:27 PM
also less heat dump?
Are you saying the DDC-2 gives less heat dump than the RDs?
serialk11r
06-09-2007, 07:55 PM
SHEESH STOP MAKING ME POST! lol :p:
good riddance ;)
No, the RD30s are incredibly loud...:P with power comes drawbacks.
Are you saying the DDC-2 gives less heat dump than the RDs?
2 DDC2s uses less power than a RD30. If the efficiency of these pumps really is something like 15% and the RD30 isn't much better, sure they dump less heat. But again, only part of the heat makes it to the water and in the end that heat is pretty trivial...unless you have some weakass 120mm single rad lol. If you're concerned give the pump less volts and stop complaining :P
nikhsub1
06-09-2007, 08:15 PM
Head of RD-30 at 24v = 10Meters or 33 feet. Head of 1 DDC 18w with top inlet is roughly 6.5M or 19-20 feet. So take 2 DDC's and you get 13M head. So simple math would tell you 2 dcc perform better, are quiter, cooler, don't need a 24v power source, cooler and easier to manage than the RD-30. Oh, and they offer redundancy too.
ShoNuff
06-09-2007, 10:31 PM
Head of RD-30 at 24v = 10Meters or 33 feet. Head of 1 DDC 18w with top inlet is roughly 6.5M or 19-20 feet. So take 2 DDC's and you get 13M head. So simple math would tell you 2 dcc perform better, are quiter, cooler, don't need a 24v power source, cooler and easier to manage than the RD-30. Oh, and they offer redundancy too.
I was wondering how long it was going to take before you posted. :yepp:
ranker
06-10-2007, 01:58 AM
Head of RD-30 at 24v = 10Meters or 33 feet. Head of 1 DDC 18w with top inlet is roughly 6.5M or 19-20 feet. So take 2 DDC's and you get 13M head. So simple math would tell you 2 dcc perform better, are quiter, cooler, don't need a 24v power source, cooler and easier to manage than the RD-30. Oh, and they offer redundancy too.
I'm caught going and forth between keeping the RD-30 or switching back to 2 DDC-2's for my CPU loop. However, what's more reliable, 1 iwaki or 2 DDC-2's?
Head of RD-30 at 24v = 10Meters or 33 feet. Head of 1 DDC 18w with top inlet is roughly 6.5M or 19-20 feet. So take 2 DDC's and you get 13M head. So simple math would tell you 2 dcc perform better, are quiter, cooler, don't need a 24v power source, cooler and easier to manage than the RD-30. Oh, and they offer redundancy too.
I'll ignor everyones :banana::banana::banana::banana:ty coment! I need it to be confered in writing and all.
Okay the made question is, what would be the max number of DDC i can have in a row all joined up in serise?
MrToad
06-10-2007, 06:06 AM
what would be the max number of DDC i can have in a row all joined up in serise?
It depends on serisean local laws and regulations.
I'd say 42.
NaeKuh
06-10-2007, 09:00 AM
Head of RD-30 at 24v = 10Meters or 33 feet. Head of 1 DDC 18w with top inlet is roughly 6.5M or 19-20 feet. So take 2 DDC's and you get 13M head. So simple math would tell you 2 dcc perform better, are quiter, cooler, don't need a 24v power source, cooler and easier to manage than the RD-30. Oh, and they offer redundancy too.
^ is also what i believe.
But for the purpose of my ego...
*pluging my ears* LALALALALALALLALALALLALALALALALALALALA
You say something scott?? im sorry i was cleaning my ears. :rofl:
I have both. I just think my RD-30 looks more leet and pimp. Temps wise, i feel my RD-30 gives better temps tho. :T
Fairydust
06-10-2007, 09:06 AM
It depends on serisean local laws and regulations.
I'd say 42.
Well Laing specifies 1,5 bar max system pressure, so at 0 flow no more than 3.
Well Laing specifies 1,5 bar max system pressure, so at 0 flow no more than 3.
Okay but what about with flow....
3 be perefect. I just set a loop up with a presure gauge on the 2 pumps.
Can't test till tormrow when i can nick my PSU back
I didit, got a spike of 15psi +, need a higer range gauge but then it droped to 13psi.
It's only working out to be a 10 meter head that
Okay 2 of these new blue implered DDC's with Petra 01s tops and DD high flow barbs all over, 1 Storm REV1, Micro res
I had a presure reading from the outletof the 2nd pump which lead to the storm of . . .
9psi exactly!!!
That about a 250'' of water! Thats 6.5 meters or 20.83 ft of head presure between 2nd pump and Storm inlet!!!
Humm i wander what 3 DDC's will do hehehehe
Defo got some power.
Next test i thingis them feeding of a big res and seeing how high i can really spray them the side of the house for a laugh
sick_g4m3r
06-14-2007, 02:27 PM
holy shot!! was the rad a PA120.3?
holy shot!! was the rad a PA120.3?
Huh?
I don't list a rad at all.
It was Micro res>DDC>PG>DDC>PG>Storm>Res
The PG is the presure gauge and take no flow away or presure!
Gonna stick a rad in i think tomorow.
Will a Thermochill PA120.3 do it for you then?
Can do it as thus
Micro res>DDC>PG>DDC>PG>Storm>RAD>Res
You tell me
sick_g4m3r
06-14-2007, 03:19 PM
oh yeah sure, i was jw if the pressure drop also included the PA120.3 for that 20ft head. those numbers look great
oh yeah sure, i was jw if the pressure drop also included the PA120.3 for that 20ft head. those numbers look great
I gotta do some photos of brading for my mates shop, sonn as thats done will stick the thermochill in after the Storm and see what goes like