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post #11 of 32
Quote:
Originally Posted by tsm106 View Post

In general terms, there's only 2psi difference between a RP452x2 w/ two PMP450 P5 and one 35x. Now add up the difference in cost of running dual D5's in that config... ouch.

The difference between a 35x2 and two D5s is about that and from what I've heard a D5 at full speed is much more tolerable. A 35x2 isn't exactly cheap either especially after you factor in a heatsink and res like that combo.
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post #12 of 32
Quote:
Originally Posted by BababooeyHTJ View Post

The difference between a 35x2 and two D5s is about that and from what I've heard a D5 at full speed is much more tolerable. A 35x2 isn't exactly cheap either especially after you factor in a heatsink and res like that combo.


Why would you run a 35x at full speed? What's the beef? You should know that right? You don't need a heatsink. Is it because some dude keeps going around yelling buy a heatsink when ever someone mentions 35x lol. If you have a well ventilated setup, ie not a bay res, which you shouldn't be sticking a 35x into anyways, it will get plenty of air. And on that subject, I'd rather have the heat dumped into the case than into my loop.
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post #13 of 32
Quote:
Originally Posted by tsm106 View Post

Two D5s = 1 35x. So if you want double that flow you'd want another 35x, ala 35x2. Well, that is unless there's something specifically wrong with your dual d5, so if there's not and it's just too weak, the first point remains.
50w heat dump into the loop, yikes!

I'd say it's more. I own an RD-20 and it gets hot. 24vdc at 2.5amps is 60watts, while the rd-30 is pushing 24v @ 3.2a for 77watts. They do get hot, but; they dissipate a lot of heat with the body of the pump which is Alu so some air circulation in the case is needed. I will tell you this, they would do a heck of a job for that fountain effect the OP is looking for.
Quote:
Originally Posted by tsm106 View Post

Why would you run a 35x at full speed? What's the beef? You should know that right? You don't need a heatsink. Is it because some dude keeps going around yelling buy a heat sink when ever someone mentions 35x lol. If you have a well ventilated setup, ie not a bay res, which you shouldn't be sticking a 35x into anyways, it will get plenty of air. And on that subject, I'd rather have the heat dumped into the case than into my loop.

I have a 402x with a 35x and no heat sink working for over a year now without a problem. Those a re nice pumps, and I have no noise from mine even when folding.
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post #14 of 32
That's a lot of juice Rognin!
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post #15 of 32
Quote:
Originally Posted by tsm106 View Post

That's a lot of juice Rognin!

I'm sure I was logged in to OCN... rolleyes.gif
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post #16 of 32
Quote:
Originally Posted by tsm106 View Post

Why would you run a 35x at full speed?

Which was sort of my point as well. I hear that a D5 is very tolerable at full speed.
Quote:
What's the beef? You should know that right? You don't need a heatsink. Is it because some dude keeps going around yelling buy a heatsink when ever someone mentions 35x lol. If you have a well ventilated setup, ie not a bay res, which you shouldn't be sticking a 35x into anyways, it will get plenty of air.

You use a heatsink too. Don't act like ddcs don't run warm. If you can fit a heatsink its not a bad idea. Plus the feet on the swiftech heatsinks do a pretty decent job of decoupling.
Quote:
And on that subject, I'd rather have the heat dumped into the case than into my loop.

Why? Thats what the radiators are there for. Its not like its a large heat load. According to Martin even the ddc dumps most of its heat into the loop.

I do have to say that the 35x2 is surprisingly powerful. It just blew apart a d-plug that I never had any issues with when I was using my 355.
Edited by BababooeyHTJ - 10/6/12 at 5:09pm
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post #17 of 32
Quote:
Originally Posted by BababooeyHTJ View Post

Which was sort of my point as well. I hear that a D5 is very tolerable at full speed.
You use a heatsink too. Don't act like ddcs don't run warm. If you can fit a heatsink its not a bad idea. Plus the feet on the swiftech heatsinks do a pretty decent job of decoupling.
Why? Thats what the radiators are there for. Its not like its a large heat load. According to Martin even the ddc dumps most of its heat into the loop.
I do have to say that the 35x2 is surprisingly powerful. It just blew apart a d-plug that I never had any issues with when I was using my 355.


I use heatsinks cuz my loop is over 2K and heatsinks are not on the radar as a cost concern. rolleyes.gif

If you're concerned over 12 bucks on the cost of a swiftech sink, what's your thoughts on 35-40 for the koolance? Anyhow cost wise, the point is you can get most of the performance of dual d5s with one 35x.

The pumps do get warm, but as I said it's not detrimental. I'm actually using 3 pumps and one of the three isn't using a sink, fyi.
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post #18 of 32
I am the one who won't recommend the MCP35X without the heatsink simply because I don't want to recommend that anyone run something that is not completely protected, and I would not want to have people suffering pump failure when it's so easily prevented.
   
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post #19 of 32
Where did I say that a heatsink was absolutely necessary? I'm not sure what the problem is. You're the one who bought up cost in a discussion about dual pumps. rolleyes.gif
Edited by BababooeyHTJ - 10/6/12 at 6:08pm
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post #20 of 32
Quote:
Originally Posted by BababooeyHTJ View Post

Where did I say that a heatsink was absolutely necessary? I'm not sure what the problem is. You're the one who bought up cost in a discussion about dual pumps. rolleyes.gif

Quote:
Originally Posted by BababooeyHTJ View Post

A 35x2 isn't exactly cheap either especially after you factor in a heatsink and res like that combo.
Quote:
Originally Posted by BababooeyHTJ View Post

You use a heatsink too. Don't act like ddcs don't run warm. If you can fit a heatsink its not a bad idea.


What are you trying to imply then?


Btw, you realize I brought up cost in the context of running one versus two pumps, and the difference in that cost should be obvious?
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