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Swiftech MCP655 pump help - Page 2

post #11 of 22
Quote:
Originally Posted by Lu(ky View Post
Wow that little Laing DDC 3.2 is stronger then my 655 I was thinking of buying it with the new top. I will be using 1/2 tubing with a D-tek. I cleaned out my D-tek couple days ago of all the slag. I am putting on the D-tek on my eVGA board as we speak.
With a petra top it is a little stronger in most cases than an MCP655. The older version or DDC2 was much much stronger, but they've cut down performance for additional reliability. It's still going to be very slightly stronger than and MCP655, but not as signifantly as the older variety.

Here are the curves, the dark blue line versus the red line and most system curves intersect between about 1 gpm and 3 gpm which is exactly where the DDC with top is better. Even my modded D5 doesn't pull ahead of the DDC until about 2 GPM which is only possible with pretty much single free flowing block type setups.
    
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post #12 of 22
This is a link to a shoot-out with the DDC and all the different tops.. might interest some off you:

http://www.****************/reviews....ops_shootout/1

EDIT: well thats gay it wont let me link...

http://www.overclock2d.net/reviews.p...ops_shootout/1

change it to 3d instead of 2d
    
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post #13 of 22
Quote:
Originally Posted by marcus000 View Post
This is a link to a shoot-out with the DDC and all the different tops.. might interest some off you:

http://www.****************/reviews....ops_shootout/1

EDIT: well thats gay it wont let me link...

http://www.overclock2d.net/reviews.p...ops_shootout/1

change it to 3d instead of 2d
Thanks for the link, I've seen that once before, unfortunately I really wish they had plotted an entire curve because only doing the max head test and max flow rate test doesn't tell the whole story which is indicated by their "Real Loop Test". So the Petra top, must be providing a more rounded curve than the alpha cool which nets more real world performance, yet they base their conclusion on the end points which don't matter??. The same would be true in comparing the stock D5 vs a DDC3.2 with top. The D5 clearly has more max head and better max flow rate, but because the curve is fairly linear on the D5 and the DDC is rounded, the net result is that the DDC actually performs better in real world applications.

Comparing two pumps like this may give you some idea, but it's alot like comparing two car specs. One is parked comparison and the second is top speed..... forgetting that what matters is the in-between.

A good pump comparison would at least develop PQ data at several points from 1 GPM to 3 GPM, because that's the only area that any real computer loop will be intersecting.

My vote still goes to the Petra top, mainly because I have acrylic phobia and derlin is much more proven to be safe.
    
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post #14 of 22
I really like the 18W DDC...I have the old #2 version with orange impeller and high head...The reason I don't ever suggest them to people is because of the high death rate they have...The newer version #3.2 is supposed to be more reliable but they haven't been out long enough for me to say they are and they are just barely more powerful the the D-5...I've had 4 of them and never had a problem but a lot of people have....
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post #15 of 22
Thread Starter 
I am using the Swiftech D5 now on my new D-tek fusion. I was only using the Storm for the CPU block my last setup. I can say the water is running very very fast compared to my old setup. That Storm was really really restrictive I guess.
    
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post #16 of 22
Yeah the Fuzion is supposed to be really free-flowing...The Storm was one of the most restrictive blocks it was a jet impingement type block...It was really good on naked single core chips with a high head pump....
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post #17 of 22
Thread Starter 
Well I was thinking of buying one of these Laing DDC-3.2 18w pump with a Alphacool Modified Laing DDC Plexiglass Reservoir Attachment on it? With this res on it will it still perform well? With 1/2 tygon tubing as well
    
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post #18 of 22
That one in the picture is just the regular top...The one with a built in res is a lot taller...I wont swear to it but it seems like a while back a guy that had one with the built in res couldn't hardly get it to bleed right...I think I would just use the regular top like pictured with a T-Line or normal res...But yeah the Alphacool tops perform about on par with the Petra top....
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post #19 of 22
TBH there isnt much of a difference between the 3 custom tops available, they're all about the same perforamance wise...

Somethin else you guys may not know is that there is a new OC Labs top about to be released which has improvements over the old one:
http://www.watercoolinguk.co.uk/foru...pic.php?t=1152
    
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post #20 of 22
The new OC Labs tops are now available:

http://www.watercoolinguk.co.uk/cata...hp?cPath=77_75

    
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