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Old 02-16-07, 07:41 AM Thread Starter   #1
IYIENACE
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DDC-2 quit last night


Here's my Core Temp log.


CPUID: 0x6F6
Processor: Intel Core 2 Duo E6600 (Conroe)
Revision: B2
CPU Speed CPU#0 (Core#0) CPU#0 (Core#1)
3153.97 31 32
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My PC still runs with no apparent damage.... am I just really lucky or how much heat can these C2D take?

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Old 02-16-07, 07:42 AM   #2
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OMG that sucker got hot!

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Old 02-16-07, 07:48 AM   #3
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125C!! With throttling and thermal protection I'm surprised it didn't shut the computer off...

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Old 02-16-07, 07:58 AM Thread Starter   #4
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Quote:
Originally Posted by Ducatti
125C!! With throttling and thermal protection I'm surprised it didn't shut the computer off...
Oh it did! lol. I was watching a movie and pop off it went. Throttling is disabled in BIOS though.

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Old 02-16-07, 08:37 AM   #5
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I am curious to know how old your pump is and whether or not you are using the stock top or an aftermarket top.
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Old 02-16-07, 08:44 AM   #6
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Check his sig, it's Petra's Top.

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Old 02-16-07, 08:47 AM   #7
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Quote:
Originally Posted by Maviryk
Check his sig, it's Petra's Top.
I didn't even pay attention to his sig as that shade of blue is hard to read on my laptop screen that I am using at the moment.

I would still like to know how old it is though.
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Old 02-16-07, 09:16 AM Thread Starter   #8
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voigts I really can't remember when I bought it but I'm guessing about 7-8 months ago. It's still working, I am using it at the moment but I already ordered another because I am so paranoid about it quitting that I have to glance at the res constantly t o make sure the water is flowing.
My loop is fairly new and the water is very clear with 0 air. I am using Petrosin -sp w/ distilled water.

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Old 02-16-07, 09:37 AM   #9
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Quote:
Originally Posted by IYIENACE
I am so paranoid about it quitting that I have to glance at the res constantly t o make sure the water is flowing.
You might consider doing what I am doing as a backup. I have MBM w/ coretemp plugin ( http://www.thetechrepository.com/showthread.php?t=74 ) monitoring the temps on each core. Then I have alarms set such that if the temp on any core exceeds 65c, then it executes a little freeware app that shuts down the PC instantly ( http://www.xp-smoker.com/freeware.html ).

This gives me a lot more peace of mind.
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Old 02-16-07, 09:48 AM   #10
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Hmmm...another dead modded pump.

On the Cooling-Masters website I read about the DDC pumps and failures. Laing says that they never have failures of the DDC pumps used by Apple.

Interesting...
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Old 02-16-07, 10:35 AM   #11
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Yeah, I'd be forgetting about using the mod-top right about now too....especially after taking an $80 hit without warranty.
Makes me wonder how close they're machining the insides to match the Liang original.
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Old 02-16-07, 10:46 AM   #12
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Are we sure these are real DDCs? And not the fake ones...?

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Old 02-16-07, 10:55 AM   #13
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Quote:
Originally Posted by Diggrr
Yeah, I'd be forgetting about using the mod-top right about now too....especially after taking an $80 hit without warranty.
Makes me wonder how close they're machining the insides to match the Liang original.
I've already asked that. Petra says that it's just a circle. The shape of the Laing volute is complex enough to be a pain to duplicate...not to mention possible patent problems.

The shape of the volute is important to the generation of head, and all these aftermarket tops have less head than the stock top. But volute shape is also important to maintaining equal lateral forces on the impeller. I remember the old days where idiots would kink a tube and cut flow to see what would happen, and they would crack the ceramic shafts of their pumps. That's because at zero flow the lateral force on the impeller is huge. There have been issues with impellers touching the sides of housings, and I think that might be part of the cause.

The more I hear, the more I think, "stay away from aftermarket tops."
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Old 02-16-07, 11:06 AM   #14
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... IIRC the aftermarket tops enables the pump to produce MORE head than the stock one does... why would you want less head in a highly restrictive water loop...
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Old 02-16-07, 11:45 AM   #15
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Quote:
Originally Posted by Maviryk
... IIRC the aftermarket tops enables the pump to produce MORE head than the stock one does... why would you want less head in a highly restrictive water loop...
AFAIK most of the 1/2" tops for the DDC decrease pressure (head) but increase flow.

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Old 02-16-07, 12:11 PM   #16
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Quote:
Originally Posted by Maviryk
... IIRC the aftermarket tops enables the pump to produce MORE head than the stock one does... why would you want less head in a highly restrictive water loop...
As Immortal said, the tops decrease head but increase free flow. On very restrictive loops a stock DDC will have equal and possibly even more flow than the aftermarket top because of the greater head.

Regardless, the answer to you question is so that my pump doesn't die.
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Old 02-16-07, 05:58 PM   #17
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Quote:
Originally Posted by Graystar
I've already asked that. Petra says that it's just a circle. The shape of the Laing volute is complex enough to be a pain to duplicate...not to mention possible patent problems.

The shape of the volute is important to the generation of head, and all these aftermarket tops have less head than the stock top. But volute shape is also important to maintaining equal lateral forces on the impeller. I remember the old days where idiots would kink a tube and cut flow to see what would happen, and they would crack the ceramic shafts of their pumps. That's because at zero flow the lateral force on the impeller is huge. There have been issues with impellers touching the sides of housings, and I think that might be part of the cause.

The more I hear, the more I think, "stay away from aftermarket tops."
If Petras top made the chamber round, then he did not duplicate the chamber area of the stock top. When I made mine, I measured and found that the chamber area has a slight spiral to it. So when I made mine last May, I used a rotary tool after drilling a circle to slightly ream out the chamber area into a slight spiral to match the original top. I also paid great attention to getting my top to have the same clearance between the impeller and the top of the chamber. I found that this distance is vital to keeping the impeller level in the chamber. If there is too large of a gap above the impeller, the impeller can spin at an angle and hit the sides.

It might be that Petra has a design flaw with his top. I made mine last May and so far so good (http://www.ocforums.com/showthread.php?t=456511&page=2). I am currently using the revision 4 that I made.
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Old 02-16-07, 08:29 PM   #18
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I just have no idea why the threaded version of the DDC isn't sold here. That would take are of the 1/2" barb issue and we can forget about these tops.
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Old 02-16-07, 08:47 PM   #19
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Quote:
Originally Posted by Graystar
I just have no idea why the threaded version of the DDC isn't sold here. That would take are of the 1/2" barb issue and we can forget about these tops.
I didn't even know there was a threaded version. That would solve a lot of problems.

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Old 02-16-07, 09:23 PM   #20
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There is no threaded version, at least from Laing. The only threaded DC Pumps they have are the D4 and D5.

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