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couple of watercooling questions

post #1 of 25
Thread Starter 
Hey guys, me again with another few questions:

1) Will a FrozenQ Dual Bay reservoir Red Helix with a built in MCP35X outperform an XSPC X2O 750 dual bay reservoir?
2) Will the above be quieter too or won't I notice any difference?
3) Take a look at this screenshot:

268

Because my manual explained that the PCI-E lanes I marked with number 1 and 2 are the only ones being x16, so I was planning to put my two (I only have one atm, will buy the second in a little while) ASUS Radeon HD7970s reference design there, and have them both watercooled.

Now, the question is: is there any CFX watercooling bridge in existance that would nicely connect the two GPUs at that distance?
 
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post #2 of 25
1) A reservoir is a reservoir. They will perform the same unless you happen to get a vortex issue but that can easily be fixed. The Helix is all looks really. There really isn't much in the form of "performance" to be gained from different reservoirs
2) Personally I wouldn't get either of them. Check this pump combo. It's more expensive but that pump is much better then the one you were looking at.
3) Yes
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post #3 of 25
Thread Starter 
1) OK thanks, I know a reservoir is a reservoir, but I was wondering about the pump that's inside it, obviously. wink.gif
2) I've checked both FrozenCPU and XSPC's website and didn't find anything performance-related to this XSPC D5 pump+res combo. Just the general stats, size, color etc. So how do you know it's better than a res with a swiftech MCP35X pump installed inside it? Oh and btw, it's about a hundred bucks less expensive... Where did you do your research?
3) Sometimes I wonder how people get their Rep...No offense... Which ones?
 
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post #4 of 25
1. In terms of flow rate, yes. The MCP35x is a much more powerful pump than the X2O 750. With your multiple block loop (CPU, 2 * GPU + rads) it might make a bit of a difference to temperatures.

2. Not sure, seems to depend on the individual pump. Some people say the X2O 750 is quiet, some say loud. Either way the 35X is a PWM pump, meaning that you can control it's speed with a PWM fan header to make it quieter when the computer is not under load.

3. I don't know of any solid bridges that will do a 5 4 slot spacing, but then I don't know a lot of solid bridges. You can get things like the Bitspower Crystal links which will fit, Koolance also do an expanding link set.


Edit: 4 slot spacing, not 5. Links added.
Edited by GingerJohn - 6/18/12 at 11:19am
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post #5 of 25
Thread Starter 
Hmm, and if I were to go with this, and place my second GPU where it needs to be in order for the bridge to fit, would I see any loss in performance (as the second GPU's at 8x, if I remember correctly)?
 
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post #6 of 25
You will not notice any performance loss running x16 x8 as opposed to x16 x16...
Basically,the D5 owns DDC's...less heat,less noise,more flow.
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post #7 of 25
Quote:
Originally Posted by B NEGATIVE View Post

Basically,the D5 owns DDC's...less heat,less noise,more flow.

Not entirely true.

The D5 is often quieter and cooler running than the DDC, however it does use more power (24W to the DDCs 18W) which could technically lead to a higher increase in coolant temperatures. However the heat dump from pumps is pretty negligable (<0.2°C) so not worth worrying about.

As for the higher flow, the D5 has a higher maximum flow rate but a lower head pressure than the DDC with custom top (or the stock MCP35x). This means that in a very low restriction loop a D5 will result in higher flow rates, however in a higher restriction loop the DDC comes out on top.

Here is a quick comparison of the D5 (blue) and DDC (red):

pmp-450-pqvspmp400.png?w=614&h=555
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post #8 of 25
Thread Starter 
I'm sorry, I'm familiar with most of the basics of WCing, but can you give me an example of those restrictions you're talking about?
Very handy info, all of it, thanks. smile.gif
 
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post #9 of 25
Quote:
Originally Posted by UltraVolta425 View Post

I'm sorry, I'm familiar with most of the basics of WCing, but can you give me an example of those restrictions you're talking about?
Very handy info, all of it, thanks. smile.gif

The more blocks and radiators you have then the harder it is for a pump to push water through the loop. The easiest way to define head pressure is turning a pump on its side so that it shoots up in the air. From there you measure the height the water shoots up. Having a pump with high head pressure means it can better push water through loops high in restriction.

In regards to pumps there have been two main types of pumps that are the most popular and they are the DDC (MCP350, MCP355, MCP35X, etc.) and the D5 pumps such as the PMP-450 previously shown. They both work well but each has their own advantages. The DDC pumps have higher head pressure and work better then the D5 pumps in loops with more restriction and are also usually cheaper. The issue they is that they tend to run hotter then the D5 pumps and put added heat into the loop. If you go with the DDC pump you should always get an aftermarket top. I don't know off the top of my head how but they do boost the performance of the pump. You can also look into getting tops that have reservoirs attached to them.
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post #10 of 25
Quote:
Originally Posted by UltraVolta425 View Post

1) OK thanks, I know a reservoir is a reservoir, but I was wondering about the pump that's inside it, obviously. wink.gif
2) I've checked both FrozenCPU and XSPC's website and didn't find anything performance-related to this XSPC D5 pump+res combo. Just the general stats, size, color etc. So how do you know it's better than a res with a swiftech MCP35X pump installed inside it? Oh and btw, it's about a hundred bucks less expensive... Where did you do your research?
3) Sometimes I wonder how people get their Rep...No offense... Which ones?

The XSPC reservoirs have a nozzle that directs the inlet directly into the pump, which creates a practically unbroken loop. This improves performance by not having flow impeded by stagnant water in the reservoir.

Here's a picture of what I'm talking about, this is with the standalone reservoir:

img20120419174152.th.jpg

Higher price =/= higher performance. In the case of the FrozenQ reservoir, the higher price is purely for the aesthetics. The Aquacomputer Kyros pure silver CPU block costs at least $100 more than the regular block, yet performs mostly the same. Once again, all about aesthetics.
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