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Old February 20, 2009, 08:08 AM
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Default New loop configuration - unexpected temps...!

Hey guys,

I spent some time changing my loop, just to try new things and try out my GTX 260, running it on air cooling to start.

My initial loop was :
MCR220 > B.I. GTS120 > Fuzion v2 > EK NB5 > MCW60R > MC Res > MCP355
- Filled with distilled h2o and 2 drops of PT Nuke.

New loop is:
MCR220 > MCR120 > XSPC Delta v3 > EK NB5 > MCP355 w/ XSPC Res top
- Filled the loop with black Feser premixed (had some bottles lying around, figured I'd try it out).

I installed the Delta with the fuzion v2 backplate and mounting screws, to fix the motherboard bending issues.

Now to my surprise, idle temps on the processor & northbridge stayed the same (CPU:25C & NB:30C) for roughly the same ambiant.

Under load, the northbrige still goes to 31C, as per the previous setup. The CPU however saw only a 2-3C drop from the previous setup.

I figured removing the gpu (an HD3870) from the loop would give me lower temps, but it's not really the case.

Was I expecting too much? Am I limited by my rads? Is the thicker, heavier Feser premixed solution that much worse than h2o?

Any input is welcomed !!!
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Old February 20, 2009, 10:39 AM
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Quote:
Originally Posted by Synth View Post
Hey guys,

I spent some time changing my loop, just to try new things and try out my GTX 260, running it on air cooling to start.

My initial loop was :
MCR220 > B.I. GTS120 > Fuzion v2 > EK NB5 > MCW60R > MC Res > MCP355
- Filled with distilled h2o and 2 drops of PT Nuke.

New loop is:
MCR220 > MCR120 > XSPC Delta v3 > EK NB5 > MCP355 w/ XSPC Res top
- Filled the loop with black Feser premixed (had some bottles lying around, figured I'd try it out).

I installed the Delta with the fuzion v2 backplate and mounting screws, to fix the motherboard bending issues.

Now to my surprise, idle temps on the processor & northbridge stayed the same (CPU:25C & NB:30C) for roughly the same ambiant.

Under load, the northbrige still goes to 31C, as per the previous setup. The CPU however saw only a 2-3C drop from the previous setup.

I figured removing the gpu (an HD3870) from the loop would give me lower temps, but it's not really the case.

Was I expecting too much? Am I limited by my rads? Is the thicker, heavier Feser premixed solution that much worse than h2o?

Any input is welcomed !!!
The reasoning is simple. First of all premixed solutions are horrible, they aren't any more non-conductive than regular distilled water is, and the aditives normally ruin the natrual thermal capacity. Aslong as your not mixing metals(all copper loop, no aluminum) always go pure distilled, perhaps with a drop or 2 of biocide.

Watch this, Petra does an experiment that proves/shows that pre mixed fluids are a scam. YouTube - PT QuickClips - Fun With Coolant

Second of all, you have suffiecent surface area in your loop (2x120 rad + 1x120 rad) for what your trying to cool, that temperatues arn't goinna get much lower no matter what type of rad/how many you throw in your system.

Looking at your system, you have about 400-600 watts of cooling power(220+120 rads) depending on various factors(pumps, fans, flow, etc), and only about 200-400watts(CPU= 70-150watts, NB = 20-50watts, GPU= 70-200watts) of heat being created. This means you have an abudent overhead, more surface area(more bigger, better, badder rads) ain't gonna do much.

Now your use of a pre mixed fluid would throw my numbers off, but it should still result in an overhead. Infact with regular distilled water I'd be willing to say that if you drop the 120 rad, your temperatures wouldn't go up by much, if at all.

Hope that helped.
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Last edited by Chilly; February 20, 2009 at 10:49 AM.
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Old February 20, 2009, 11:58 AM
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Thanks for your insight, but you missed a point:

- I am no longer cooling a gpu, like I use to in my initial loop.

That's 50-200watts of heat the liquid cooling system does not need to dissipate anymore.

I guess I'll attribute the crappy performance to Feser Premixed... can't see what else...
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Old February 20, 2009, 12:44 PM
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Hard to know what's going on with the chipset temps. But removing 100-ish watts from the system may not have as big an impact as you might expect. Honestly, in a triple rad (roughly equivalent to your setup) setup using 1000rpm fans, I wouldn't expect a 100W load to equal more than 2-3 degrees C either way. With faster fans, even less effect. At idle (the 3800-series were pretty good at idle, iirc), barely anything at all. You've got a strong pump, so your flowrates are well into the area where increasing/decreasing them (removed the GPU block, but thicker fluid) makes very little difference either way. And finally, waterblocks are bastards, and it's easy to get a couple degrees variation between GOOD mounts.
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Old February 20, 2009, 07:03 PM
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looks if fusion wasn't up to par where XSPC Delta v3 transferd more due to 2-3 cpu temp drop = gpu load

any reason why droping the gpu out of loop?
i would try this config
MCW60R > MCR220 > MCP355 w/ XSPC Res top > XSPC Delta v3 > MCR120 > EK NB5 >

IMHO colourd dies arn't a good idea using in loop for over time they will gel
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Old February 20, 2009, 07:11 PM
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Quote:
New loop is:
MCR220 > MCR120 > XSPC Delta v3 > EK NB5 > MCP355 w/ XSPC Res top
Uh why are you running 1 radiator after another? That isn't doing you any good.

Just run the MCR220 and put the 120 later in the loop if you wish.
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Old February 20, 2009, 07:49 PM
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Quote:
Originally Posted by Synth View Post
Thanks for your insight, but you missed a point:

- I am no longer cooling a gpu, like I use to in my initial loop.

That's 50-200watts of heat the liquid cooling system does not need to dissipate anymore.

I guess I'll attribute the crappy performance to Feser Premixed... can't see what else...
Then I suggest you re-read the second part of my post, as I did not miss the point, infact I explained EXACTLY why. Frankly its irrelvent if your cooling your GPU or not since my point is you've got MORE heat being removed than put in. Removing that(GPU) heat source will/did do little to nothing in this case. On the other hand IF you were producing more heat than was being removed, or were close to the limit(you were/are not) then you would of noticed a diffrence.

Also enaberif is correct, KISS, if thats the simplest loop possible, then more power to you, but I hope your not going out of your way to have it rad -> rad, if you are your doing more harm than good. Hope that helped
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Old February 20, 2009, 08:47 PM
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IMO you changed too much to be able to compare.

You changed a radiator, you removed a block, you changed your CPU block and you used Feser Fluid. You even increased the flowrate quite a bit too from removing a block and using a top on the MCP355.

But as others have said, you have more radiator than you actually need so that's why your temperatures aren't changing as much as you had hoped.
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