CPU-300 with exos-2

[s1301950]

Hi, i've been a great fan of koolance product for more than 5 years (6 1/2 to be exact). Have changed cpu / video cards dozens of time with the same cpu-300 and exos-2 set up i bought long ago. Last night i upgraded from a e4300 to a qx6850 and got some heat problem. I got an asus striker extreme, and my original e4300 was happily running cool with just one cpu-300 in the exos-2 loop. Along with the cpu upgrade, i also introduced VID-282 (for my 8800 gtx), 2 voltage regulators and 2 chipset coolers. The set up can be depicted as followed:

start - CPU -> video card -> split -> CHC-120-V06 -> CHC-120-V06->join->back to exos 2
-> VR -> VR->

I checked the bios temp monitor (no windows, just bios), the chipset temp is stabilized around 30C while the cpu creeps up to low 50's and then the cpu was forced to shutdown on its own.

The water is definitely hot, so the heat is definitely transferred to the water, so that rules out the cpu-300.
The Exos-2 was working before, so i don't see why the rads are not doing its job.
Water is definitely flowing. I understand the flow rate would be slower than before because of additional blocks, but the cpu shouldn't keep going up.....

please, some help from the pros...

 

[filthysanchez]

Too much load for the loop, you need more radiator space.

 

[Hades16x]

Well the good thing about a radiator is that they have almost limitless heat dissipation abilities.

If your temps keep rising, your loop is overloaded and you're not dissipating enough wattage

Remember, the net sum of wattage abs to wattage disap should be 0.

If it equals a positive number, then for every set ammount of time, the total heat energy in the water will add by that number. Eventually youll be cooling a CPU with 100C water.

The solutions to try:
1) Ramp up fan speed. More air to push across rad will increase dissipating compacity.
2) Larger radiator. My radiator is the PA120.3 which is one of the leaders in low airflow dissipation. With this, I can effectively lower fan RPM and still dissipate. If Im having problems, I can ramp up fan speed via a controller.
3) get rid of blocks.

Lastly, and this may be difficult to accomplish, but lowering ambient air temps should help. Especially removing the hot, dissipated heat, and getting it far away from the intake on your radiator. You cant keep a computer cool recycling the same air across it.
When you stress the computer, its natural for ambient air temps to rise, unless you have a computer room with an A/C duct intake and a huge fan removing all air back that has been used.

Sounds Extreme. IMHO, try new faster fans. If noise pisses you off as much as me, get a larger/better/moar radiator.

Here is what you have:
start - CPU -> video card -> split -> CHC-120-V06 -> CHC-120-V06->join->back to exos 2
-> VR -> VR->

Why are you splitting the CHC-120-V06? In ideal circuitry, there would be no resistance gain from the split, but IMHO, youre getting pressure drop from added resistance from the splitters itself.

Could try 1)

CPU> CHC-120-V06>CHC-120-V06>120.1(new rad)> GPU> VR>VR> Exos 2.

OR
Dual loops

L1: 120.1>CHC-120-V06>CHC-120-V06>VR>VR
L2: Exos>CPU>GPU

Best advice I can give you is to find specific wattage for each part.

Say
CHC-120-V06=10w abs
VR = 10w abs
GPU= 200W abs
CPU= 100w abs
pump = 10w abs

You need 350 watts off dissipation power under ideal settings. Id say 400 to be on the safe side.

Then you need to find what your radiator is rated at. Since the exos is a kit, (supplied fans), it should give you a pretty good rough estimate on it's limits. Say its 250w. You need to find a way to add at least 100w of disp power.

My $ .02

 

[s1301950]

Thanks so much for the detailed reply. My set up is pretty much all koolance. The rads is the exos-2, and from http://www.koolance.com/water-cooling/product_info.php?product_id=496, it should be able to dissipate 750W. I'm suspecting that something wrong with the rads because increased fan speed does not lower the temp that much. Maybe it takes some cleaning?

The split is more of a 10->6 tube size down because the VR and the chipset coolers are all 6mm. so i had to split it into 2 6mm loop and then join them back to 10mm before it hits the rads again.

Anyone else have an exos-2 around here and can comment on its dissipation ability in a loop involving qx6850 and 8800gtx?

 

[Hades16x]

Well the only way I can explain it is like this:

You purchased a 700w PSU from zomgsweetcompany. But its only rated at 30C and provides 12 amps on the 12v line :-P.

I have a hard time believing that, your exos dissappates more heat than my Theromchill 120.3. If anyone can chime it on this, Id love to hear from you.

Not knocking the system by no means, but 750 watts out of a 120x2 radiator, unless its a freaking blower, I doubt the ability.

http://thermochill.com/PATesting/index.php#PA1203

That pretty much states one of the best radiators in the game can dissipate ~600 watts of power. the 120.2 would be ~400w then. There is no way your exos 2 is ~2x as good at the job, if so, none of us would be using our equip.

Would still have to say you only have ~300-350w Dis power. You're over that.

 

[Arcygenical]

Said koolance radiator can dissipate up to 750w of heat, given airflow akin to an automobile environment.

In short, it's probably dumping a bit less than 350w depending on the speed of your fans.

You need another radiator.

 

[Hades16x]

Thanks for the info arcygenical.

What I was thinking also.