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Unwanted Heater from WC Setup

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eduncan911

Member
Joined
Oct 27, 2004
Location
Upstate NY and NYC
My question is around the heat output of my monster... Currently, my office rises to a toastie 98F from a starting ambient of 68F after about two hours of gaming. Yes, seriously, it's an oven in here.

So, a friend of mine and myself came up with an explaination. I know my deltaT is way outta wack, around 21C (see below). I know this because I have ambient dedicated sensors telling me room temp after 2 hours of "heating up" (from the floor, it's 29C, and it's 35C when standing up) and I have water temp sensors on the output of the radiator (~50C to 52C at times). That equates to 21C, way too high, I know. Office temps start at 20 to 21C when I start gaming, and increase to 35C in an hour or so - hot.

Our theory is since the water temp is 125F (52C), and I am running fans over the radiator, this basically is creating a serious heater in my office - exhausting the heated water.


What if I lowered the deltaT down to say 10C? Now, the heater output of the system is far lower, with a room of ambient around 21C. So that's water temp around 31C, or 87F, opposed to the 125F as before. That could be managable.

To achieve a lower deltaT, say I double my radiators. Yes, lower deltaT, and lower "heat" output of the radiators.

So the $64,000 question: We can't determine if the extra radiators that are now removing additional heat, output the same amount of overall heat expelled as as the 124F temp setup.

Basically, does lowering the deltaT lower the overall room temps?



(more information, if need be)

So, I designed my system with a gasping 17C deltaT on paper. I was dead on, but I didn't calculate the 33% overclock of the GPUs to 955mhz. This basically equates to a 21C deltaT now after a few hours of folding or gaming.

It sucks, I know, and I am in the process of adding more rads and breaking out the CPU into a dedicated Dell H2C w/Peltiers (different story for another time).

I'm hoping by lowering the deltaT that the heat output is far lower overall.
 
Sorry to say, your watercooling makes absolutly no difference in the heat of your room.

Your PC takes energy in the form of electricity, uses it to do the work, and is dissipated as heat.

I see you have a Monster PC. I'm sure your kicking easy 900+ watts in heat. If you were to drop your PC down to 450 watts (meaning two less GPUs) your room will stay cooler and heat up slower.

If you go peltier, it uses huge amounts of watts to cool the cool side, dissipating the heat on the hot side. Meaning your using more elctricity and that's even more heat in your room....
 
1250 Watts used at peak during gaming, so the tail-tail UPS tells me (including tri-monitors).

Yeah, that's what I was thinking. One radiator removing heat from 125F temps, or 10 radiators removing heat from 75F temps. The same amount of heat is removed...

Can't lower the GPUs. With tri-monitors at 5760x1080 gaming, even two chokes under BF3.
 
You need to install a fan or two into the top of your door and share the heat you're paying for with the rest of the building, or move your radiators outside of your office space.
An A/C unit would just increase your electric bill further, though it would take care of the local heat.
 
Sounds like there's no air circulation, meaning the air in your room isn't getting to your A/C's intake. Are you closed up in your gaming room?

My brother's room heats up a lot from his plasma TV + PC while his doors are closed, but once you open the doors, the hot air circulates out of the room towards the A/C intake and his room cools down.
 
Your main problem is that your computer puts out the equivalent of a portable electric heater in your office. I have the same problem in my computer room when running multiple computers. I had to put in a window AC unit to control heat in there. I've found my 12,000 btu AC can handle around 5-6 computers running DC projects at the same time and still keep the temps decently comfortable to kind of chilly.
 
If your room heats up when your rig is loaded, it means your cooling is working properly :p
 
Sounds like there's no air circulation, meaning the air in your room isn't getting to your A/C's intake. Are you closed up in your gaming room?

My brother's room heats up a lot from his plasma TV + PC while his doors are closed, but once you open the doors, the hot air circulates out of the room towards the A/C intake and his room cools down.
This. Open a door/window, something. But that room is clearly not exchanging any air. I have a 1900W heater in my basement and it only heats up a (large)corner of the room after hours on b/c of the normal airflow in that room.
 
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