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# How much BTU's of heat does a computer generate?

I just wanted to get some input, I'm starting a build in a few days. I'm just days away from blowing probably \$1,000 in parts to cool my computer. The reason I need to know the BTU's is because I will be doing a chilled water build, and need to know how many BTU's I have to fight off.

Now here is my understanding, a computer uses power....power that can be measured in Watts. Not all of those watts are converted to heat, but for the sake of safety let's say the computer is acting like a space heater and is 100% efficient converting watts to BTU at 100% efficiency.

Now my PSU is a seasonic 1000W platinum plus. So the max my computer can use is 1000 Watts of power.

now the conversion is 1 BTU/hr = 0.29307107 Watts.

So 1,000 watts = 3,412 BTU/hr of heat by my calculations.

is this correct? or if it creates more heat, please explain to me how you can generate more heat from a set amount of wattage? Am I using the correct formula? If not please provide a correct one.

Thankx guys.
The 1000W is a max rating, the computer will use much less, maybe even 20x less at idle.

And to my understanding, unless you're running a heat pump (and thus cooling somewhere else) the heat you release can't be more than the energy that comes from the outlet.
1000 watts is like 3500 BTW I think, I have an aquarium chiller for my rig and it does fine. It is rated at 4K BTU, and my rig draws like 470 watts under full load.
 Black Lightning (24 items)
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 Black Lightning (24 items)
CPUMotherboardGraphicsGraphics
4770K Gigabyte Z87 OC Force Sapphire 290x  Sapphire 290x
RAMHard DriveHard DriveHard Drive
Crucial Ballistix Tactical LP Toshiba Q Series Pro Samsung 840 Pro WD Black
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Seagate XSPC Raystorm EK-FB GA Z87X-OC Force EK-FC R9-290X - Acetal+Nickel
CoolingCoolingCoolingCooling
EK-FC R9-290X - Acetal+Nickel  XSPC EX420 XSPC D5 Dual Bay Reservoir/Pump Combo External Chiller
OSMonitorKeyboardPower
Windows 10 Dell U2210H x 5 On Custom Mount Logitech Orion Spark G910 Silverstone ST1000-G Evolution
Rosewill Blackhawk-ULTRA Logitech G600 Razer Destructor Sony 5.1 Surround Sound with Powered Subwoofer
Quote:
Originally Posted by ionstorm66

1000 watts is like 3500 BTW I think, I have an aquarium chiller for my rig and it does fine. It is rated at 4K BTU, and my rig draws like 470 watts under full load.

yea, that's what I figured. I doubt my rig even with overclocking will generate more then 2,500 BTU's. I want to use a 5,050 BTU window AC for my loop. Plan on placing it in the attic above the computer room But some people been telling me that's not enough, and I couldn't for the life of me understand how a 5,050 BTU AC couldn't keep up with a computer that could at max pump out 3,500 BTU's....even with efficiency lose due to me building it myself.
The only issue is that a cheap window unit won't last long running max 24/7.
 Black Lightning (24 items)
CPUMotherboardGraphicsGraphics
4770K Gigabyte Z87 OC Force Sapphire 290x  Sapphire 290x
RAMHard DriveHard DriveHard Drive
Crucial Ballistix Tactical LP Toshiba Q Series Pro Samsung 840 Pro WD Black
Hard DriveCoolingCoolingCooling
Seagate XSPC Raystorm EK-FB GA Z87X-OC Force EK-FC R9-290X - Acetal+Nickel
CoolingCoolingCoolingCooling
EK-FC R9-290X - Acetal+Nickel  XSPC EX420 XSPC D5 Dual Bay Reservoir/Pump Combo External Chiller
OSMonitorKeyboardPower
Windows 10 Dell U2210H x 5 On Custom Mount Logitech Orion Spark G910 Silverstone ST1000-G Evolution
Rosewill Blackhawk-ULTRA Logitech G600 Razer Destructor Sony 5.1 Surround Sound with Powered Subwoofer
 Black Lightning (24 items)
CPUMotherboardGraphicsGraphics
4770K Gigabyte Z87 OC Force Sapphire 290x  Sapphire 290x
RAMHard DriveHard DriveHard Drive
Crucial Ballistix Tactical LP Toshiba Q Series Pro Samsung 840 Pro WD Black
Hard DriveCoolingCoolingCooling
Seagate XSPC Raystorm EK-FB GA Z87X-OC Force EK-FC R9-290X - Acetal+Nickel
CoolingCoolingCoolingCooling
EK-FC R9-290X - Acetal+Nickel  XSPC EX420 XSPC D5 Dual Bay Reservoir/Pump Combo External Chiller
OSMonitorKeyboardPower
Windows 10 Dell U2210H x 5 On Custom Mount Logitech Orion Spark G910 Silverstone ST1000-G Evolution