[dwolf725]

I was wondering if anyone could provide any input on the heat output difference between a macpro 2.66 and a dual 2.0ghz g5? I have a revA dual g5 and the heat constantly pours out of the back, and of course it keeps my office quite warm even though I'm not doing anything intense on the g5. In addition to boot camp, parallels and everything else that the Macpro offers, a cooler office would definitely be a huge plus. Anyone have any ideas?


P.S. I've been a long time lurker and a long time mac user, but its never too late to be a member.

[cgc]

I sit next to my MacPro and feel no heat. If I were to bet, I'd say it shouldn't me any hotter than a G5 and probably less on average. Turning up the air conditioning might help

[mduell]

Not exactly your PowerMac, but close enough:
Idle 410 BTU/h
Max 1386 BTU/h

Mac Pro:
Idle 584 BTU/h
Max 853 BTU/h

[rehoot]

Heat output is highly dependent on the hardware in the computer and what you are doing with it. Here is a link that shows some power usage rates that might be a starting point. Remember that if you have different hardware or are doing different things, the numbers will change:

http://www.macintouch.com/reviews/ma...enchmarks.html

[dwolf725]

Originally Posted by mduell 

Not exactly your PowerMac, but close enough:
Idle 410 BTU/h
Max 1386 BTU/h

Mac Pro:
Idle 584 BTU/h
Max 853 BTU/h

Actually here's the link to the revA G5s.
Power Mac G5: Power Consumption and Thermal Output (BTU) Information

Idle 410 BTU/h
Max 2060 BTU/h

The range between idle and max BTUs between the g5 and macpro is unreal. If you want to go by BTU's, It might be safe to say that the MacPro puts out less heat under load then the g5 would theoretically put out under similar load.

[nerd]

I can tell a big difference when feeling behind my MacPro compared to my first gen G5.

[justmetoo]

Here are some sobering facts from MacWorld Review comparing the G5 Quad 2.5GHz to the MacPro Quad 2.66 GHz [http://www.macworld.com/2006/08/revi...rev/index.php]. While you seem to be concerned about heat output, heat only comes with power usage, and the G5's are powerhogs. So save some $$$ on the monthly power bill as well and get a MacPro; I've never looked back... Also, you can use a less expensive and lower VA UPS...

>>>When it comes to processors, using a lot of energy and generating heat go hand in hand—and these Xeons use less power and throw off less heat than the G5 chips. The Mac Pro has four fans (down from nine fans plus a liquid cooling system in the G5), and they run much quieter than the fans on the G5. On my Power Mac G5, kicking a processor-intensive job into high gear (encoding a video, for example) would immediately result in an audible crank-up of the computer’s fans. The Mac Pro, in contrast, remains remarkably quiet even during heavy use. All the sounds I noticed emanating from the Mac Pro were from three SATA drives, not cooling fans.
When we used an ammeter to test the power usage of the 2.66GHz Mac Pro against the Power Mac G5 Quad (4 mice; February 2006), we found that the Mac Pro definitely used less energy. The G5 used 92 percent more power when starting up, 88 percent more when running an Unreal Tournament 2004 demo, 62 percent more when idle, and 242 percent more when sleeping.<<<