Is my dual 2.5 PM running too hot?

50thVert

macrumors regular
Original poster
Jun 20, 2005
183
0
St. Louis, MO
hey every1,
Im putting some pretty heavy loads on my new dual 2.5ghz PM, and the temp monitor is reading at 86*C for both CPUs and the fans are dead silent :eek:

Just curious, is this the normal output of heat for the G5? Im converting from the Athlon64 camp, where idle is normally around 35*C, full load is 60*C and if you hit 70*C kiss your cpu goodbye.

Can someone enlighten me?
-Zach
 

homerjward

macrumors 68030
May 11, 2004
2,745
0
fig tree
wow. from your description my athlon 64's running pretty damn hot...43 degrees idle with all my case fans full blast! (stock cooler) anyway, if it's 86 degrees celsius, yeah, i'd say that's incredibly too hot. did you check to make sure all fans are plugged in? one might have come unplugged or something. you havent experienced any thermally-induced shutdowns have you?
 

50thVert

macrumors regular
Original poster
Jun 20, 2005
183
0
St. Louis, MO
Homerjward, it all depends on your total setup. My athlon64 system was in a lian-li v2100b case with a xp-120 heatsink, 120mm x 38mm fan right on the heatsink, and a 120mm fan right beside it venting heat. :) She now runs about the same as yours because i put the stock HSF back on and put everything in a normal sized case.

Good to know my G5 is okay, even though thats still horribly hot for any chips to run at. I havent experienced any thermal hiccups, let alone shutdowns.
 

aussie_geek

macrumors 65816
Apr 19, 2004
1,092
0
Sydney Australia
No worries mate - Mac's run hot, they have for a few years now. My G5 sits between 65 -75 c when idle. Under load the temps are about the same as yours. The fans speed up initially but then drop back. They are a little noisier that idle but still, they are pretty quiet.

aussie_geek
 

cleanup

macrumors 68030
Jun 26, 2005
2,643
10
Toronto
And I thought my iMac G5 ran hot (50-65 Celsius at idle)...

Do PowerMac G5s run hot because they have two G5s right beside each other? Couldn't Apple have spaced them apart a little, so they don't share the heat?
 

bigredsixer

macrumors newbie
Aug 7, 2005
17
0
50thVert said:
hey every1,
Im putting some pretty heavy loads on my new dual 2.5ghz PM, and the temp monitor is reading at 86*C for both CPUs and the fans are dead silent :eek:

Just curious, is this the normal output of heat for the G5? Im converting from the Athlon64 camp, where idle is normally around 35*C, full load is 60*C and if you hit 70*C kiss your cpu goodbye.

Can someone enlighten me?
-Zach
Wow that is hot. Even your 64 sounds like it runs hot. My Athlon64 runs idle at 25C and 35C when in full load. I have nothing but stock heatsink and fans. Giant case though. I should have my powerbook by tomorrow or Friday so I wonder how hot those run.
 

gekko513

macrumors 603
Oct 16, 2003
6,302
1
It seems like this is normal for the PM, and if it is, it should be nothing to worry about. If the fans had run full speed, the processors could probably have been cooled down to the Athlon temps mentioned, but if it's not necessary, why make the extra noise.
 

Vlade

macrumors 6502a
Feb 2, 2003
959
0
Meadville, PA
I thought steve was overreacting when he said the G5s run hot, but my Athlon64 running at 2.7GHZ@1.6v gets 45C degree load temps with a XP-90 HS. Thats being overvolted and overclocked 35% and its only 45C degrees. Now if I wanted to run it at the stock speed of 2GHZ I could get it to lower 30s and in the high 20s if I safely undervolted.

If your CPU gets too hot it should have a safety mechanism that shuts it down (idk for sure but its a common feature nowadays)
 
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