[StevenWRX]

hi,

i was interested in gathering some information on PM g5 temperatures from different people.

i have a slight concern that my rev b dp 2.0 is running hot even with a very minimal load.


according to the program TEMPERATURE MONITOR (latest version) my temp readings range from:

Main logic board backside 121.5 degrees F

CPU A Die temp 146-166 degrees F
Processor card A Ambient 129.7 degrees F
CPU B Die temp 142-165 degrees F
Processor card B Ambient 125.2 degrees F
Drive Bay 7.8 degrees F
Memory controller heatsink 149-160 degrees F


the low number is when idle or very minimal use
the high number is with moderate use (such as iTunes playing in the background with visual effects on)


also am i supposed to look at the DIE temp? or the processor card ambient temp?






my concern stems from 2 random shutdowns in a 1 week period. i came home and found my computer off.. i push the power button and it starts right up and everything seems fine. is it heat causeing these shutdowns? am i just worrying too much? what else could cause these mystery shutdowns?


thanks in advance.

[StevenWRX]

oh btw, ive had my powermac for about 1 month... the 2 mystery shutdowns have occured this past week and while at FULL idle... since im not home.

it is not a powerouttage since my alarm clocks and microwave times are not reset.

the fans sound normal, with the occasional high speed revs for a few seconds when the temps approach 160 degrees F and up.


thanks

[d.fine]

I've had pretty much the same temps on my 1 week old Rev B DP2.0 GHz, I don't think there's anything to worry about, seems like a pretty normal temp range ...
As for the shutdown, maybe someone alse used the machine and shut it down instead of putting it to sleep ?

edit : I don't think that heat can cause your G5 to wake up and shut down by itself, being in sleep mode is like being shut down, the temperature drops to room temp, nothing is being used.
I did have to think about some energy saver settings, there is an option to have your G5 come on at a specific time by itself, however I don't know if you can also have it shut down by itself, maybe you should check those settings (System prefs> energy saver, I think the second tab)

[Big Mac]

Are your fans constantly audible? Under normal load they shouldn't be. Your numbers do seem a little high to me, but I don't want to worry you even more. Your G5's back is not up near a wall or other barrier, is it? Make sure the back is unobstructed.

It would be nice if a G5 temperature thread was around.

[d.fine]

Check this thread : its about spontaneous shutdowns of a G4, maybe you can get some info out of it.
In this thread they talk about the PSU being the probable cause of these shutdowns due to heat. But it still remains strange that yours shuts down while you left it in sleep mode.

[fiesta cat]

Originally posted by StevenWRX:
according to the program TEMPERATURE MONITOR (latest version) my temp readings range from:

Over on http://xlr8yourmac.com/ some people are saying that 10.3.5 is screwing with their temperature monitoring apps, however your shutdowns don't seem normal...if you'd like, I can be more vage

[StevenWRX]

oh well , i appreciate the feedback, i guess i really shouldnt be too concerned yet.


my fans are on but its a very light hum... just like my previous dell tower..

[fiesta cat]

Originally posted by StevenWRX:
oh well , i appreciate the feedback, i guess i really shouldnt be too concerned yet.

my fans are on but its a very light hum... just like my previous dell tower..

Just remember, if something weird happens (to your OS or whatever), in theory the fans should kick into high speed and protect the machine. Others have said they have managed to hang the OS, and immediately the fans kicked into high speed.

[legacyb4]

My G5 runs at a steady 52 degrees C with about 1-1.5 degree variance in either direction depending on what I'm doing.

I thought it would be more sensitive, but even ripping and burning a DVD seems to have very little effect on overall internal temperatures (not like my Powerbook!).

Cheers.

[legacyb4]

One interesting thing to note is that even sleeping the G5 says that the last recorded temperature was around 30 degrees Celsius. Jumps back up to 50 degrees within 10 minutes of powering up though.

[Eugene Fields]

Originally posted by legacyb4:
One interesting thing to note is that even sleeping the G5 says that the last recorded temperature was around 30 degrees Celsius. Jumps back up to 50 degrees within 10 minutes of powering up though.

Mine are at 49 Don't worry My Unit is DEAD Silent Pinned 24/7 Folding no issues

300RPM Fans when Idle... 900-1200+ When Folding 24/7-2 instences. Very Pleased Silent in all cases!

[Gorloth]

My dual G5 2.0 Ghz is now about 1 year old. I am running 10.3.5 and using Temperature Monitor Ver 2.1 from Bresink Software I am getting the following readings

104.2 Main Logic Board Backside
111.0 CPU A Die Temp
105.0 CPU A card Ambient
109.5 CPU B Die temp
102.7 CPU B card Ambient
84.2 Drive Bay
83.1 Main Logic Board Air Inlet
100.6 Main Logic Board Ambient
129.7 Memory Controller Heatsink

Hope this helps

[macaddict0001]

the tempuratures are in the normal range don't worry about it just use it.

[VukOnCrack]

The drive bay fan on my 2.5 runs at a consistent 1100 RPM (stock machine). The others hover around 600 when using a light load. Anyone else see this (the drive bay fan is the loudest part of the machine though still quiet compared to PCs).

other temps
Main logic 50 C
CPU A die 57 C
CPU A amb 54 C
CPU B die 60 C
CPU B amb 52 C
Dribe Bay 32 C
Memory Ctrl 67 C

[heavyboots]

Yeah, that probably seems pretty normal. I've never bother to install Temperature software on my G5 tower, but the XServe G5 we got runs into the 130's when Retrospect is doing the nightly backup (ie, processing 300k files to figure out which ones are new for the nightly BU).

This is lower than the temps you posted, but the XServe is *much louder*. I figure your temps are higher because your fans are doing more like 3k rpms rather than 6k to 9k rpms like the XServe fans...

[Person Man]

Originally posted by VukOnCrack:
The drive bay fan on my 2.5 runs at a consistent 1100 RPM (stock machine). The others hover around 600 when using a light load. Anyone else see this (the drive bay fan is the loudest part of the machine though still quiet compared to PCs).

Yes, I would hope the drive bay fan spins faster. Originally, the temperature threshold for the drive bay fans (on the first G5s) was too high, so the fans never came on enough, and so lots of hard drives started dying after about 6 months (especially if people added a second drive and/or used the machine a lot). Apple lowered the temperature threshold in one of the 10.3.x updates.

[kentuckyfried]

speaking of hot temperatures...

Have you guys ever had it where you'd come back home, and the fans would be running full blast?


I've come home to my room a few times where that was the case...
but that was near 100 degree weather. I am wondering if during the times when I'm not home, and I know it's going to be a hot weather day, if I should just simply leave the computer on sleep.
(which I didn't do b/c I was downloading movies off of BT).

[Draken]

Here are my current temps with itunes running with visualizer, mail, ichat, yahoo and of course safari:
Logic Board: 121.5F
CPU A Die: 182F
Proc Card A Ambient: 129.2F
CPU B Die: 182.2F
Proc Card B Ambient: 125.6F
Drive Bay: 85.1F
Memory Controller: 164F

Seems high to me for the die temp.... but not sure what they should run.

Cheers



Ooops: Forgot what machine I have - Dual 2.5 with 1gig ram and Radeon 9800 - 74gig 10k SATA Drive and 160Gig 7200rpm SATA drive, Airport, bluetooth....

[Brian Redoutey]

I'd say do something to test it out. With my system fully loaded, which is about identical to yours, the CPUs redline or max out temp wise at 145.6 degrees, both of them. For a RISC based CPU this is abou tnormal. for a x86 Pentium 4 or AMD Athlon system this is a bit too hot.

I"m running 10.3.4 not 10.3.5, I do wonder if the software revisions are screwing with what the temp monitor tool is reporting. Anything over 150 degrees fareinheight I would say is goign to slowly cause problems. Technically it can probably take this level of heat but I'm not sure I'd recommend it. Also if the CPUs are overheating the system should do an emergency shutdown to save itself. At the same time though if the temps are revving this high/hard the fans should be cranked up higher too. Mine don't kick in until about 150 degrees and then it drops 5 degrees and they crank back down. And this is with LightWave rnedering using both CPUs and or Folding at home doing 2 instances (both CPUs doing their own FAH thread).

I'm referring to the CPU die temps, not the cards, not the memory heat sink or anything else like that.

When I first got this sytem it crashed 2 days into any LightWave render I would do, I would have a full kernel panic with the fans maxxed out, the whole wind tunnel effect or jet engine sound as others have called it. After alot of testing I pulled the RAM and put in new stuff, I haven't crashed since, it's been 6 months now. But the idea is the same, if you suspect you have a problem run folding at home or something else very system intensive that will strain the RAM and CPUs. Do it for 2 weeks striaght I"m not kidding, if nothing goes wrong (you can't break it so to speak ) then the system is fine, but if it shuts off or does weird things, you've got a problem somewhere. You can still use the system during testing, just make sure the other stuff is going in the background.

BTW, also check to make sure the room it's in isn't too hot, in my manual the max ambiet room temperature is stated to be something like 95 degrees. As soon as it hits 83 degrees thogh teh drive bay fans kick up in RPM. So yeah, if you're in a 90 degree room the CPUs are going to run on the hot side of things and the fans are going to be going kind of fast too.

Hope this helps you out.

[Mr. Vapor]

I had my dual 2ghz G5 for a month when it started spontanesously going to sleep on me when playing civIII.

In the the console log there was a message about a Thermal runaway. anyways, it turns out the one of my sensors on the motherboard or CPU was bad and was reading false temps, and forcing my box to sleep. I had to get it fixed (under warranty) at a local apple repair shop (hi Happy Mac!).

You'll get an error on the apple hardware diagnostic CD too if this problem is occuring to you.

There's a discussion about the problem (that I had) on Macfixit today <http://www.macfixit.com/article.php?...40903074452460>

[chingas]

What monitor are you using? I had a similar problem with my MDD G4-only to discover that the power switch on my (older) 20" Apple Cinema Display was faulty.

[unregistered]

If your Mac is not spontaneously going to sleep, you should feel lucky. I have had my 2.5 G5 for about 10 days and it spontaneously goes to sleep several times per hour. The cause is the system detects a Thermal runaway condition. This can be seen in the system log. If you are having spontaneous shutdowns, look in the log.

This seems to be a growing problem. Just go to Apple's discussions and search for Thermal Runaway in the "Home > Power Mac > Power Mac G5 > Usage" section.

In short the processor may be idling at 156 Deg F and the temperature suddenly (in seconds) spikes up +40 degrees F. The system responds with fans, but it is too late. The event starts a sequence of events that initiate a sleep. This generates a bunch of system log entries indicating that a thermal runaway condition was detected and the system is being put to sleep.

At times, the temperature will spike +40 deg F, but not go to sleep (It looks to me if the CPU core temp stays under 190 degrees it is fine). If the temperature is 140 deg F to start and then jumps to 180 deg F, then the system doesn't seem to go to sleep.

I have also had a few cases where the temperature jumps and doesn't stop. When it hits somewhere around 220 deg F, the system just freezes. In the freeze cases, the system can't be restarted without it being unplugged and there are red lights on the logic board that light up.

My Mac is currently at an Apple Store. I supplied them with charts and graphs of CPU and temperature histories leading up to the temperature spikes. Just envision a temperature chart that is very flat at 150 - 160 deg F over a period of 10 minutes with a sudden and unexplained jump to 200+ deg F within seconds (and no change in machine activity.

On the other hand, when the spontaneous temperature spike is not occurring, the system and fans seem to cool the CPUs as expected. I can run my system at very close to 100% and the temperature stays under control (until the temperature spike).

I have a page long description of various HW and SW scenarios that I have tested and supplied that to Apple to aid in their process. In short, I have reloaded the OS, run tests with various apps each running by themselves, reset PRAM, removed all peripherals, tested with only Apple keyboard and mouse, set the slewing to Auto, Reduced, Maximum, all energy saver settings off, etc, etc, etc. No additional HW has been added internally. All installed as CTO.

The Apple Hardware Test (run from the CD) came up clean with no errors.

We will see what happens.

[Wes]

I had that same thermal runaway error on my original 2.0 G5. Long story short, I had to take it in on three seperate occasions to get one of the processors replaced. On a happier note, it seems fine now...

[andyeb]

I had the random powering off fault with my original DP G5 @ 2GHz. A clean system install did not fix the problem and eventually I persuaded the dealer to swap it for a new one as I had bought the kit specifically for a project with a close deadline. Not had the same problem with the replacement in 6 months...

I'd look into getting it repaired or replaced if I were you.