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% reduction vs. temp reduction

M

marty9876

[H]ard|DCer of the Month - February 2006
Joined
Jun 11, 2003
Messages
4,906
I’ve got some boxen, well basically inside a different box. Computer is located in a limited air flow situation. They be running a touch warm, and *might* be screwing up the application they are suposta be running (way not cool).

Question is: Does any know at what general ratio decreasing the folding application, % wise from 100 % to 90/75/60/50 %? How this affects the heat output of the boxen? Make sense? I assume there is a sweet spot someplace, I’m thinking that reducing it 50%, the box does not create 50% less heat ect. Something like reducing it 50% the box makes 35% less heat or what ever.

What I’m most concerned about is the ambit temperature these boxen are, stressing the motherboard ect. Temp monitors show the boxen running basically right close to recommended temp limits.

Thanks- Marty
 
Marty,

I don't know of a ratio. I run a couple of laptops which have limited cooling capability and had to experiment to get a stable answer. You might want to try to recreate the environment and see what the answer is.
 
Hey Marty I imagine that this box in a box you speak of is a re-acurring phenomenon.
You should be able to run tests on a single unit and come up with a safe ratio to deploy into the field.
Unfourtunatly you will have to run these tests yourself to figure out that safe ratio.

Good luck man!

 
The problem is said error condition can't be reporduced as of yet. We just don't know what's causing it, and it happens to have happened on you know which boxen.... :eek:

New platform for the application, well new application too so many variables.

I guess if I can run some numbers in the shop and see what get's a large temp break.

Next order will have an extra fan in the computer, but the ambit temp will still be just as warm.
 
towert7 said:
I Think it would be better to underclock a processor and run it at 100%, then to have the same clock and and run it at say... 70%.

Or is underclocking not an option?
Click to expand...

These boxen of Martys are working boxen meaning that they have another higher priorty purpose to do first and formost....I think underclocking is not the answer.

I live in the desert Marty if I can help some how let me know!

 
Funny, I specifically by Intel motherboards so I can't overclock them (I'd light these things up with 240v if I could...), but that means I also can't under clock them.
 
I have never seen a reduction of heat by turning the clocking down, All of my boxen are overclocked as much as posible and still be stable. the temp doesn't change enough when clocking them back to stock to bother with.

Also the Temps in the computer room have been over a hundred all week as the ac unit had a problem, have not had a single box shut down, or any bad work units turned in.

All of the boxen are toasty, but none have showed any stability problems, it may be that that one boxen is just not happy folding at 100%, due to memory, cpu, motherboard and programs just not working as well as identical machines.

I have 6 boxen that are identical, same box, OS, motherboard, cpu, memory, fan, powersupply, network card everything, one shuts down if the power even thinks about blinking, another won't clock as high and be stable, no reason other than manufacturing differences in the individual parts, its only 33 Mhz so no sense in worring about it,. the one that shuts down has had every part swapped out with another box and still does it so it must be the motherboard, and will do it even after changing the UPS it is hooked to twice.

No reason for anything to do wierd stuff but it still does,

Murphy is the best employee, he always shows up for work :D
 
I dunno, it is kinda warm- I'm gonna try 75% for 24 hours and see where it's at tomorrow evening. I'm speciffically only running normal WU's to keep things cooler. Lemme know your thoughts.

2.53 Celeron Intel MB 915 chipset. Also have 2.4 Celrons with 856 Intel MB

warm1002rl.jpg
 
Is this just one box or a bunch of them Marty? I thought it was a number of them....they are all having the same temp issues?
Those ambient temps are pretty high for my tastes!

The fans on the cpu's are working..right? I'm sure they must be working somewhat but boy thats toasty! :eek:
I see your concerne.

 
It's a number of them and they all identical. Yea, fans have to be working or box would be dead.

Basically, think ATM's or cash machines- and but your boxen inside them in a regular case.

Right now I'm @ about 15 of these borged, great part is they run 24/7/365.
 
marty9876 said:
,snip>
Basically, think ATM's or cash machines- and but your boxen inside them in a regular case.

Right now I'm @ about 15 of these borged, great part is they run 24/7/365.
Click to expand...

ROFLMAO - GAAD think of borging all the ATM's in the area! Would they give out folded money?

 
gnewbury said:
ROFLMAO - GAAD think of borging all the ATM's in the area! Would they give out folded money?

Click to expand...


Of course its folding money....it the only kind that matters! :D

 
gnewbury said:
ROFLMAO - GAAD think of borging all the ATM's in the area! Would they give out folded money?

Click to expand...

Ladies and gentlemen, put your hands together for gnewbury. He'll be here all week, don't forget to tip your waitress. :D :p

 
@ 75% for 24 hours. Next run will be @ 50% for 24 hours. After that it's getting almost not worth folding on these...

warm750jb.jpg
 
Well hell, not sure what to say. 1st one is @ 50%, 2nd one is at 0% (folding off). I could run more airflow through the outer case, but then that's just more dust and crap inside.

On the plus side.... I figured out I can borg my dialups. That's ~220 gzh per year (~110 gzh @ 50%). Now I just need to get off by but and borg them all. Running a test unit right now.

So, 50% best guess?

The problem before is IIS quit responding, hence stopping my application from running. Not sure what this was causes by, application error or boxen too warm.

50%-
warm502ky.jpg


0%-
warm007md.jpg
 
Marty, You should try Lapping your heatsink. I have 2 boxes that where running to hot.
I lapped both Heatinks, and put some new AS5 on. One cpu I saw a 2C drop, but the other
CPU dropped 7C at 100% load. Copper or aluminum, Lapping does help.
 
Thanks DR_K. These are production units, basically the same boxen I "break in", then get deployed. End on July, and I'll have gone through ~100 of these. Lapping the heat sinks it not *really* an option. Honestly from what I can tell, it's system zone 2 (ram?) causing the problems.

I'm adding a second cooling fan on the next boxen order, I'll play with the shell cooling fan (sucking or blowing) and maybe add a second shell cooling fan I guess. I actually just thought of this, the shells were designed for P2 class machines, and I'm sticking a P4 celeron in them. More air flow, more dust/dirt however.

What's got me somewhat concerned is on 0% load, the box is not exactly cool to begin with. My techs are gonna kill me if I say "hey, I need you to go around to all the units and install another cooling fan...." ahh hell it's what I pay them for I guess.
 
man that sucks. Do you have any pics of the cases ( in and out) ? Maybe I can help with airflow. ( one of the only things I am good at , aircooling) lol
 
DR_K13 said:
man that sucks. Do you have any pics of the cases ( in and out) ? Maybe I can help with airflow. ( one of the only things I am good at , aircooling) lol
Click to expand...

Can do tomorrow. I think the ambit temps will be the problem.

I think I'll run a whole crap load of numbers-

100% load in shell w/ two cooling fans (in warehouse- hot back there)
100% load not in shell with one cooling fan (in office- baseline number)
100% load in shell w/ two cooling fans (in office- AC)
100% load not in shell w/ two colling fans (in office AC)
100% load with shell colling fan reversed (blowing instead of sucking)

Try lapping a heatsink maybe. That's alot of heat sinks to lap... :eek:
 
KodiakStar said:
Get your tech people to do it for you ;)
Click to expand...

Something this important (folding boxen) I might just have to do myself... ;)

The sweet thing is I can borg my dialups hopefully. That will be big numbers adding up.
 
Well this might be the problem, ambit shell temp 94.0 F, air intake to CPU 106.5 F.

Hot air blowing on hot air = hot air?
 
that's getting up there, all right. is there any way you could better ventilate the box the boxen are in?

i don't think folding would cause issues unless they're running out of memory. heat - that's hot, but not too hot. i think 70C+ is where it starts to become an issue (throttling kicks in)
<- add about 6k to that, the numbers are off
 
Just an update- Looking good.

CPU/System Zone 1/System zone 2

As Is:60/50/50

Cabnet fan reversed (blowing out): 55/44/44

Adding secondary computer cooling fan to computer case w/ cabnet fan reversed: 55/44/44

So, now all I need is my field guys to reverse the fans. You basically have to take the whole friggin device apart to do this but.... Well if they don't quit cuz of this it's all good.

Cooler temp, borging my dialups.... Major 24/7/365 ponitage coming up.

:D :) :cool: :eek:
 
marty9876 said:
Just an update- Looking good.

CPU/System Zone 1/System zone 2

As Is:60/50/50

Cabnet fan reversed (blowing out): 55/44/44

Adding secondary computer cooling fan to computer case w/ cabnet fan reversed: 55/44/44

So, now all I need is my field guys to reverse the fans. You basically have to take the whole friggin device apart to do this but.... Well if they don't quit cuz of this it's all good.

Cooler temp, borging my dialups.... Major 24/7/365 ponitage coming up.

:D :) :cool: :eek:
Click to expand...


Excellent!!! Good luck Marty!!

 
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