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Profile [B@H] Ray
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Message 1148 - Posted: 19 Jul 2007, 18:23:59 UTC

Has anyone running Cosmology had heat problems with there systems with it?

I find that all three systems run about 2 to 3 degrees C hotter than with other programs. It also slows down CPDN SAP.

When running SAP and Cosmology on a duel core SAP takes the same CPU time but misses a lot of cycles so it takes about a extra hour of wall clock time per trickle.

Don't know if that is my systems or the application for this program.

Not related, the P4 3.06 HT cpu seems to have gone last night, put in a moble P4 3.06 HT that runs at 1.8 GHz in a desktop. Times for Cosmology went from ~17 Min. to ~ 34 Min but still doing 2 at a time. Sure wish that board would support the 800 FSB, not many choices with having to use 533 FSB CPU's. I really have to replace the 2 older systems.


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Message 1149 - Posted: 19 Jul 2007, 18:26:20 UTC

I hadn´t seen this here at Cosmology. But at QMC you can watch the same thing. But I doon´t know a solution.
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Message 1150 - Posted: 19 Jul 2007, 18:37:19 UTC - in response to Message 1149.  
Last modified: 19 Jul 2007, 18:39:56 UTC

I hadn´t seen this here at Cosmology. But at QMC you can watch the same thing. But I doon´t know a solution.

I have no problem with QMC, that if whare I have most of my credits. Think it is these old systems. 2 old systems and one newer T2250, the T2250 (centreano Duo 1.73 Ghz 2 Meg. L2) is whare I have the SAP model running. May have to reset Cosmology there to get SAP running correct.

Cosmology running best now on the P4 2.4 without HT. will keep it going there if not the other systems. I may change to only running Cosmology on the 2.4 (the 4.5 credits are still reasionable but liked the 6 better)



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Message 1151 - Posted: 19 Jul 2007, 19:36:50 UTC

More heat means more work at the same time = more efficent code

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Message 1152 - Posted: 19 Jul 2007, 20:11:07 UTC - in response to Message 1151.  

More heat means more work at the same time = more efficent code


exactly.

it also depends on what kind of work is done.... if you have code that runs within L1 cache, you have less wait cycles... wait cycles means less power consumption.

distributed.net client shows this very well.... very small code... heats up the cpu like nothing.

I have HT xeons 2.6 GHz. They go up to 18 min per wu, but not much higher... 2.8 GHz is their clockspeed.

regards,

sysfried

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Message 1158 - Posted: 19 Jul 2007, 21:22:09 UTC

Yup, I see the same on my X3220. The cpu runs at 48 degrees, which is 3 more than in most projects. RieselSieve Linux 64-bit is the heat champion though. Gets my cpu over 50 degrees, and cores running nearly at 75. No problem in itself, but definitely something to keep an eye on when room temperatures get high.

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Message 1164 - Posted: 19 Jul 2007, 22:23:19 UTC

I have it running just on the P4 2.4 now, that one runs good with it.

The T2250 was lousing to much time on SAP with Cosmology running on the other core, close to 4 hours a day. I like the SAP project so Cosmology stopped.

Not sure what to do with the P4 3.06 HT for now, that got so hot it crashed BOINC. On restarting BOINC the temp went from 42 C up to 56 C (and still climbing). When taking the heatsink off I did not know till to late that the CPU was almost welded to it and the CPU was pulled out with the heat sink, one pin bent. can't see fine things good to fix it but know how. Put the Moble P4 3.06 (running at 1.8 in desktop) in there for now. Sure wish that the board burned out as I have the OME WIN XP and MS considers it a new system if you change the board when one was still working. If you buy windows and plan on changeing the board in the future get the full retail copy not the OME.
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Message 1179 - Posted: 20 Jul 2007, 5:13:41 UTC
Last modified: 20 Jul 2007, 5:20:30 UTC

I guess I assume to many things.
Joining any project like boinc that loads your CPU 100% should make any common sense thinking person that heat is involved.

Most people involved with Boinc have at least some basic system building skills and removing heat in system is as simple as a $5 case fan front and rear and usually a cpu heatsink other than what the manufacturer provided.
I dont mean some $75 ninja heatsink made from Unobtainium-235....but a quality heatsink in the $20 range with a good fan.
With monthly maintenance it will function fine.

I know my Koolance liquid cooled machines are a bit on the extravagant side...but...I think a $400.oo liquid cooled case is cheap insurance when Boinc-ing a pair of $1000.oo+ Xeon 5355 cpus.

My *wet* cpus run at average temp of 95 degree F in the summer heat.
dual xeon 5355
dual opty 2218
C2Q e6700 x2
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Message 1210 - Posted: 20 Jul 2007, 14:36:23 UTC

Who said that they did not have extra fans?
I have a 120 MM in the frunt of each case, and 2 60 MM fans moving air out.

That is a good thing to mention for the newer people here.
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Message 1213 - Posted: 20 Jul 2007, 16:54:04 UTC
Last modified: 20 Jul 2007, 17:04:02 UTC

More about the CPU that seems to have gone.

The board that was on is a socket 478 and only supports the 400 and 533 FSB. There was only one P4 with HT made that can run on that board, the Northwood 3.06. That is a very hard CPU to find and usually sells for more than they are worth due to not to many of them being around. I have seen them going for over $200 US at Ebay, way to much for that espically whit only a 512K L2.

The one that I have I got used for only $20 US, the seller said that he has had problems with it and I could return it if it did not work. I used it for 3 Mo. so I really can't return it now. The last owner got it used also, so it could have been way overclocked at one time in the past. It was not my system that caused the overheating, probabbly somethig wrong with the CPU.

When taking the heatsink off I did not realize that the CPU was comming out with it, the lock on the socket usually holds them. With a tight space and not knowing the cpu was attached I bent two pins. They are easy to strighten if they don't brake. These old hands of mine are not steady enoughf for doing that so I will take it out and see if a shop will do that. The other P4 that I put in is running nice and cool, no problems but a lot slower.

I won't get another CPU for that old board, if I do anything I will get a new board whare I have a wide choice of CPU's. I have been holding off on that as Intel has announced that the prices of the quads will have a BIG drop in a coupple weeks when they bring out there new CPU's. The Q6600 (2.4 GHz) should go down to about $260 US. When that happens I think that the Core 2 Duo's should drop also but nothing was said about that.

So if you are thining of getting one of the quads just hold off a little more and see what happens with the price.

Also as said in the last post you can not have to much cooling, besides the three additional case fans I also have one on the hard drive and heatsinks on the memory chips. The way the memory heatsinks are made it looks like they would not do anything but they did lower the temp by about 3 degrees C.

Anything that you do to help keep parts of the system cooler will pay off in the long run even if not pushing them hard as we do with BOINC. The only thing that they can not stop is making old things look fast compaired to the newer things that they are comming out with. I can make things in that system last longer but it is still just a 533 FSB Socket 478 P4 system. (origionally a Celeron D @ 2.93)


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Message 1215 - Posted: 20 Jul 2007, 17:29:45 UTC - in response to Message 1213.  

More about the CPU that seems to have gone.

The board that was on is a socket 478 and only supports the 400 and 533 FSB. There was only one P4 with HT made that can run on that board, the Northwood 3.06. That is a very hard CPU to find and usually sells for more than they are worth due to not to many of them being around. I have seen them going for over $200 US at Ebay, way to much for that espically whit only a 512K L2.

The one that I have I got used for only $20 US, the seller said that he has had problems with it and I could return it if it did not work. I used it for 3 Mo. so I really can't return it now. The last owner got it used also, so it could have been way overclocked at one time in the past. It was not my system that caused the overheating, probabbly somethig wrong with the CPU.

When taking the heatsink off I did not realize that the CPU was comming out with it, the lock on the socket usually holds them. With a tight space and not knowing the cpu was attached I bent two pins. They are easy to strighten if they don't brake. These old hands of mine are not steady enoughf for doing that so I will take it out and see if a shop will do that. The other P4 that I put in is running nice and cool, no problems but a lot slower.

I won't get another CPU for that old board, if I do anything I will get a new board whare I have a wide choice of CPU's. I have been holding off on that as Intel has announced that the prices of the quads will have a BIG drop in a coupple weeks when they bring out there new CPU's. The Q6600 (2.4 GHz) should go down to about $260 US. When that happens I think that the Core 2 Duo's should drop also but nothing was said about that.

So if you are thining of getting one of the quads just hold off a little more and see what happens with the price.

Also as said in the last post you can not have to much cooling, besides the three additional case fans I also have one on the hard drive and heatsinks on the memory chips. The way the memory heatsinks are made it looks like they would not do anything but they did lower the temp by about 3 degrees C.

Anything that you do to help keep parts of the system cooler will pay off in the long run even if not pushing them hard as we do with BOINC. The only thing that they can not stop is making old things look fast compaired to the newer things that they are comming out with. I can make things in that system last longer but it is still just a 533 FSB Socket 478 P4 system. (origionally a Celeron D @ 2.93)


The majority of the boards that would run the HT socket 478 Northwood (which was somewhat of a rarity) will also run the P4 Prescotts if I'm not mistaken. The MB specs are usually written somewhat bass-ackwards. I have on that says it will run a P4 Prescott or a P4 Northwood 533 only. If you read that wrong you think you can't run a 3.0 GHz P4 Prescott (which is what I have in the board now). The P4 Prescotts can be had for $60-$80 "new".


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Message 1218 - Posted: 20 Jul 2007, 17:52:15 UTC - in response to Message 1215.  
Last modified: 20 Jul 2007, 18:02:16 UTC


The majority of the boards that would run the HT socket 478 Northwood (which was somewhat of a rarity) will also run the P4 Prescotts if I'm not mistaken. The MB specs are usually written somewhat bass-ackwards. I have on that says it will run a P4 Prescott or a P4 Northwood 533 only. If you read that wrong you think you can't run a 3.0 GHz P4 Prescott (which is what I have in the board now). The P4 Prescotts can be had for $60-$80 "new".

That depends on the bois on the board. Most bios's for the P4 HT would run the 533 or the 800 FSB, a few like mine only the 533 FSB. It will run the Prescotts as long as they have the 533 FSB like the celeron and non HT P4's. Actually for half the projects the celeron ran faster than the P4's (slower on others due to only a 256K L2). But only one at a time so even the moble P4 running at 1.8 with HT and a 1 meg L2 gets more work done and about 35% more credits. If I could run a Prescott 3.0 HT I would have one in there.

BOTTOM LINE
If you are going to get a new board make sure that it will run everythig that is new out there even if you do not plan on useing some features. That will make upgrades easier in the future. At the end of the Mo. Intel will be releasing new Core 2 Duo's with a 1333 FSB. If you are getting a 1066 Core 2 Duo be sure that the board will also run the 1333 for future upgrades.

EDIT
Same would go for AMD, you can get some good deals on board and CPU combinations with the socket 939, it would be better to let them go by and get a socket AM2 board.


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Message 1271 - Posted: 21 Jul 2007, 2:03:01 UTC

I got the bent pins fixed today and put the CPU back in tonight. Holding a nice and cool 52 C with ABC and RCN running together. Everything seems faster now on the system, will have to see how the WU's do. Now do I dare run Cosmology on that one again? Sure I will after making sure it stays cool with other things.


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