Freezing mobo

Rancher:You wrote:

I disagree, with all due respect. If I understand what you mean ... Holding a steaming hot cup of coffee near where you described, the steam should shoot out of an exhaust fan. One would want the steam to head for the exhaust. And you are correct: when the sides of the case are in place, that steam would get out even quicker. Hot air rises, cool air falls. I don't understand the "starving the CPU fan for air" concept. The air shouldn't be static, and it isn't. As the hot air shoots out of an exhaust fan, cool air is drawn in from the bottom front of the case, likely at an equal rate. This constant supply of cool air is the goal of case ventilation.


Edit:I agree with the "large slower fan" idea, by the way. Again, if you are making any reference to my post, I wrote that my fans are throttled to "low" speed. I have observed, however, that when I was running hotter CPUs {1.2 GHz TBird} and/or vidcards that would stress/draw more on the the CPU {e.g., I was using a Creative Labs - can't remember exact name of the card! ... NVidia chipset, though ...GTS 32MB DDR before switching to Matrox for dual monitor support}, I would flick the fans (the 120mm) to "Hi" speed and the temp would drop right off. Though not unbearable nor even uncomfortable, the added noise was irritating.


Brangwen

 

Teacher:

One last point - it seems this thread has gotten away from you!

Make certain the CPU voltage is correctly set (default). If set too high, it will cause the CPU to generate more heat than it should. Overclockers will sometimes increase the core voltage to get the CPU to run a bit faster with more stability but this does cause the CPU to run hotter.

The voltage settings are either on the motherboard jumpers or in the BIOS. Check your manual, as I'm not familiar with that particular board. In all likelihood, the voltage settings will be in your BIOS, as motherboards these days are pretty much jumperless (except for clearing CMOS and setting FSB 100 - 133).

60C will not burn up that CPU, as has been suggested in this thread. It may cause your system to lock up ... maybe not. Your problem may not be heat related at all! The CPU temperature tolerances are listed in certain forums. Try www.AMDzone.com !

When you boot, does the proper CPU, i.e., "1800+" show on the POST screen? I'm wondering if your FSB is set incorrectly ...

Please post how you made out.


Brangwen

 

computer locks up=heat

No, my last post was NOT for you Brangwen. Didn't you notice the very first name was Rockster2U ?

Sorry ya don't get the fans fightin' for air gig! No biggy, I get it & have run "colored air" test but thought the steamin' hot coffee mite be more layman style. Yes TEACH is watchin us

 

Teacher:

Email me directly if you have further questions.

Good luck.

Brangwen

 

Hehehe ......... this gets good. Hope teacher has the point re: pushing hot air.

Thanks for the comments - I need a good HVAC man.

To dispell the not so obvious - I have a turbine exhaust in the lower back over #6 PCI, also have a slow speed exhaust venting real close to the CPU. Variable speed ThermalTake with a heat sensor in the front intake. Dual fan card cooler positioned over the AGP card (64mb DDR Radeon All in Wonder) Dual fan Leadman 400W power supply with variable speed and heat sensor. Mfg's fans on Video card, chipset and in the back of my hotswap bay. Normally this type of setup works real well for me. This particular cpu - 1.4 TBird 200mhz just seems to run hot. I've taken it up to 1.6+ and it runs about the same (2-3C) higher at default voltages including core. It sits in a confined area (cradenza cabinent bay with no back panel and an open front door) that it shares with a 1300 TBird OC'ed to 1500 at slightly increased voltages. Both using round braided cables throughout and both with DVD, CDRW,Zip, floppy, 3 HDD's and 512mb PC150 Cas2 OCZ. Neither run as cool as a 1200 OC'ed to 1515, but that sits in a taller tower next to my desk.

I appreciate any and all suggestions and believe this is all about trial and error to get the right mix that is going to move enough air through this case. I haven't ruled out that 24 gauge pipe yet either. No, I'm not going to peltier chips or water cooling and I don't like the noise some of the higher speed high cfm create.

I'll get this puppy figured out eventually and hopefully, thanks to this discussion, Teacher has a new appreciation for the value of proper cooling.

 

heat=lockup cpu

Rockster2U real nice setup ya got there. That turbine fan over pci slot#6 I've found is the way ta go on short cases. Ya know your taller case runs cooler, eh? I love those round cables too, lets the air move around better; "Teach! Are ya lurking?" Try this site for more cool ideas on cooling.
http://www.pcmods.com/?AID=1935325&PID=869401

 

Teacher: You sound like a piece of work! More power to you with the "colored air" test, etc. I still don't buy your theory or test results, but I may simply be misunderstanding you and vise-versa. "No biggy."

Rockster2U: Wow, I'm a tad surprised the 1.4 TB is running hot ... Though a 200FSB ... I reckon mine (still sitting on a Iwill266Plus board, with HSF & memory in tact in the corner should I need a quick replacement) is a 1.4 TB with 266 FSB ... (266 sound right ... yeah, it must be ...) hence it runs cooler? I don't know and I've forgotten much about my TBirds ... I do recall that MY 1.4 only OC'ed to about 1.54 give or take a few/hundreths ... but it may have been locked (though, as I recall: I remember changing divider values, so it likely was not locked), and my flavor of FSB was not the choice for OC'ers. And it's temp stayed low like my 1.33 @ 1.54 GHz. (I kept all my CPUs at default vcore). I eventually just ran the 1.4 TB at default then kicked up to the 1.6 GHz (XP 1900+) when it came out, mainly because I wanted to try a DDR board and ATA/133. All my prior boards had been PC133 SDRAM only.

Note: As I was reading over this, I recall my 1.2 GHz was (supposed to be) the great overclocker, if one obtained the lower FSB model. It ran HOT! (I'm thinkin' 200FSB? See, I'm getting confused from when I was building my last Intel: a 600E Coppermine, and I may be confusing the FSB frequencies with that overclocking disaster!)

Well, if Teacher is still reading this ... I hope he went away with something from our experiences.

Take care ... I'll be around.

Brangwen

 

My problem is now solved - A big copper heat sink with a large fan on top keeps the temperature at 45 degrees or less under full load. I decided to make the test severe and did it in a very warm room too with the air temperature about 30 degrees which in Fahrenheit is the high eighties.

I still wonder though why I needed to mess about like this. I designed the system to the specs for system case and case ventilation on the AMD web site. I used an AMD fan and processor combination deliberately to try and avoid heat problems. Perhaps naively I assumed that if I did that it would all work properly. I also note on the AMD web site that the FAQ for the XP chip includes "What's the maximum temperature my chip should run at?" (Or something close to that). The given answer is 90 degrees centigrade. So perhaps in future I will treat everything AMD says with a bit of caution and ask you guys first.

Anyway - thanks for the help one and all. It got me thinking and going on the right lines and, as Shakespeare said, "All's well that ends well! "

 

PLUNK

Kewl teacher! Yer rite don't believe that 90c sh-t. happy days to ya