How I decreased the temp of my 1G Duron!

[acid_burn~187]

Hey everyone. Alright, at x-mas i bought an 800 mhz gig druon and immediatley o/c'd it to a gig. It was running at 61!!! OUCH! So I got myself a FOP32. Down to 53 (with the side off).. not too shabby... and it's been stable since.

However. Recently i had a few extra bucks to spend so I did some mods.:

- First I rounded all the cables, 3 IDE cables and the floppy.
- Then I put in a really powerfull fan in the back and replaced the fan in the front.
- I also turned the fan over on the processor so that it's blowing into it instead of away.
- I added a fan on teh vid card so that it blows down into a blower pluged into the pci slot just below it.
- The last thing was a drive bay cooler in front.

The result??? from 53 with the case side off, to 46 with the side on!!
Awesome! http://www.sysopt.com/forum/smile.gif
I can now play UT without the air conditioner on. http://www.sysopt.com/forum/smile.gif

~Paul

[AuraEdge]

Thats correct Dputiger. The only cooler I know off that is supposed to work the other way is the Alpha coolers (w/ shroud) and possibly the hedgehog, since that has a shroud too.
Actually that probably accounted for 80-90% of the temperature improvement since the tempurature is measured under the CPU. Cooling the video card will not help CPU temps. Rounding cables will, but not that much.

The back exhaust and front intake is important in highering overall air cooling in the case, but wont drastically lower temps in the small air pocket under the CPU.

Still, when you can get temps cooler with the case on than off, then you know you have excellent airflow in your case.

[Toddly]

My Anthlon 750 was running at 850 or so and the temp was 55C when working RC5. I was kinda concerned so I put in a front case fan and that combined with the rear fan lowered my temps to 44-45 depending on the temperature in the house. The inisdid system temperature dropped.I was pleased as I don't want a lot of noise in the room where the computer is located and I still had my chip running happily at 850.

[sunofwolf]

I had a problem with the fop 32-1 also at 1050mz with a duron 700, case did have good air flow, but heatsink was a little weak. Replaced fop with a alpha 66t with duel fans,ytech amd delta 22cmf, more air flow and better heatsink, now my temp are always under 40C. running now at 1083mz at 1.85voltss full blast. Never gets too hot now.

[araaraara]

I'm glad my new(and still empty) case has mountings for a 60mm fan in the front, 2 80mm fans in the back and has lots of holes.

Still getting used to my new MS Natural Elite keyboard!

[This message has been edited by araaraara (edited 06-11-2001).]

[Target]

Its all in the details isn't it? <lol>.

All kidding aside, sounds like you did a heck of a job in lowering your temperatures from what you started with.......nice going!

[Dputiger]

Acid,

You make a really important point here. The problem was the cooling inside the case.

One question, however:

I'm not sure what you did to your FOP-32 (I have used five of these in computer builds). My understanding was that the fan is SUPPOSED to suck air down towards the CPU, NOT pull air up from the CPU.

Other than that, excellent work. My findings on cooling my own case mirror yours--just by adding a few fans I greatly decreased case temp.

[otheos]

Great job!

as long as it's stable, let it fry! who cares how hot it is!

[acid_burn~187]

About the CPU fan. When it's blowing away from the heatsink, it wouldn't help all that much. By making sure the fan is pointing into the heatsink made a diff of about 5 degrees.

~Paul

[This message has been edited by acid_burn~187 (edited 06-12-2001).]

[araaraara]

I took a fan out of an IBM 386 to put in my case. After trying to take off the psu cover so I could get at the screws, I got pissed off and ripped the thing out, breaking one side of it's screw holes(who needs a guard on the other side?). It took it home and found out that the holes are about 5mm wider apart than the ones in my case. DARN!!! Going to have to find some more victims...

(you don't want to know what I do the other computers which don't cooperate...[I've thrown a couple of old 286's off the roof before http://www.sysopt.com/forum/biggrin.gif])

Don't report me to the computer abuse center http://www.sysopt.com/forum/frown.gif

[This message has been edited by araaraara (edited 06-13-2001).]

[acid_burn~187]

I won't. http://www.sysopt.com/forum/smile.gif I'v destroyed a few comps myself. 2 8086s a few years back. hehe http://www.sysopt.com/forum/smile.gif Thats when i learned that a piece of silicon roughly 16 inches will will easily bend in half so it will touch end to end without breaking. http://www.sysopt.com/forum/wink.gif


~Paul

[msterzer]

What do all you people think about more fans to blow air in, creating positive pressure in the case or more fans out, creating negative pressure in the case? In our dirty environment at work, I've used fans with filtered air to create pressure. Keeps **** out of the drives, etc. Computers are always clean inside. No dust bunnies. I have never checked the temps though to see if there is a difference. Anybody checked this?

[hawkeye177]

I have a question. How much does it cost to round your cables. I think it cost me about 35cents of tape. what did you use gold.

[Hans Svetty]

He bought fans, so that cost a few extra bucks.

hans

[araaraara]

I ripped two right size fans out of a pair of power supplies. They work great!

[robapacl]

The thermal discussions are interesting and a number of replies talked about increasing air flow and decreasing CPU temp. Has anyone actually measured heat sink base temp? You could blow a tornado through the pc and still cook the CPU if there's much thermal resistance between CPU and heat sink, caused by a warped, dirty, or rough surface, or a poor clamp. I did a lot of thermal design for a lot of different types of circuits and found out that you can't ignore any of the thermal resistances. If there's a big difference between CPU and heat sink base temperatures, forget about the rest of the cooling. I used tiny ( pim head size ) thermistors ( for low thermal mass ) with long, fine wire leads ( for high thermal resistance ), clamped to the base with BeO ( beryllium oxide ) grease to help decrease thermal resistance. BeO has the thermal conductivity of aluminum but is an electrical insulator, a big advantage over electrically conductive metal compunds which sometimes migrate into sensitive circuit connections. Bob Pacl

[silverfish51]

I tried for ages to get the right combination of fans to keep my PIII cool. I now run 2 PCI bay coolers (one of which, to cool my GeForce 2) an ex power supply fan as a front case fan, bog standard intel PIII box heatsink and fan and of course the pwr supply fan. It runs at 31C at it's hottest inside the case at the CPU (28C when idle). I also cut away all the metal grills and plastic retainers that blocked the air flow at the front of the case as well as drilling 6 holes in the CD and floppy blanking plates.

Oh, that's running negative pressure inside the case by the way. No dust problems so far.

Not too sure about the temp difference between the 1gig and PIII chips, but 61 to 46 is some drop, congrats http://www.sysopt.com/forum/smile.gif

[This message has been edited by silverfish51 (edited 06-20-2001).]

[acid_burn~187]

I didn't cost me anything to round my cables, just the cost of tape and ground wires. and my moto is, more fans the better. The fan in the back of my case was taking out of a PSU from a case that had a dual K5. It is awesoem!! But woulnt' fit... it's held in place with 1 screw and duct tape. http://www.sysopt.com/forum/smile.gif

it's not going anywhere.

~Paul