is 48C a safe (normal) temp for a P3 700E?

[abracadabra1]

they should be able to stand much more than that...but i would tone it down if it hits 50C

 

[Sunny129]

hey guys, well i left my computer alone since about 7:00 last night, and just got back to it now. i left SETI@home running, and when i came back just now, i noticed the CPU temp was @ 41C, so i'm assuming its been that way for hours. i guess its just inconsistant, and thats the way its going to be...but 41C is good.

 

[thermite88]

Sunny129, you have done a wonderful job getting the Gorb to work as well as it possibly can in your setup.

I compared the Golden Orb, Chrome Orb and Alpha FCPGA-35t on a P3-700 overclocked to 933 MHz @ 133 FSB at 1.75 volts vcore. The limit of my CPU is 1.0 GHz @ 143 FSB at 1.9 volts vcore. The Coppermine is such an efficient design, all of them provide sufficient cooling with a large margin to the Intel ultimate spec. Using the Alpha FCPGA-35t and ArticSilver, the CPU never went more than 10C (18F) above case/MB temperature running Prime95 loop.

I use an Addtronics 7890A case with 6 case fans and the Enermax dual fan 451W PS. The case is well ventilated by carefully balancing the intake and exhaust fans. In a 22C room,

Case (thermister in middle of case) 23C
MB (Asus CUSL2 onboard sensor) 28C
CPU idle (on die thermal diode) 31-33C
CPU full loads (on die thermal diode) 38C

When I switch the heatsink from Alpha to Golden Orb, the idle CPU temperature change only 1 degree C or so. At full loads, the CPU is higher by about 4C. Both the Alpha and Gorb are more than adequate for the coppermines, and the Gorb is definitely a better deal for the money.

 

[Sunny129]

its good to know that i'm doing a good job cooling my system. i know i'm a few degrees above the people who have bigger cases and more fans, but i'm glad to hear i'm doing well with a mid-tower and only two case fans. my purpose in these forums is to find out from people who know their computer stuff if i'm getting the right temps amongst other things. thanks for your info and specs thermite88

 

[Sunny129]

i just noticed something about one of the readings in ASUS PC Probe. the 2nd temp on the list is the mobo temp. i'm assuming that they mean the temperature of the chipset, right? is this going to be much different than the ambient case temp? and if so, i've been reporting the chipset temp as my case temp, so i might have been wrong. is there any software that will measure the case temp, b/c i dont think pc probe does?

 

[Mikewarrior2]

mb temp is an om mb thermistor near the i815E chipset. A bit warmer than ambient case temp, for a chipset like the i815.


Mike

 

[Sunny129]

what kind of intrument do you use to measure ambient case temp? i know i need hardware as well as software to run in, but i dont think any bundled hardware/software comes w/ the CUSL2 that will measure the case temp.

and also, when people say that both raising the clock speed and/or increasing the Vcore will shorten the life of a CPU. is this due to the wear and tear of the electricity flowing to the CPU, or is it the heat that wears out a CPU?

 

[Mikewarrior2]

You can either go with an external radio shack indoor/outdoor thermometer(and measure 1 inch away from the heatsink fan intake), or the cusl2 has an additional header for a thermistor cable. Asus no longer includes one, but I had one leftover from an old mb. Now, my only real question is whether the header is that accurate. I'm gonna try to pick up a radio shack thermometer today to compare.


Mike

 

[Sunny129]

cool...well let me know what your results are. i would like to get a an instrument to record an accurate case temp. and when you say to measure the temp 1 inch away from the heastsink fan intake, do you mean one inch above the Gorb?

 

[Mikewarrior2]

yeah, one inch above the fan(or in front in the case of a slotket).

Didn't get a chance to grab it today.


Mike

 

[Sunny129]

if you ever get around to buying a thermometer and comparing its accuracy to the thermistor, dont hesitate to post your results here, or let me know if you start a thread on it or something...thanks

 

[Mikewarrior2]

Will do. My guess is that since the external thermistor is just a thermistor with some wires, i doubt the mb does anything to this reading... But who know's?


Mike

 

[thermite88]

I have a thermister that I purchased from Carter Buck two years ago. I also have one that came with the MSI 6163 MB and two home made using Radio Shack thermisters. All of them work about the same and agree with a Radio Shack digital thermometer (Cat No. 63-1021) within a degree.

The MB temperature on Asus CUSL2 is usually a few degree C above the case temperature if your CPU fan blows onto the heat sink. It will be much closer to case temperature if the CPU fan sucks.

I use a thermister connect to the MB header to measure the case temperature. The thermister itself is position in an open area. The case temperature is usually 1-2 degrees C higher than the room temperature in my setup.

I used to have more case fans than I do now. I took the fans out one at a time while monitoring the case and MB temperatures. It any case fan does not significantly affect the temperatures, it is gone for good.

 

[Sunny129]

hey, thanks again for all the info thermite...by the way, does anyone know if the air flow on a Gorb can be reversed? i know the heatsink and fan are separate componente, but i'm not sure if they can be separated...

 

[thermite88]

sunny129 wrote:

<< does anyone know if the air flow on a Gorb can be reversed? >>

Most CPU fans are 12 volts DC fans. In theory, the rotation can be easily reversed by reversing the power supply wires. However, I would recommend against it.

In most fan, the fan blades are dssigned to work efficiently in one direction only. Reversing it will greatly reduce the CFM. The better way of reversing a fan is to physically flip it over.

The old Gorb fan has a plastic frame which is glued to the heat sink. The newer Gorb fan is held to the heat sink by two screws. Both can be separated easily, but there is no easy way to mount it in reverse direction.