My Taisol CGK742092 on Asus CUSL2

[zeknight]

I've a PIII 700@933 at 1.80v. Received the Taisol CGK742 yesterday and replaced the golden orb with it.
Temperature readings using Asus Probe 2.12.05, BIOS 1004.003 beta.
Room temperature approximately 23-24C.
Case is open.
Motherboard: 28C

Golden Orb with artic silver:
Load: 48-50C

Taisol CGK742 with artic silver:
Load: 45-47C

I'm not concern with idle temperatures as RC5 is running 24/7.
Hmm, not sure how accurate these readings are, but somehow, I kinda of expected better. I did not lap the heatsink, but I cleaned the thermal pad off with vegetable oil.

 

[thermite88]

I have almost the identical setup as yours, except the HSF. The Asus CUSL2 BIOS is 1005.001. I happened to measure the CPU at the same room and MB temperature as yours. The case is an Addtronics 7890A with 7 fans. The temperature readings are the same using Asus Probe 2.12.05 or MBM 5.11.

The load condition is running Prime95 loop until the temperatures are stable for 10 minutes or longer.

Golden Orb with Artic Silver:
1.7 vcore: 29C idle, 38C full load
1.9 vcore: 29C idle, 42C full load

Alpha PALFC-35t with Artic Silver:
1.7 vcore: 29C idle, 34C full load
1.9 vcore: 29C idle, 41C full load

It is very important to get the HSF completely level with the CPU. You can check the Artic Silver pattern after removing the HSF.

 

[Losty]

why are those temps like the amd sockets? shouldn't pIII's run 5C cooler?

 

[Mikewarrior2]

P3s should run lower, but that's just another example of bad socket A readings. My p3@982, 1.8V runs at 38C, Taisol CEK733(lapped). case temp right now is 19C.

Zedknight,

One potential problem with the taisol is an unsmooth surface. They don't necesarily lap it because the PCTC-pad is fairly thick, and it is heatfused, and by default fills any imperfections in the heatsink. I noticed this problem when I got mine, but havne't had a chance to test it yet because I haven't lapped the heatsink yet.


Mike

 

[Nerdwannabe]

Thermistor from your motherboard is not a very precise sensor. We found the thermistor reading can be off as big as 30%. The 30% is not from sensor to sensor, but the same sensor's reading can constantly be of by different percentage.

The only real way to make an accurate measurement of the temp is to use a thermal couple that makes a contact to actual CPU's die.
You will have to drill a very tiny hole on the heatsink to allow the thermal couple to reach the center of the CPU die.

Don't be surprise about your reading because the temp reading will not be very accurate.

 

[Mikewarrior2]

Nerdwannabe,

He's using a p3, with internal diode readings, on a mb that supports internal diode readings.

While the diode isn't "calibrated", it does a much better job for comparisons than a thermistor based solution.


MIke

 

[zeknight]

Thanks for the replies. I agree the surface of the taisol isn't the smoothest thing around, and I'll probably lap it when I've the time.

 

[thermite88]

zeknight,

Your Golden Orb temperatures are also about 10 degrees C higher than typical. It may be more than just the heatsink surface. Be careful about your setup to avoid damaging the CPU.