temperature probe

[ILikeMy240sx]

I have an Enermax Thermal Control and I want to stick a temp probe between my MCW5002 and the heatsink... would this affect any performance at all?

[Soja]

What heatsink?

[ILikeMy240sx]

ooops... long nite stupid calc... i meant MCW5002 and the CPU.. what was i thinking??

[Soja]

So you mean place it on top of the cpu core itself?

[ILikeMy240sx]

I want to stick the probe between IHS and MCW5002.

[Soja]

Won't that prevent correct contact of the WB and cpu? Also I think you'd have to insulate the side of the probe touching the WB to prevent it from reading block temps instead of cpu temps.

[ILikeMy240sx]

Yea thats what I was worried about... so how would i stick a probe there to monitor the CPU temp??

[Soja]

Usually people place it so it touches the sides of the core. I'd definitely insulate it somehow to prevent it from touching the wb.

[BaD CrC]

Lol, don't do this noob mistake of placing the temp probe ON the CPU/GPU. I did that some time ago (I wasn't reading the forums) and my beautiful XP2000+ was vaporized in less than 2 seconds.
Always place the probe touching one SIDE of the die. Don't put anything between the die and your block but thermal paste!!

[ILikeMy240sx]

Originally posted by BaD CrC
Lol, don't do this noob mistake of placing the temp probe ON the CPU/GPU. I did that some time ago (I wasn't reading the forums) and my beautiful XP2000+ was vaporized in less than 2 seconds.
Always place the probe touching one SIDE of the die. Don't put anything between the die and your block but thermal paste!!

oo damn... good thing i posted it here... Now i have to go figure out a way to make it touch the side.... any ideas?

[Fuzion]

I used a little thermal tape cut to fit my probe, and then slapped it on the side. I have a P4 w/ the heat spreader, but it should still work the same.

[ILikeMy240sx]

Originally posted by Fuzion
I used a little thermal tape cut to fit my probe, and then slapped it on the side. I have a P4 w/ the heat spreader, but it should still work the same.

so... your probe/thermal tape is no where between the WB and IHS? thats cool. Im sorry but im not understanding you clearly...

[Juiblex79]

I have a related question. I have a temp probe that came with my water cooling system but I also have the onboard temp that I get from the bois monitering. I have the probe between the waterblock and the side of the die. The bios temp reading is about 10C higher then the probes readings. The probe seems to be accurate because when i trurn the system on it regesters the correct room temperature. I just want to know which is more accurate? I have heard that bios temps can read a little on the high side in water cooling systems because there is no air flow around the die. What would be the best way to get an accurate reading?

Edit:
Forgot to add my system:
2x 1700+ @ (1875Mhz for the time being)
MSI K7D Master
2x 512Mb Samsung EEC Registered DDRAM
Koolance Exos Water cooling(Yeah could be better but I wanted something simple to start with)

[ILikeMy240sx]

Originally posted by Juiblex79
I have a related question. I have a temp probe that came with my water cooling system but I also have the onboard temp that I get from the bois monitering. I have the probe between the waterblock and the side of the die. The bios temp reading is about 10C higher then the probes readings. The probe seems to be accurate because when i trurn the system on it regesters the correct room temperature. I just want to know which is more accurate? I have heard that bios temps can read a little on the high side in water cooling systems because there is no air flow around the die. What would be the best way to get an accurate reading?

What kind of MOBO do you have because I heard Abit boards give you a ActualTemp+10 as the temperature reading... Correct me if Im wrong

[Juiblex79]

Updated my post has my system listed on it now

[ILikeMy240sx]

The lower temp might be due to the fact that its touching the WB...

[Fuzion]

so... your probe/thermal tape is no where between the WB and IHS? thats cool. Im sorry but im not understanding you clearly...

Nope, on a P4 you have a heat spreader that is almost the size of the chip. My probe is located right on the side of heat spreader, I had to modify the probe just a little, but it works great. I tried the "in between HS" thing, and it caused tons of trouble. with you having an AMD, you could tape the thermal probe right beside the Die, the HSF shouldn't touch it and it would give good readings.

[Juiblex79]

Should I just ditch the probe and use the bois? Or would an insulated probe give a better reading?

[K1ll1nT1m3]

I have done a small trick to mine. I cut off the heatspreader and epoxied the sensor between the cpu die and the heatspreader, right next to the cpu heatsink. Sorry, I dont have better pic of it.

http://www.theforumisdown.com/uploadfiles/0103/WaterBlock.JPG

I took the heatspreader off the die. Then, with just a bit of AS3 epoxy, I stuck a flat sensor next to the cpus heatsink on the die. I then made sure there was enough clearence between the sensor and the heatspreader ( i had to grind a small groove in the bottom of the heatspreader ). I then put the P4 in an old 478 socket so I could clamp it back together with out bending the pins. I mixed up a bunch of AS3 epoxy and filled the whole space under the heatspreader, and lightly clamped it back together.

I couldnt think of a better way to get a sensor any closer. I tried it on a dead P4 first just to be safe. Its been working great for over 6 months now. I can see even the smallest temp changes now, like opening IE, that makes a 3c increase for about a secound. Plus, the AS3 helps spread heat across the heatspreader, instead of just having dead air space.

Since your using a AMD, I would think this would be pretty easy. Unless your using a spacer of some sort.

[Juiblex79]

Yeah i think i am just going to use some electrical tape to isolate the waterblock from the probe and keep the probe right where it is next to the die and maybe add some thermal paste too. Thanks for the input. :)

[ILikeMy240sx]

Where did people get the idea that I have an AMD?? haha... Newwayz... Im dont have the balls to take the IHS off the cpu and play around with it. I so wish I could do it but my hands will start to shake terribly and BOOM ill stick something in the core or something. I think ill just stick the probe right on the side of IHS...

[K1ll1nT1m3]

I hear you. I had to try it first on a dead cpu to be safe. I think having a sensor close is good idea. I dont trust BIOS. I have seen the temp change too many times by just flashing the BIOS.

I talked about the AMD since there were a few in this thread. I posted this for P4s though. Whatever cpu it is, just dont stick a sensor in the contact area. ( i have seen it done ) If anything, lap the heatspreader and the block ( p4 ). The heatspreader is really pretty thick ( .05in, almost 1/16th in ), some 600 grit would take a little while to cut through it. I just rinse my P4 in alcohol aftwards and let it dry for a few minutes. I have lapped my P4 about 6 times now. So once shouldnt hurt anything.

[Soja]

6 times? Did you do it right the first time :p?

[K1ll1nT1m3]

no