Tec + Hsf

[Sonny]

Who of you guys have done it? How do you compute for the peltiers wattage? What are your temps?

[Sonny]

c'mon guys, give a little help here

[KILLorBE]

I've done it and so did Donny_paycheck.
You can use a Prog called TECcalc (see attachment).
I believe Kryotherm also has a prog, but their site is under construction.

Scan the file!! cuz I need to install a virus scanner (I did scan my HD's two days ago).But you can never be sure.

[Sonny]

Which HSF did you guys use & did you have to mod them for a cold plate or is there a version that has this option.

[KILLorBE]

I used a PEP66 with a home made cold plate (3/8 Inch...0.93 cm?) and a 62Watt peltier (for now, gonna order a 80watt Kryotherm ICE-71 but the shop is closed till 5 January), and I had to modify it a bit (drill some holes and tap them).
I must say that I'm running a PIII600@888 2.0 CV, but donny has a XP...I believe(not sure which one).
Max temp is about 25C F@H 24/7.

**EDIT** I believe donny has a XP1800 (1566MHz?....sorry I'm not a AMD guy).
And AFAIK there are no HSF's that are made for using a TEC (there are some PEP66's that come with a TEC (I believe they're called PEPTEC), but I also believe that they're discontinued).

**EDIT 2** Some ppl glue the TEC onto the HS and cold plate, but I don't recommend that, cuz if you want to change the TEC you need to lap the HS and cold plate, also TEC's like (perform better under) pressure most of them can handle 25 Kg.(or more) per square cm.

[Sonny]

Thanks Man:beer: I saw a MC?370 with a cold plate & TEC at Swiftech. I saw that donny_paycheck was using a MCX462 with a 80w pelt & was hoping to find one of those. I really don't need to go with a high wattage pelt to avoid condensation but something to keep my CPU with in 3°C of room temp with the AC shut.

[KILLorBE]

I just PM'ed donny to have a look here (noticed he was online), and both of you seem to be online:p .

And your welcome, that's why we're here to help each other...right.

[Sonny]

Thanks again:beer: Do you guys have problems with condensation?

[KILLorBE]

As long as I'm running F@H @888 2.05V I don't have condensation problems, but I did try to run my CPU @ 396 (6x66MHz 2.05V) and F@H but within 12 hours (don't know exactly how long cuz I fell asleep:p ) there were hanging huge drops on my cold plate, I did make sure nothing could go wrong tho (TP on my V-card:D ).

But when I let my system idle temps drop way below 15C, Which will cause condensation problems, I don't know the exact temps when condensation will occur, but I believe its something like a 10C difference between ambient and cold plate.

[flounder43]

donny_paycheck posted some pics and info in this thread. Good info...

http://forums.overclockers.ws/vb/showthread.php?s=&threadid=53051&highlight=hidden+dangers+peltier

[The Overclocker]

i have seen swiftecs beings sold dircet from swiftech with tecs on. they may no do them now

[donny_paycheck]

It's in my sig, but I used a Swiftech MCX462 with the low-range 68CFM 80mm Delta fan to cool the hot side. The 80w TEC I got from 3dcool but it's gonna be the same elsewhere. Below that is a 40x40mm cold plate about 8 or 9mm thick. The heat sink didn't need lapping cuz Swiftech does a pretty good job of it themselves after they machine it. The cold plate was mirror-smooth when I got it so I let laziness keep me from lapping it. I used AS2 between the pieces. The spring-tensioned bolts that came with the MCX462 to mount it to the board were just barely long enough (2" long, 6/32 thread) so I got 2 1/2" bolts just to make sure I didn't crack the core from over tensioning them. For insulation I went on the heavy side but I was afraid of condensation. I used neoprene rubber foam and a bunch of RTV silicone to hold it together. I filled the socket pinholes with dielectric silicone compound. The one thing that I almost screwed up doing was putting too much neoprene in the center of the socket. It kept the CPU from sitting in the socket correctly and had I not caught it before final assembly I would've had to rip it all apart again, not to mention I might've wrecked my CPU. Here are my temps:

Athlon XP 1800+(1533)@1800mhz(12x150), 1.75vcore
Idle in CMOS: -2C
Full load in win xp, Prime95 for 15 minutes: 11C

The temperature was measured with a digidoc 5 thermocouple that I stuck into a hole I drilled in the corner of the cold plate. I also have a sensor in the HS itself that I watch once in a while but it's usually only around 30C max. Here are the pics I took of it with the MC462. I put the MCX462 on it the next day:

[donny_paycheck]

It's in my sig, but I used a Swiftech MCX462 with the low-range 68CFM 80mm Delta fan to cool the hot side. The 80w TEC I got from 3dcool but it's gonna be the same elsewhere. Below that is a 40x40mm cold plate about 8 or 9mm thick. The heat sink didn't need lapping cuz Swiftech does a pretty good job of it themselves after they machine it. The cold plate was mirror-smooth when I got it so I let laziness keep me from lapping it. I used AS2 between the pieces. The spring-tensioned bolts that came with the MCX462 to mount it to the board were just barely long enough (2" long, 6/32 thread) so I got 2 1/2" bolts just to make sure I didn't crack the core from over tensioning them. For insulation I went on the heavy side but I was afraid of condensation. I used neoprene rubber foam and a bunch of RTV silicone to hold it together. I filled the socket pinholes with dielectric silicone compound. The one thing that I almost screwed up doing was putting too much neoprene in the center of the socket. It kept the CPU from sitting in the socket correctly and had I not caught it before final assembly I would've had to rip it all apart again, not to mention I might've wrecked my CPU. Here are my temps:

Athlon XP 1800+(1533)@1800mhz(12x150), 1.75vcore
Idle in CMOS: 4C
Full load in win xp, Prime95 for 15 minutes: 12C

The temperature was measured with a digidoc 5 thermocouple that I stuck into a hole I drilled in the corner of the cold plate. I also have a sensor in the HS itself that I watch once in a while but it's usually only around 30C max. Here are the pics I took of it with the MC462. I put the MCX462 on it the next day:

[donny_paycheck]

Here's how I insulated it. I used varying thicknesses of foam:

[Sonny]

donny_paycheck - Thanks for your time Man:beer: Dont the peltiers+HS need more clamping pressure compared to the CPU+HSF? What are you cooling here?

[donny_paycheck]

Originally posted by sonny
donny_paycheck - Thanks for your time Man:beer: Dont the peltiers+HS need more clamping pressure compared to the CPU+HSF? What are you cooling here?

I had an extra RAM heatsink from a thermaltake kit that I affixed to the voltage regulators with AS thermal epoxy just for sh!ts and giggles.

[Sonny]

LOL!!!!!!!!!! So about the clamping differences of the TEC & CPU.....

[donny_paycheck]

Originally posted by sonny
LOL!!!!!!!!!! So about the clamping differences of the TEC & CPU.....

Oh yeah, I forgot. I used bolts 1/2" longer but the thickness of the TEC and cold plate made up the difference. The pressure is maintained by the springs so the bolts don't have to be tight on, they just have to grab a little. As for pressure, I've never heard of anything special for peltier setups. All I can say is that this thing works awesome so there's no reason for me to worry about it.

[Sonny]

Thanks again:beer: I think one of the articles at tips section of Overclockers mentioned that a peltier & cold plate needs something like 4 X the pressure of the CPU & HSF but if it works it works:beer: