Measured temperatures (data collection)

[freecableguy]

I got myself an IR digital thermometer and a digital sensing unit from RadioShack today. A little expensive but I like my new toys. Anyway, I decided I wanted to collect a little temperature data for my system so here it is (rounded to nearest degree Celsius):

Ambient: 24C

Idle Values
Case/Radiator Intake: 27C
Waterblock (hot side): 31C
CPU diode: -12C
PWM: 12C (you can see that the TEC is cooling the board which is in turn cooling the power MOSFETS and other components in the area...nice)
Water (inlet to pump/outlet from waterblock): 31C
Radiator Exhaust: 28C
NB: 28C
DDR Modules: 30C

Full load Values
Case/Radiator Intake: 29C
Waterblock (hot side): 32C
CPU diode: 15C
PWM: 25C
Water (inlet to pump/outlet from waterblock): 32C
Radiator Exhaust: 30C
NB: 29C
DDR Modules: 34C

Delta - Idle to Full Load
Case/Radiator Intake: +2C
Waterblock (hot side): +1C
CPU diode: +27C
PWM: +13C
Water (inlet to pump/outlet from waterblock): +1C
Radiator Exhaust: +2C
NB: +1C
DDR Modules: +4C

Delta - Ambient to Idle
Case/Radiator Intake: +3C
Waterblock (hot side): +7C
CPU diode: -36C
PWM: -12C
Water (inlet to pump/outlet from waterblock): +7C
Radiator Exhaust: +4C
NB: +4C
DDR Modules: +6C

Delta - Ambient to Full Load
Case/Radiator Intake: +5C
Waterblock (hot side): +8C
CPU diode: -9C
PWM: +1C
Water (inlet to pump/outlet from waterblock): +8C
Radiator Exhaust: +6C
NB: +5C
DDR Modules: +10C


What I have learned. The watercooling I have is more than enough to handle the load. Changes of +1C and radiator exhaust changes of +2C tell me that the system is VERY capable of removing the heat load. The large delta for the CPU from idle to full load is normal for a TEC setup...I just wish that Swiftech made this unit with a 360W version...I might be able to realize 10C lower full load temps with the processor.

Other than that there is nothing I can do to improve this setup. More flow or air across the radiator will not help. I suppose getting a 120.3 Thermochill MAY decrease my water temps by 2-3C but that will most likely do very little to my CPU temperatures since the change from -12C to 15C occurs during a change of water temperature of only 1C total.

I think I may graph so that it is easier to visualize...

-Kris

[saaya]

very nice! ad thx a lot for sharing! :toast:

i think a 360W tec will get you to around 0C cpu temps. the jump from 227W to 360W is bigger i think.

i think your close to producing just as many watts as the 227W tec can remove (150-175W depends on the manufacturer).

with 16x250 and 1.8v your around 150W and the tec probably removes around 175W. i dont know how much heat a 360W tec can pump, but i think its around 280W, so its a nice jump from the 180W your current tec can pump.

i think a 360W tec would be def worth a try, your radiator seems to be powerfull enough for an extra 300W of heat the 360W tec would add.

atm your only cooling the cpu tec with that loop, right?

[freecableguy]

Yeah...only cooling the CPU. That was the plan as I was not sure if the loop could handle it in the first place. But I have a STRONG pump and a lot of airflow available (I adjust a pot to vary the speed from quiet to rediculously loud). On thing though, I am not at 1.8V....I am running at 1.5V! (Great ES chip here). I agree in that I could get lower temperatures but I think I am done building with this system (except for the extra GB of BH-5 I just bought...hehe) and will probably leave it just like it is until the next round of "F" chips come around...I will be looking for a 3.73EE or higher and most likely the 925XE chipset. Then again I may skip a generation...nothing seems to be as good as the old 875 chipset....yet....

-Kris

[saaya]

only 1.5v? :eek:

then its only... 100W of heat!!! then your 227W tec is not a "real" 227W tec but one of those "claimed" 227W tecs.

it cant remove more than 120W then if it gives you those high temps under load then compared to idle.

my 227W tec can remove 175W of heat, but its a 50x50mm one... well think about it kris, its worth a try, and switching tecs is not THAT much of work. :)

hmmm maybe try a real 227W tec like mine? only a little more heat but it can pump a lot more heat and should give you way better load temps. and you dont need a new psu to power it like you would need for thr 360W tec!

[freecableguy]

The TEC I have came installed in the Swiftech unit. Show me where you these "real" 227W TECs are then...

I computer my CPU power to be about 135W. And I am running my TEC at 15.2V so it should be removing 226W of heat...which means...

dT = (1 - (135/226))*67 = 26C (rounded)

So for a hot leg temperature of 32C I should be seeing full load temps of 6C. Yep, I agree...my temps seem a little high but I always just figured these were due to inefficiencies. Remember too though, if I am going to replace the TEC it must be the right size to fit my Swiftech block.

[saaya]

have you read my reply to this? ^^

i dont want to type it all again :D