Help me get a 5c Temp Drop!!!

Stilletto said:

Ok, I know there is a weak spot in my loop somewhere and it is holding back my OC's. All I am asking for is a 5c temp drop.

Current setup:

MCC655-B Pump
XSPC Single Bay resevoir
Apogee GT Waterblock
Black Ice pro 2 Radiator with approx 180CFM going through it.


I am getting a bit too high on load temps and want to drop about 5C

Suggestions? Would a DTEC Waterblock help?

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Stilletto said:

...asking for is a 5c temp drop.

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Stilletto said:

Well, at Idle at Stock Speeds ([email protected] 1.18V) I am getting Idle about 30-31C Load about 39C. OC'ed to 3.52 @1.46V I am getting about 43C Idle and 63C Load. You probably see that I haven't maxed out the CPU or MB by no means, but the cooling is letting me down. My ambient temps are at best 22C, at time perhaps 23 or 24 when the room heats up )

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Jas said:

Chekc your Radiator too, it migh tneed a good cleaning. If it is clogged up wiht Dust, animal hair, etc, that will raise your temps as well.

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Stilletto said:

It's brand new

I used to have a heater core and got the exact same temps.
I wonder if a triple radiator would actually be any better....seems that every rad I have tried pretty much blows cold air (unless the temps get to 62C+, in which case I can really feel the heat coming out). I have tried applying AS5 just about every which way possible.

The block mounts to the CPU over 4 studs with springs and topped off with an acorn nut for tightening. I can tighten it pretty good, but after a year or so I wonder if the tension is not enough? Seems like I should be able to tighten a bit more, but the acorn nut is all the way on.

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thideras said:

Actually, that is the b2 stepping core. That is the same temps that I get with my U120E or my old watercooling setup.

The B2 core clocked bad with horrible temps.

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SStrokerAce said:

I've done some ACTUAL sufrace finish measurements with a profilometer and lapping doesn't do too much to copper surfaces in terms of surface finish improvements over OEM Swiftech finish.

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QuietIce said:

Have you added the 3mm o-ring for bowing ...?

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Swiftech Website said:

During the course of our live CPU testing, we uncovered the fact that the overall performance of the Apogee GT water-block could greatly benefit (by up to 0.03°C/W) by artificially inducing a bow i.e. a convex shape, in the water-block base plate.

In CPU's where the geometrical center of the Integrated Heat Spreader (IHS) coincides with the geometrical center of the water-block base plate, an artificially induced bow in the water-block base plate increases the contact pressure at the geometrical center of the IHS and can be further qualified as a pressure gradient applied to the entire surface of the CPU IHS with a maximum pressure value at its geometrical center. The observable result is an improvement in the thermal joint between the CPU IHS and the waterblock base plate in the general area directly above the CPU die(s), while the water-block thermal resistance remains approximately the same.

The following graph shows the actual difference in thermal resistance between the Apogee GT with a flat base plate (as shipped) and the Apogee GT with a bow artificially induced by replacing the original 2.6mm wide o-ring with a 3mm wide o-ring. Between .5 and 2 GPM a difference is observed that is never lower than 0.02 °C/W.

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