You have a ThermoEngine right now, huh? I doubt either one of those will improve on it; it was the best heatsink you could buy for ages and now it's still a pretty good performer.
Most of the cheaper Cooler Master heatsinks are pretty mediocre. I just did a build using the DP5-6H51 and actually found the noise level pretty offensive for a low-output fan. Cooling was ok though; still not up to ThermoEngine levels (have one in a PC here).
What I have done is get an 80>>>60mm fan adapter and put low noise 80mm fan (Evercool) on this ThermoEngine. It holds this Duron 800@1045MHz (1.85V) under 42C most of the time.
I had the ThermoEngine on it until about 30 minutes ago. I thought I'd try one more time to get my Dragon Orb 3 back on, and I managed it (that clip is a real bear!). My temp is now running at 41-43C, but it sounds like a jet engine (it's the 7000rpm model).
I do remember before when I used it, if I ran the power off of the motherboard, instead of using the 4 pin convertor, the sound was a bit quieter. The only reason I didn't this time is because the manufacturer recommends running it off the 4 pin convertor as it may damage the fan sensor on the motherboard. I've read this elsewhere too, although the one place I saw it mentioned also said that they have not received nor read of any reports of this actually happening. I'm about ~~> <~~ this close to running off the 3 pin on the mb just to lose a little bit of the noise. <VBG>
I loved your idea of modifying the ThermoEngine with a larger fan. I'll definitely look into that one. Where did you get your 60 to 80 mm convertor?
I have the 7H53F model. 70x70 fan rated at 4300RPM. Now running XP1600+@1800+, 38-48C (78F in this room in the afternoon). Bios and extra utility shows it running average 4700RPM, connected to fan header.
Question: When I had this on K7T Turbo (plain) w/950@1100 Duron was quiet as heck. Now have it on K7T Turbo2 w/o-c 1800+ and seems a lot louder. One difference in the setup is I'm using square 12v plug for CPU power. Could this be overvolting the fan and making it louder?
Also, I have a Sparkle PS with (I think) a temp controlled fan. Could this be cranking harder/louder to compensate for the XP chip and temps? My voltages seem excellent.
How close is the case side to the top of the fan? If it is fairly close you will get an increase in RPM. Same thing happens if you put your hand over the top of a fan; you get negative air pressure between your hand and the fan causing it to "cavitate" slightly.
I decided against the Coolmaster, and I'm sticking with my ThermoEngine for now.
I just ordered two Duron 1.2's for 2 of our machines (hubby needed an upgrade too, and the price of the 2 1.2 Durons was about equal to one of the Athlon XP's I was looking at). I'm hoping the Durons run a bit cooler than my old 1.1 ghz Thunderbird. I know that the two Durons we have now (a 750 and an 800) both run MUCH cooler than the T-Bird, but with the slower speed, that stands to reason. I'm not sure how hot the newer Durons run, but I would tend to guess at least a *little* cooler than the T-Bird.
The bad news is that the T-Bird finally up and died last night. It had been running overly hot (around 57-60C) for the last week or two, no matter what heatsink/fan I tried on it (and yes, I used heatsink compound and was very careful with each install). The T-Bird never used to run that hot, and I noticed the big jump in temps even before I started trying different heatsink/fans on it. Maybe all of the fussing with it contributed to its downfall, or maybe it was already on its way out anyway. I don't know. I did put a Duron 750 in my system for the meantime, until the new CPUs arrive.