Well, I can't warrant the accuracy of my temps... I mean, I use the built-in thermosistor on my KT7A with VIA Hardware Monitor, so I know I'm asking for it... but at least I can compare my previous inaccurate readings to my new inaccurate readings...
Old:
AMD's retail hsf, which is an aluminum deal plus a Delta EFB0512HA -- 50mm, 5500rpm, 11.3cfm, 30 dba
by default, mounted for intake
New:
"OCZ Gladiator w/DELTA FAN"
I gather this fan is the same as the "black label":
Delta AFB0612EH -- 60mm, 6800rpm, 38cfm, 46.5 dba
came mounted in the intake position
Bought from the OCZ Store along with a copper spacer which had the cutouts all wrong, so I've got to return that now. It took me a few tries to figure out the clip on this thing. The fan is noisy indeed, I'm either gonna get a rheostat or failing that, a quieter 60mm fan.
Both heatsinks were tested under similar conditions (ambient temp, cpu load, multiplier, etc). A retail Duron 800 running at 1000/133. CPU seems to top out ~1050 above which Windows crashes immediately. Same Arctic Silver II thermal paste. Same midtower case with minimal airflow--just the weakly P/S exhaust and an Antec 80mm exhaust fan. I guess you could count the really tiny intake fan on the VIA northbridge, too, with its very suspect steel heatsink--my next project. FSBs more than +2 above 133 are possible but not as stable as I'd like. Either I need new RAM (current is Kingmax PC133) or gotta work on the northbridge.
I didn't realize the thermal compound made such a big difference, but it apparently affects my cpu temps by 6-7 degrees. The Gladiator came with some yellow gunk on it, which I didn't like but the guy at Overclockerz assured me it comes off easy with nail polish remover. First I tried using the heatsink with pre-installed gunk--my load temps with the old hsf were 51-54, now they were 46-49. Not too impressive. So I used some adhesive remover from the hardware store and sort of polished the yellow stuff out with an alcohol swab. Applied the Arctic Silver, and now my load temps are around 40-42.
So, bottom line is that I got a rough 10C drop in CPU temp with using the Gladiator instead of the stock hsf. I'm not sure whether this is mostly due to the Delta fan or the OCZ heatsink, but my money's on the fan, cuz my system temp in VIAHM is a couple degrees lower now, too. I'm noticing that the OCZ copper heatsink isn't nearly as hot to the touch as my old aluminum was under full load; I guess that could be due to the Delta fan as well. But it's also likely that the OCZ is just not the best copper heatsink out there. The finish on the bottom didn't wow me. It'll be all right for my Duron but my next rig is gonna be water-cooled.
I do have that Delta plugged into a 3pin fan header, which my KT7A seems to be handling fine (though there's only 1 other serious fan connected to the mainboard). I think I will get a 3-to-4pin adapter, however, once I address the rheostat issue.