Actually I used an Accelero S1 on my old card with the heatsink adhesive they included. I also thought that the adhesive wouldn't be that good but after about two years when removing the heatsinks I noticed they were glued on pretty damn tight, I had to warm them with an soldering iron and twist hard to get them off. It took me about two or three hours to clean up all the adhesive stains on the chips even though I used rubbing alcohol. The end result still wasn't perfect, the markings on some of the chips even faded somewhat.
Huh. I guess today is going to take longer than I thought. :-/ I just guessed they'd be really easy to clean up because I've had three fall off. I've got the ArctiClean stuff; the second bottle is just alcohol, but the first is some kind of magic on thermal compound; might work.
The VRMs have mounting holes above and below they're intended to use a spring mount sink, but I don't have a narrow heatsink with the right holes lying around. Maybe it wouldn't be hard to fabricate one.
My uneducated guess is that I could run forever with two low/mid RPM fans zip-tied on the stock heatsink. I'm not optimistic about long-term overclocking. If the heatsink isn't getting enough air to keep the GPU below stock, I'm skeptical the (unmeasured) VRMs are either. Maybe I should hack together a temperature probe. In any case I don't think passive operation is plausible with the stock heatsink; from what I hear the RAM may start to have problems without airflow or heatsinks.
One puzzling thing: I can't undervolt it in SmartDoctor. I'm using 5.74, which appears to be the latest version.
The voltage slider is enabled, and appears to allow higher-than-stock settings. The lower limit is 1.157, however.
Yes, I see that too. Not happy.
I haven't installed ASUS's "custom" video driver, and I'm still on 11.1. As of today's, MSI Afterburner doesn't see the voltage controller. Sapphire TRIXX shows a voltage control but it doesn't go lower (and also doesn't seem to do anything for me either.) I managed to get even ASUS SmartDoctor refusing to change voltages too but I think that's just a glitch. ASUS SmartDoctor's UI looks awful
compared to the others. MSI Afterburner is much more functional, but doesn't have the (ill-documented) ASUS "scale frequency by temperature" option.
I guess I'm OK with 880/1100 the 1.157 seems to be designed for, but I'm starting to wish I had bought the MSI 6850, especially if I knew I was taking off the shroud. A shame there isn't an MSI Twin Frozr 6850 (I think it would be too close in performance to the existing MSI TF 6870.)