Just reviving the thread for some LN2 run "notes" for the "good" 9800GTX.
I wanted to get "the feeling" of my new VGA unit from my dear friend Vince ( K|ngp|n ), so I took my best 9800GTX ( 900MHz on stock cooling, Vmodded of course ) and mounted the masterpiece a.k.a. K|ngp|n's Tek9 3.0
I left the rig to load windows and left it idling at desktop while "adjusting" ( lowering ) my GPU's temperature smoothly, to find out where it coldbugs.
The temperature probe was just touching the base of the pot ( haven't drilled it in yet ) [ without any paste, just the top of the probe touching the base ].
The coldbug struck at -53C.
So I was looking to keep the card under that temperature and as close to -52C as possible of course
I was in a rush, so I have done some crazy ( or foolish, or just xtremely crazy ) things:
1) No Vgpu monitoring ( just prep'd the card some secs before mounting the pot )
2) No special cooling for the hot hot mosfets, just a 120mm fan blowing towards them ( shouldn't be worried, but considering the fact that I could be pushing way too much voltage at a point, and the "low" temperature due to the coldbug )
3) Real fast and not good enough insulation ( didn't face a problem, but was way under my "standards" )
4) Bad QX9650 cooled by a Intel Q6600 box cooler [ low clocks ]
5) Low FSB & RAM freq ( my Striker II Extreme was giving me a hard time, failing at pre-tested FSBs & memory dividers/timings configurations )

Anyways, the card "performed" well I must say, I don't know if it can bench higher, but it did 1068MHz on the core for 3D Mark2001SE/03/05/06 [ the voltage should be within the following range, 1.4V < Voltage < 1.6V ], guess we'll find out soon.

As for the Tek9 3.0... needless to say, it's the very best pot I've ever used in my 3yrs of extreme cooling ( Dry Ice & LN2 ).
There was little to none temperature swing in idle & load, I was able to keep the card's temperature at a specific value easily.
The unit truly rocks.
Godlike Vince, godlike!