Thanks everyone

Here are some details:

Powersupply is combined from two 430W server PSUs with PC Power & Cooling TWIN-POWER.900 unit and a friend of mine (Kamu) modified normal ATX 460W PSU to supply +3,3V. PSU has no problems to handle +35 amp load.

Macci and The Stilt not involved, they live in another city. These overclocking results are done by me and my friend Kamu. Although we will have a nice sauna/overclocking session together in few weeks

N0 stepping seems to love cold and we ran our tests @ -140 Celsius.

I talked with Steve/OCZ about their DDR2 memory modules but for some reason their sales department didn't contact me in time so I had to use Kingston HyperX DDR2 modules with lame CAS-settings. Maybe we'll do another run with OCZ memories if I manage to get them.