Morgoth

System specs first so people know what's going on.
Q9650 CPU
Asus P5Q Deluxe mobo
4Gb (2x2gb) Crucial ballistix tracers (800mhz red edition)
5 hdd's
HIS 4870X2 2Gb card.
Dell WFP2408 ultrasharp 24"
Corsair HX620 (did have Silverstone Zeus 650w, but 2x6pin cables didn't like the new card)
Best the local shops had in short notice was the 620 corsair, not the big one.
While waiting on my EK GPU block order to ship, CPU only on water, card still on air

Now I believe the slight cap whine upon boot is the psu (spinning hdd's and all up)
In games and things so far, it seems mostly pretty stable with that psu, but I think once I get the CPU cranked 3.8+ in games/bench, and the card near 800/1000 it will have some issues.
I've had a couple of random bsods (card on stock clocks) which I believe are actually either due to the RAM getting far too hot, or the PSU having trouble, or both.

Looks like time to get some nice active cooling in place for the RAM on both GPU and system RAM.

Another thing, My water setup is Storm G4 on the CPU, 1/2' clearflex, MCP655 pump, minires, Blackice2 original (not thinner stealth) 2x120mm fat size panaflo fans. all mounted internal on the silverstone tj09 case.
Will the card push it over the limit? I don't think a 3x120 rad will fit....

eva2000

psu probably at it's limits, you'd be approaching 480-560W with quad core + single hx4870x2 at decent clocks excluding the water cooling gear etc

Morgoth

Yeah, I think i'll replace this one with a corsair 1kw or something.