Xilence 550w enough or time to upgrade?

System specs
Motherboard - Foxconn P35AX-S http://www.foxconnchannel.com/ProductDetail.aspx?T=motherboard&U=en-us0000339
CPU - Q6600 http://ark.intel.com/products/29765/Intel-Core2-Quad-Processor-Q6600-(8M-Cache-2_40-GHz-1066-MHz-FSB
RAM - Kingmax DDR2 1066mhz 2x2GB 1,8-2v
GPU - Club3D HD6770 http://www.club-3d.com/index.php/products/reader.en/product/radeon-hd-6770.html
PSU - Xilence 550w http://www.xilence.net/en/products/power-supplies/red-wing-series/redwing-series-550w-r3.html

CPU OC 380 x 9 = 3420mhz @1,45v
FSB : DRAM 1:1
GPU OC 885MHZ core 1255mhz memory

I am a little worried about my power supply and also the motherboard. I think i might be pushing both a little too far with my current overclock.
I used this http://extreme.outervision.com/PSUEngine to calculate my PSU needs and the results were close to 500w recommended with the cpu taking a massive 182w.
Another thing is the system temperatures are a little higher than they used to be before i upgraded from my E6420 to Q6600 and the NB heatsink is really hot to the touch, i don't have anything to measure it precisely but i'm guessing it must be arround 70C.
While a NB heatsink + fan upgrade is cheap what i'm really worried about is the PSU that tends to get rather warm under load. Back before i even started overclocking anything i had a Zalman PSU die on me and since then i'm a little paranoid...

If i am to get a new PSU what would you recommend? I would want something with 2pci connectors in case i decide to upgrade my GPU or go for another 5770/6770 and crossfire them.

TY in advance!

OT
My bios is kinda buggy, i have the options to change my NB and RAM voltages, but when i do there's just no effect both the bios hardware health screen reports stock voltages and HWMonitor Everest FoxOne all report them being stock, atleast i can change my vcore which allowed me to overclock the cpu, but i can't get a stable overclock with just a vcore bump, the motherboard is rated @ 1333mhz FSB and it gets unstable when i push it beyond 1525mhz on stock volts. I can however use the FoxOne utility to overvolt things in windows but i'd rather do it via bios if it allowed me to...

I'd worry about it too. Not because you're edging up on 500w (I'd be surprised if you were anywhere close), but because I cannot find any reviews of that PSU. The specs look suspicious as well.

Northbridge temp wise, just aim a fan at it. No need for a dedicated cooler upgrade on the NB.

There's a decently sized list of units that are known-good in the stickies here.
Anything certified good by our frontpage reviews here, Funkykit.com's reviews, techpowerup or hardwaresecrets or hardforum or jonnyguru will do you well.
That's the quick list from memory of sites that do real power supply testing. I know I've missed at least one.
I do the PSU reviews for OCF and Funkykit, for whatever that is worth.

Thanks for the quick reply. I am not surprised there's no info about my PSU, it wasn't my choice to buy it and i didn't have enough understanding about computers at the time. Most of the components available locally are overpriced low end junk.
As for the fan aimed @ NB i'm afraid i have this huge thing http://www.asus.com/Thermal_Solution/Multiple_platform/Silent_Square_Pro/ cooling my cpu and there really isn't any room for anything other than a NB heatsink with a small fan. I could stick a case fan right in front of the NB, but that would mean closing the case up which i have wide open right now and my guess is that that will only cause more hot air to get trapped.

Something like this will almost certainly fit:
http://www.newegg.com/Product/Product.aspx?Item=N82E16835426033
1/2" tall, 2.2" square.
Should fit on top of or next to the NB heatsink and under the CPU heatsink.

I use old AMD heatsink fans

Actually that fan idea was pretty good, i had a 120cm PSU fan lying arround from that fried Zalman. It had a 2 pin connector, but i managed to wire it up to a 3 pin fan connector on the board right next to the NB and atleast the system temperature is a whopping 15C cooler than it was before. Also it seems to keep the NB heatsink cool now.
The PC seems to be louder now tho, anyway what PSU would you suggest for my rig once i get 2 HD6770 crossfired and keep the Q6600 runing at up to 3,6ghz 1,5v?