Is This PSU Sufficient?

[SpartanGTR]

Ok. I ordered a complete system off of newegg recently and would like to know if everything will be compatible. After checking out a recent power supply calculator online that told me my system would only need ~680 watts of power, I went ahead and ordered the system, however I have some doubts.

This is my system:

-GIGABYTE GA-P35-DS3P motherboard
-Intel Core 2 Quad Q6600
-Creative Sound Blaster X-Fi XtremeGamer
-GeIL Black Dragon 4GB(4 x 1GB) 240-Pin DDR2 SDRAM DDR2 800
-[TWO] Seagate Barracuda 7200.10 320GB
-[TWO] Sapphire ATI Radeon HD2900 XT 512MB in Crossfire
-Zalman 9700 CPU Cooler

Now... taking into account everything above, and the usual extra components like mouse, keyboard, DVD-ROM, occasional iPod and blah blah..., will all this be too much for this power supply?:

PowerTek770W ATX 12V 2.2

It's a 770 Watt, moderately efficient power supply from a brand I have never bought before, however it was on sale and it seemed like a good PSU. But, no matter the price, I am not sure if this PSU will be able to keep the Quad CPU, HD2900XT Crossfire party happy, all the while leaving enough headroom for overclocking. Any thoughts guys?

 

[mpilchfamily]

That is a killer rig. The PSU is a decent unit and offer 42A on the +12v rails which will be fine for that system but i would exspect a little more power on the +12v rail with a 770W unit. I find it odd that it lists 42A on the +12v rail yet shows that there is 625W on the +12v rail which means it actually has 52A on the +12v rail. The PSU will be fine but you may want to consider a better unit in the near future.

 

[John]

That looks like a generic psu, and I would avoid it for these reasons.

1) Peak rated garbage numbers
2) Lack of certs on the label
3) Combined -5V, 5VSB and -12V (72W??) is 202W
4) Only 2x 6-pin PCIe

Don't waste your money and risk your high end hardware. Do it right the first time and buy a quality psu. At the minimum a Corsair HX620 for $90 AR will power your rig but won't leave a lot of headroom if you're going to o/c. Otherwise consider the following:

Silverstone ST85ZF
Enermax Infiniti 720W
PCP&C Silencer 750Q

 

[SpartanGTR]

Thanks! I should have been looking at one of these instead of looking at prices. How ironic that I would try to get a bargain on a very important piece when you look at the rest of my system. And also, from what I understand this motherboard only supports PCIe x16 on one slot when in Crossfire, while the other is in x4? or is it dual x8? ... This has always confused me. Are there any intel boards out now that support full speed dual PCIe x16? If not I can always swap out mine for the upcoming x38

 

[SpartanGTR]

Ahh... I found that same Silverstone in a Crossfire cert. form with 2x 8-pin PCIe... Great help! thanks