This Corsair TX Series CMPSU-750TX PSU is defective, right?

I recently purchased a new setup and have been plagued with issues with it. I think it's a combination of several things that is confusing me soooooo much, so it's likely I'll be making new threads once each issue is resolved (unless there is a section where I can have a general troubleshooting thread?).

Let's start with the Corsair TX Series CMPSU-750TX. I got this psu due to it having great reviews. So, I didn't bother checking the 3.3, 5, 12 voltage. However, AFTER installing Windows 7 I noticed random instant power offs. At first I thought it was just Windows 7 or a driver issue, which is probably the cause of my other issues (wrong section, so I won't post it here).

I just checked the bios and noticed the following:

VCore = 1.268V
DDR15V = 1.520V
3.3V = 3.392V
5V = 4.892V
12V = b/w 10.8 to 11V

My set up:

Cooler Master HAF 932 Full Tower ATX Case (RC-932-KKN1-GP)
Intel Core™ i7 Processor 930 2.80GHz w/ 8MB Cache
Corsair Hydro Series H50 CPU Cooler (part cwch50)
Corsair TX Series CMPSU-750TX 750W ATX 12V 60A 24PIN ATX Power Supply Active PFC 120MM Fan
XFX Radeon HD 5770 850MHZ 1GB 4.8GHZ GDDR5 2XDVI HDMI Display Port DIRECTX11 PCI-E2.0 Video Card
Corsair XMS3 TR3X6G1600C9 6GB DDR3 3X2GB DDR3-1600 CL 9-9-9-24 Core i7 Memory Kit
Gigabyte X58A-UD3R ATX LGA1366 X58 DDR3 4PCI-E SATA3 USB3.0 Sound GLAN CrossFireX SLI Motherboard
Western Digital 1TB Caviar Black 7200rpm SATA III w/ 64MB Cache ( 2 of this )
Asus DRW-24B1LT 24x DVD-RW Drive, SATA w/ Lightscribe, Black, OEM
Creative Audigy 2 ZS Sound Card

I also have an older SATA2 80GB hard drive that I would like to use.

At this moment I only connected 1 Western Digital 1TB, not the other WD or the older SATA2. I want to connect those too, but I bet the power would die quicker.

I used this tool to figure out how much I need:

http://www.extreme.outervision.com/psucalculatorlite.js...

Minus the option of the H50 CPU Cooler (no option to select it), it told me I needed: 403W.


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I DO NOT plan on OC'ing it, but will want to put at least another hard drive in it so I can do 2 separate raids (one on sata 3, the other on sata2). It seems to me that this seems to be defective and I should return it back to the store. Agreed?

Secondly, this psu comes with a rebate of $20. I would like to do that before the postmark date, which is on the 21st. If I submit for a rebate, do you think the store will accept the box back (b/c the rebate upc is needed from the box), or will I be stuck with it and deal directly with Corsair (5yr warranty). I would rather deal with the store first to save time and money (got until the 25th to return items back to them for warranty...after that I got to go to the manufacturer).

Hopefully you'll answer fast. Thanks!!!