No Video Signal 9800 GTX+

Hello, we'll this is a very confusing issue... so here goes:

I purchased a Evga 9800 GTX and a 700W OCZ PSU 2 months ago and they have been running fine ever since, however I just got home from a 3 week vacation yesterday (everything was unplugged before i left) and my PC wouldn't boot up at all, the fans would spin for .5 seconds then shut off. I assumed it was either the PSU or my motherboard so I had already bought new hardware while I was on my trip and decided to install it all in case it was my motherboard. I installed everything correctly I believe, I added the following parts to my system:

Motherboard: Gigabyte GA-EP45-UD3R
http://www.newegg.com/Product/Prod [...] 6813128359

CPU: Intel Q6600
http://www.newegg.com/Product/Prod [...] 6819115017

CPU COOLER: Asus Arctic Square
http://www.newegg.com/Product/Prod [...] 6835101010

RAM: Corsair XMS2 DHX 4GB DDR2 800 (PC2 6400)
http://www.newegg.com/Product/Prod [...] 6820145194

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GPU and PSU (2 months old):

GPU: EVGA 9800 GTX+ 512MB
http://www.newegg.com/Product/Prod [...] 6814130376

PSU: OCZ 700W GameXStream
http://www.newegg.com/Product/Prod [...] 6817341002
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Alright, so onto the problem.. I installed everything and the PC started up just fine but I forgot to put in my vista CD to reformat so I put in my CD turned it off and turned it back on and from then on I haven't been able to get any video (I've gotten it to show video maybe twice all day after that). I reseated the video card twice, took out the bios battery and put it back in and still nothing. All the power cables needed for the card were plugged in correctly. I called up one of my friends and he let me borrow another video card to test and I took out my 9800 GTX and plugged it in and I could get video everytime (this card didn't require any cables to power it). However this is where I get confused, while I was troubleshooting the no video problem when I turned on my pc the power was going nuts, it was going on and off and before I installed my new parts I couldn't even get it to turn on but now it's stable with this other video card which brings me to think this is a PSU issue and my graphic card isn't faulty(Can I test to see if my PSU isn't providing enough power now for my 9800 gtx?), I know I can't answer this question without testing both the PSU and the GPU on other computers but I do not have another computer to test this on right now so I'm just looking for some opinions if any of you have some.

- Not a heat issue I don't think:

GPU ~40c
CPU ~27c

Here's a picture of my PC after installing the new parts (yes i know the ram isn't matched but I fixed that already).
Don't mind the wiring.. its temporary.

http://img233.imageshack.us/my.php?image=029dh7.jpg

Thanks guys.