(Graphic Card + power supply) plz help =( ill respond my best

Here my problem 1st:

I installed a nvidia geforce 8600 gts it works fine for 2yr years , its over-heat during the summer if I don't have the air conditioner on but works through it, so its not a heating problem anymore since its far in winter-spring and im assuming its a power supply problem because after playing Battlefield: Bad company 2 the power keep turning off so I install a rocketfish gaming 500w Power Supply Unit (600w peak) and make sure I put everything fully back on, old PSU main connector was 20pin, 3x Peripheral Power connector 4 pins for drives, and 1x 4pin CPU power connector, but i hope i install the new one correctly, main connector was 20pin+4pin ( I only put 20pin because like the old one), All Peripheral Power connector on the drives and CPU power connector comes with 4+4 pin i got room for only 4 so i leave that one unplug. Next I plug in the graphic card but Blank screen and No signal Fan works everything lights up, but i do noticed that my CDROM drive is blinking alot, I tried this without nvidia geforce 8600 gts and use the onboard Integrated NVIDIA GeForce® 6100 graphics and everything works but I cant play any games as well.

-I tried

*safe mode, disable onboard Graphic and installing the better one
*BIOS check and turn on PCI-E 1st and again with PCI
*rearrange the RAM (I notice i have 1.89GB but i had 2GB 5 days ago when I did a system check to run the game)
*I check all the different wire making sure its all working
*I also spend like 8-11hrs reading other people post and trying to resolve this myself
*I update my driver

Everything works fine without my nvidia geforce 8600 gts... that might be the problem but if I buy a better one this problem might happen again...



This is my system:

Processor:AMD AthlonTM 64 X2 4200+, Dual Core processor with AMD64 Technology

2.2 GB 2000 MHz system bus 512 KB ×2 L2 cache

Memory:Installed: 2048 MB DDR 400 MHz (PC3200) memory (four 512 MB modules)Expandable to: 4 GB

Video:Integrated NVIDIA GeForce® 6100 graphics

Audio: Integrated AC '97 Audio with 6 Channel Audio (5.1)

Hard Drive:320 GB 7200 RPM PATA hard drive with 2 MB cache

Optical Drive:DVD +/- RW, 16X Multi-Format Double Layer (up to 8.5 GB) Write max:16X DVD-/+R, 6X DVD-RW, 8X DVD+RW, 4X DVD+R DL, 40X CD-R, 24X CD-RW Read max:16X DVD-ROM, 40X CD-ROM

Media Reader: 9-in-1 Digital Media Manager supporting the following:

CompactFlash Card, IBM MicroDrive, Memory Stick, Memory Stick Pro, SmartMedia Card, Secure Digital(SD)/MMC, Compact Flash, Multimedia Card, USB 2.0 or later

Network:Integrated 10/100 Mbps Ethernet LAN

InterfacesS/2 keyboard port, PS/2 mouse port, Seven USB 2.0 ports (four on rear panel, two on front panel, one in media reader),Three IEEE-1394a connectors (one on rear panel, two on front-panel), One parallel port, One RJ-45 LAN port, Five audio jacks (three on rear panel, two on front panel)

Add-In Card Slots:One PCI-Express ×16, One PCI-E ×1,Two PCI conventional

Drive Bays: Two external 3.5-inch, Two external 5.25-inch, Two internal 3.5-inch

*Added component*
nvidia geforce 8600 gts
rocketfish gaming 500w Power Supply Unit (600w peak)

Try the card in another computer. If not, make sure the card is dust-free.

If you need a new GPU, an HD5670/HD5570 would be a good upgade for $85/$75 respectively.

I will try my graphic card on a new computer, but wouldn't a New computer from Bestbuy be better then all the working I'm putting up with to upgrade, graphic card ~$100, 4x 1GB is like $70 each $280, window 7 ~$100, Quadcore ~$300, but I do love to do this as a hobby.

Monday morning is when i go get a new GC and I'll let you know and Thank You very much