Hi. I ordered this built from Overclockers at the start of the month:
Intel Core 2 Duo E8500 LGA775 'Wolfdale' 3.16GHz (1333FSB)
Asus GeForce 9800 GT HybridPower 512MB GDDR3 HDTV/DVI (PCI-Express)
Gigabyte GA-EP45-DS3R Intel P45 (Socket 775) PCI-Express DDR2 Motherboard
Corsair TX 750W ATX2.2 SLI Compliant PSU
Antec 900 Nine Hundred Ultimate Gaming Case - Black (No PSU)
Western Digital Caviar Black 750GB SATA-II 32MB Cache
Corsair 4GB DDR2 XMS2 PC2-6400C5 TwinX (2x2GB)
Seagate Barracuda 7200.10 160GB SATA-II 8MB Cache
Pioneer DVR-216DBK 20x DVD±RW SATA Dual Layer ReWriter (Black)
First and foremost, am I right in thinking that all this is compatible? Due to time constraints, I had a shop do the assembly and they say no power output is coming from the PCI/PCI-E slots. Also if it is any help, at the top right corner of the Motherboard there are some LED's ranging from green to red, mine goes all the way up.
Intel Core 2 Duo E8500 LGA775 'Wolfdale' 3.16GHz (1333FSB)
Asus GeForce 9800 GT HybridPower 512MB GDDR3 HDTV/DVI (PCI-Express)
Gigabyte GA-EP45-DS3R Intel P45 (Socket 775) PCI-Express DDR2 Motherboard
Corsair TX 750W ATX2.2 SLI Compliant PSU
Antec 900 Nine Hundred Ultimate Gaming Case - Black (No PSU)
Western Digital Caviar Black 750GB SATA-II 32MB Cache
Corsair 4GB DDR2 XMS2 PC2-6400C5 TwinX (2x2GB)
Seagate Barracuda 7200.10 160GB SATA-II 8MB Cache
Pioneer DVR-216DBK 20x DVD±RW SATA Dual Layer ReWriter (Black)
First and foremost, am I right in thinking that all this is compatible? Due to time constraints, I had a shop do the assembly and they say no power output is coming from the PCI/PCI-E slots. Also if it is any help, at the top right corner of the Motherboard there are some LED's ranging from green to red, mine goes all the way up.

Oh well, I'll get in contact with Overclockers.