New Build but No Visual

[Bauza23]

I've just completed a new build from the following components;

Xenon AMD Phenom II X4 840 3.20GHz Bundle - Quad Core
XFX ATI Radeon HD 5770 Single Slot 1024MB GDDR5 PCI-Express Graphics Card
Samsung SpinPoint F3 1TB SATA-II 32MB Cache - OEM (HD103SJ)
Corsair Builder Series CX 430W ATX Power Supply (CMPSU-430CXUK)
Samsung SH-S223L/RSMN 22x DVD±RW SATA Lightscribe ReWriter (Beige/Black/Silver) - Retail
Coolermaster Elite 330 Midi Tower Case - Black

Tried to power it on, power seems fine - rear fan is running, GPU fan is running, CPU fan is running (so I would assume power is fine to all the key components) plus the RAM and CPU was prebuilt by Overclockers so I doubt there would be any problems there. However I'm receiving no visual on my monitor.

At first I thought it may be a lack of drivers on the GPU so I tried the onboard VGA slot and still the same problem, any ideas? Surely it must be something stupid that I'm missing? ...or at least I hope so!

 

[Bauza23]

This is the part where I assume I may be going wrong.. I have no 4 pin power connections from the PSU asides from the detachable one on the 24 pin input, which is already plugged into the 24 pin port.

Incidentally the 6 pin port is plugged into the PCI-E GPU too.

The motherboard is a Gigabyte GA-M68MT-S2 if that's any help?

 

[Bauza23]

Ugh, I'm such a moron, cheers mate.

Definitely making some progress, getting the initial one beep from the motherboard now but still no visual on the monitor..

 

[Bauza23]

Didn't realise I still had it in the VGA port as opposed to in the 5770, thanks guys, potential nightmare over!