Start from the bare necessities and see if everything starts up.
+1, put it together without the drives or case (but with a monitor) just to make sure it POSTs and everything.
Other random tips:
- Put the power supply in first, so you can get a good feel for where the power cables need to go. Sometimes you need to place some in advance, though I doubt you'll need to in the Phantom.
- Make sure not to forget the mobo standoffs, and make sure they all line up. If you have an empty hole, or a standoff installed but no hole in the mobo for it, then obviously it needs fixing.
- Remember all of the power connectors. You'll need:
2 Sata (DVD/HDD)
1 24-pin (Mobo)
1 8-pin (CPU...top left on the mobo)
2 PCIe 6-pin (on the GPU)
1 Molex (for the fan controller)
- Remember to use your cable management. It's just going to bug you later if you don't haha. You should be able to fit everything behind the motherboard tray.
- Don't panic when something goes wrong. Something
will go wrong, and it will most likely be a connector that isn't seated properly...you'll just have to find it.
- When you mount the PSU, put it with the fan facing down unless you're going to be putting the case directly on carpet. In that case, face it up.
- Use the top PCIe x16 slot for your GPU (in case you didn't know already)
edit: Wait a minute, your post was 6 hours ago...you've probably been gaming on it for quite a while haven't you