The new build has not gone well and my current PC is now also not happy .
The build itself was relatively okay, aside from a couple of quality issues with the case (poorly aligned screw holes) but after 10 hours of troubleshooting it seems that the motherboard is essentially knackered on arrival it won't detect any HDDs connected to any SATA port, the front USB connectors aren't recognised and fails to boot up after being powered down for a few minutes (Error says something like CMOS Date / Time Not Set).
Sending the mobo back for a replacement but it won't be until next weekend when my brother can assist me with the build again so I'm back on the current PC which hasn't taken kindly to having bits borrowed (a SATA cable and a couple of HDDs) for the new one and is now intermittently failing to boot despite nothing drastic happening to it.
So, yeah great weekend