Aurora R4 Bios A03: We strongly recommend that all Aurora R4 customers immediately update to A03 BIOS. This BIOS update contains a new microcode to enhance CPU overclocking stability. The A03 BIOS specifically addresses some customer reports of black screen or “freeze” during operating system boot, which occur only when overclocked and more frequently during cold starts or low room temperatures. This new microcode fixes a low-temperature CPU PLL startup issue, which may explain why some northern-hemisphere customers reported this occurrence. We wish to thank you guys for your valuable social feedback, and know we quickly took these reports to our engineering teams.
http://dell.to/wyAtG8

Alienware X51 Bios A02: We strongly recommend that all Alienware X51 customers immediately update to A02 BIOS. This BIOS update includes new BIOS settings to prevent a customer from accidentally switching into an incompatible BIOS boot mode that prevents the HDD detection. The A02 BIOS settings now include both uEFI and Legacy boot mode options, which allow both GPT and LBA boot HDDs to be utilized. This BIOS update is transparent to the user because it will not reset the customer’s current BIOS boot mode. We have no customer reports of this HDD detection issue, but we need to be proactive in preventing any possible occurrence.
http://dell.to/Av9zuj

You guys should also address this issue with the older versions of the Aurora. But I don't think that was an Overclocking issue, it seems to happen when External Media devices are used (external hdds, SD cards, Cell phones, etc, etc).

I have seen this happen a several times. Though those times were caught here so I wonder how many times someone has had this simple issue and not known...and then just called support. It's not a major issue but the symptoms are the same as what have read with the problem you just solved with this bios update.