Re: XPS 8700 A12 Bios PROBLEM
Prior to installing A12 BIOS, did you go into the A11 BIOS, open each screen and write down the current settings, then compare those to the settings in A12?
Advanced- Performance Tuning. Set to Normal or OC1 or OC2?
Advanced- Processor Configuration. All set to Enabled except for "Limit CPUID Value"
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Run the PC pre-Windows diagnostics
Run the Monitor Reset & BID (Built-in Diagnostics)
Out of Warranty Support