Igormaiden, I cannot predict anything without looking at the actual error.
But I would suggest you to reset the BIOS to factory settings and running CPU in stock speed just to get everything working first.
Once everything is ok you can over clock if it is important. (Over clock it to 4.2 SSDT is available in multibeast)
I would take the GPU out or power it down to test everything is working and then install the GPU back but, it is up to you.
If you decided to take the GPU out of power it down then.
BIOS settings
Advance > Advanced\North Bridge Configuration
Primary Graphics Adapter > Onboard (HD3000) PCI (GPU)*
Share Memory > 64MB*
Render Standby > Disabled*
Advanced\South Bridge configuration
Deep Sleep > Enabled in S5*
Advanced Storage Configuration
SATA Mode > AHCI*
Hard disk SMART > Enabled*
ADvanced\Super IO config > Serial Port - Disable
Advanced ACPI conf
Suspend to RAM > Disabled*
ACPI HPET Table > Enabled*
RTC Alarm power on > by OS*
reset of the option here is disabled.
Not so imp settings but runs the build super quite. Once you bootin fans are controlled by OSX.
HW Monitor
CPU FAN > Level 2
Chassis fan settings > Level 4
Download the attached DSDT unzip it and keep it on the desktop run the Latest Multibeast with below settings.
Check TRIM Enabler only if you have SSD else do not check it.
View attachment 41164
Note: If you run the CPU on stock speed check only the stock speed SSDT file from Multibeast (First under SSDT Option)
When you decide to over clock the CPU to 4.2Gz install the over clocked SSDT file from Multibeast (3rd option under SSDT option).