The twilight Zone

Now and again,when ever i can,i sell high end PC components.I get complaints from my buyers which on their behalf is justified,but in my opinion they bite more than they can chew,and when get stuck in relatively complicated technical issues,they start blaming me for selling them a faulty component.
In general and in my experience,building any PC using motherboard with Dual PCI express 16X slots can be tricky as the chip connecting the two graphics card slots have very strict compatibility criteria.If you use a non compatible component specially RAM,the PC may not boot up or crash frequently.The main problem lies in the firmware of the BIOS.Manufacturers roll out newer CPU and RAMs with higher frequencies and voltages,and the BIOS firmware being older does not recognize them and supplies wrong voltage.Result is a frozen computer screen,sometimes so badly that you can't enter the bios setup.
The simple remedy is to keep handy a basic Processor,no dual or quad core and an older RAM.Start the computer with basic CPU and RAM and then update the BIOS to the latest version by downloading the file from Motherboard manufacturer's website.
Once done,you can use any high end processor or RAM the motherboard is built to comply with.
If you don't want to update the BIOS or can't do it for some reason,most BIOS can be popped out of their socket with the help of a paper clip,and you can ask the manufacturer for a new updated chip.This does not cost a fortune but takes time.Once you receive the updated BIOS,you can simply push it in the socket.
Many times what you see on the computer screen is not true.For example the RAM or CPU votage can be up to 25% higher or lower than what it shown in the BIOS setup screen.Then you may hit and try.Just increase and decrease the voltages gradually until you get yourself a stable system.
If nothing works,keep a 5KG sledge hammer ready,and use it for obtaining the peace and tranquility back in your life.