1.536 may be correct. Often there is a small difference in the actual and what is listed in the general specs. It is just so close they round it off.
Checking the power supply is a good start. That it is functioning properly and that it is of decent quality and that it is adequate for the system.
Also check for BIOS updates and that the CPU is actually supported.
In the MIT section of the BIOS make sure the "performance enhance" option is set to "standard". It is usually set to "turbo" by default. Make sure the memory timings are correctly set. If not set them manually. You may need to set the timings to "manual" to see them, if they are correct set it back to auto, if not make the necessary changes and leave it on manual.
8 Pro 64bit
AMD FX 8350
Asus Sabertooth 990FX R2.0
16GB G.Skill Sniper 1866MHz
OCZ Vertex 4 128GB SSD
HDD's 3TB/2x 750GB/500GB/250GB
2x XFX 6870 1GB
PC P&C 750W PSU
Cooler Master HAF 932 Red LED
CM Hyper 212 EVO w/2x SickleFlow 120mm Red LED
Logitech X540 5.1 Surround
2X Acer 23" LED - Eyefinity: 3840x1080
"The significant problems we face cannot be solved at the same level of thinking we were at when we created them."
- Albert Einstein