Difference is best explained here http://www.overclock.net/t/946407/amd-motherboards-vrm-... but the short of it is the power phases and VRM cooling which is essential for high power CPU's like the FX 8 core. The DS3P falls in the not good 8 core group! The UD3P is newer version of the UD3 sharing the 8+2 power design and is good with 8 core.
first of all try to clean the cache and then remove all temporary files and try to optimize your computer with good cleaner and antivirus software. if it is still not working then contact on toll free - 1866 283 6613.