I'm familiar with WEI, yes I have my opinions. A perfect WEI of 7.9 is nearly impossible, and even a SB-E 6-core @ 4.8GHz is 7.8
The problem is WEI artificially, especially with RAM, sets WEI scores. Normally, the maximum with 4GB and Windows 64-bit is 5.5. So 5.3 suggests CAS 9 4GB DDR3-1333. If you want a score higher then you must add more RAM, example 8GB of DDR3-1333 will yield 7.5~7.7, and 16GB+ DDR3-1600 CAS 9 a WEI of 7.9.
In the BIOS, (if possible) set the AI Overclock Tuner -> XMP, save and exit = yes, and then retest.
Otherwise, post a link to your RAM and I'll post the Manual DRAM Frequency, CAS Timings, etc settings...