Leave the dram terminations on Auto, and you should not have to use 2t at all unless this is super crappy memory

I only mentioned the x20 for CPU multi, I see why you are using 20 uncore and that is fine, you may even have better luck with 22

This is what I suggest for your settings mentioned above

0X00000050 << Incorrect Memory Timing/Freq or Uncore Multi
0X00000124 << Incorrect QPI/Vtt Voltage (To Much/Not Enough)
0X00000101 << Not enough Vcore Voltage

Code:
Advanced CPU Features:
CPU Clock Ratio ................................ [20x]
Intel(R) Turbo Boost Tech .................. [Enabled]
CPU Cores Enabled ............................ [All]
CPU Multi Threading .......................... [Enabled]
CPU Enhanced Halt (C1E) ................... [Disabled]
C3/C6/C7 State Support .................... [Disabled]
CPU Thermal Monitor ......................... [Enabled]
CPU EIST Function ............................ [Disabled]
Virtualization Technology ................... [Enabled] << Disabled if you do not use Vmware or Virtual PC Programs
Bi-Directional PROCHOT ..................... [Enabled]


Uncore & QPI Features:
QPI Link Speed .............................. x36 or x44
Uncore Frequency ..........................  20-22 (Always 2x memory Multi or 2x +1, 2x +2, ect) 
Isonchronous Frequency ..................[Enabled]


Standard Clock Control:
Base Clock (BCLK) Control ................ [Enabled]
BCLK Frequency (MHz) ..................... 133
PCI Express Frequency (MHz) ........... [100]

C.I.A.2 [Disabled]

Advanced Clock Control:
CPU Clock Drive ..............................[800mV]
PCI Express Clock Drive ................... [900mV]
CPU Clock Skew ............................. [0ps]
IOH Clock Skew ............................. [0ps]


Advanced DRAM Features:
Performance Enhance ...................... [Standard]
Extreme Memory Profile (X.M.P) ......... [Disabled]
System Memory Multiplier (SPD) ........ [10x]
DRAM Timing Selectable (SPD) .......... [Manual]

Channel A + B + C

Channel A Timing Settings:
##Channel A Standard Timing Control##
CAS Latency Time ......................7
tRCD .......................................7
tRP .........................................7
tRAS .......................................20

Below values may be left in Auto if you like, generally this is fine.  For those users who DO Set advanced timings manually, please see some of my thoughts and findings about these settings and rules here
XtremeSystems Forums - View Single Post - Gigabyte EX58-UD5/Extreme Discussion Thread


##Channel A Advanced Timing Control##
tRC ........................................  Auto (Should be = tRAS + tRP or above for stability)
tRRD ....................................... Auto
tWTR ...................................... Auto (Must be Write to Read Delay/Same Rank - (tWL + 4)
tWR ........................................ Auto 5-12 (Odd # values likely will fail)
tWTP .......................................  Auto  (tWTP Must = tWR + tWL + 4)
tWL ........................................  Auto  (tWL Must be CAS Latency -1)
tRFC ....................................... Auto (Check in Memset/Cpu Tweaker to be sure Auto is at least setting 72-84)
tRTP ....................................... Auto
tFAW ...................................... Auto
Command Rate (CMD) ................ 1

##Channel A Misc Timing Control##
Round Trip Latency ................... Auto



Advanced Voltage Control:

CPU
Load Line Calibration ................. [Disabled]
CPU Vcore ...............................Auto 
QPI/VTT Voltage 1.150v ............ 1.25-1.4 (For 1333 you should not need 1.4, but your CPU itself may be one that needs high Vtt, see BSOD Codes above to decide)

CPU PLL 1.800v .......................1.8 or Auto

MCH/ICH
PCIE 1.500v ........................... Auto or 1.5-1.54
QPI PLL 1.100v ....................... 1.2-1.24
IOH Core 1.100v ..................... 1.2-1.24
ICH I/O 1.500v ....................... Auto or 1.5-1.58
ICH Core 1.1v ........................ 1.14-1.2

DRAM
DRAM Voltage 1.500v .............. 1.64-1.66
DRAM Termination 0.750v [AUTO]
Ch-A Data VRef. 0.750v [AUTO]
Ch-B Data VRef. 0.750v [AUTO]
Ch-C Data VRef. 0.750v [AUTO]
Ch-A Address VRef. 0.750v [AUTO]
Ch-B Address VRef. 0.750v [AUTO]
Ch-C Address VRef. 0.750v [AUTO]