Stable PRIME and gamming 460x8

Code:
******Motherboard Intelligent Tweaker (M.I.T.)******
 
Robust Graphics Booster.........................[ Auto     ]
CPU Clock Ratio.................................[ 8        ]
Fine CPU Clock Ratio............................[ + 0.0    ]
CPU Frequency 4.0GHz............................[ 460 x 8  ]
 
******Clock Chip Control******
 
CPU Host Clock Control..........................[ Enabled  ]
CPU Host Frequency (Mhz)........................[ 460      ]
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     ]
MCH Clock Skew..................................[ 0ps     ]
 
******DRAM Performance Control******
 
Performance Enhance.............................[ Standart    ]
(G) MCH Frequency Latch.........................[ AUTO   ]
System Memory Multipler.........................[ 2.40B    ]
Memory Frequency 1066............................[ 1120     ]
DRAM Timing Selectable..........................[ Manual   ]
 
CAS Latency Time................................[ 5        ]
tRCD............................................[ 5        ]
tRP.............................................[ 5        ]
tRAS............................................[ 15       ]
 
******Advanced Timing Control******
 
tRRD............................................[  Auto       ]
tWTR............................................[  Auto       ]
tWR.............................................[  Auto       ]
tRFC............................................[  60      ]
tRTP............................................[ Auto         ]
Command Rate (cmd)..............................[ 2T       ]
 
******Channel A Timing Settings******     
 
Static tRead Value        [ 10 ] ...............   [ 9      ]
tRD Phase0 Adjustment     [ 0 ] ................[ Auto     ]
tRD Phase1 Adjustment     [ 0 ] ................[ Auto     ]
tRD Phase2 Adjustment     [ 0 ] ................[ Auto     ]
tRD Phase3 Adjustment     [ 0 ] ................[ Auto     ]
 
tRD 2rd (Differnt Rank)   [ 6 ] ................[ Auto     ]
tWR 2wr (Differnt Rank)   [ 6 ] ................[ Auto     ]
tWR 2rd (Differnt Rank)   [ 5 ] ................[ Auto     ]
tRD 2wr (Same/Difft Rank) [ 8 ] ................[ Auto     ]
 
Dimm 1 Clock Skew Control.......................[ Auto     ]
Dimm 2 Clock Skew Control.......................[ Auto     ]
DDR Write Training..............................[ Auto     ]
 
******Channel A Driving Settings****** 
 
Drive Strength Profile..........................[ OC-1333    ]
Data Driving Pull Up Level......................[ Auto     ]
cmd Driving Pull Up Level.......................[ Auto     ]
ctrl Driving Pull Up Level......................[ Auto     ]
clk Driving Pull Up Level.......................[ Auto     ]
 
Data Driving Pull Down Level....................[ Auto     ]
cmd Driving Pull Down Level.....................[ Auto     ]
ctrl Driving Pull Down Level....................[ Auto     ]
clk Driving Pull Down Level.....................[ Auto     ]
 
******Channel B Timing Settings******     
 
Static tRead Value        [ 10 ] ...............   [ 9       ]
tRD Phase0 Adjustment     [ 0 ] ................[ Auto     ]
tRD Phase1 Adjustment     [ 0 ] ................[ Auto     ]
tRD Phase2 Adjustment     [ 0 ] ................[ Auto     ]
tRD Phase3 Adjustment     [ 0 ] ................[ Auto     ]
 
tRD 2rd (Differnt Rank)   [ 6 ] ................[ Auto     ]
tWR 2wr (Differnt Rank)   [ 6 ] ................[ Auto     ]
tWR 2rd (Differnt Rank)   [ 5 ] ................[ Auto     ]
tRD 2wr (Same/Difft Rank) [ 8 ] ................[ Auto     ]
 
Dimm 1 Clock Skew Control.......................[ Auto     ]
Dimm 2 Clock Skew Control.......................[ Auto     ]
DDR Write Training..............................[ Auto     ]
 
******Channel B Driving Settings****** 
 
Drive Strength Profile..........................[ OC-1333     ]
Data Driving Pull Up Level......................[ Auto     ]
cmd Driving Pull Up Level.......................[ Auto     ]
ctrl Driving Pull Up Level......................[ Auto     ]
clk Driving Pull Up Level.......................[ Auto     ]
 
Data Driving Pull Down Level....................[ Auto     ]
cmd Driving Pull Down Level.....................[ Auto     ]
ctrl Driving Pull Down Level....................[ Auto     ]
clk Driving Pull Down Level.....................[ Auto     ]
 
******Motherboard Voltage Control******
 
Load-Line Calibration...........................[ Enabled ]
CPU Vcore         [ 1.2500 ]...................[ 1.4312 ]
CPU Termination   [ 1.20    ]...................[ AUTO   ]
CPU PLL           [ 1.50    ]...................   [ 1.65    ]
CPU Reference     [ 0.760   ]...................[ AUTO   ]
 
MCH Core          [ 1.100   ]...................[ 1,54    ]
MCH Reference     [ 0.760   ]...................[ AUTO  ]

ICH I/O           [ 1.500   ]...................[ 1.57 ]
ICH Core          [ 1.100   ]...................[ 1.2  ]
 
DRAM Voltage      [ 1.800   ]...................[ 2.180 ]
The auto Values under ET6 are:
VTT: 1,5
cpu ref : 0,805
mch ref: 0,76




This 8x460 is rock !
But 8,5 dont work


And 8x470 starts failing!


Any improves are welcome:
cpu voltage, etc etc

I have Swiftech Water block, with MORA2 full copper (big big radiator)


In-fluence,
I will try your vtt and refs instead of AUTO