PSU = Corsair TX750 ( 750W )
CPU = Intel Core 2 Quad Q9450
RAM = G.Skill DDR3-1600 2GB Black Heatspreaders HZ Series [ Micron D9GTR chips ]
HDD = Raptor (non-x version) ( 150GB, SATA II )
VGA1 = eVGA 8800GT SC version 512mb
VGA2 = eVGA 8800GT SC version 512mb
SPU = Auzentech X-Fi Prelude
NorthBridge Cooling = Stock cooler with a fan (scythe mini-kaze 40mm) above it blowing towards the NB
SouthBridge Cooling = Stock cooler (Armor+ fan blows towards it)
CPU Cooling = ThermalRight Ultra-120 Extreme
RAM Cooling = None
BIOS version 0801

BIOS Settings
Extreme Tweaker
CPU Level Up = Auto
Memory Level Up = Auto
AI Overclock Tuner = Manual
CPU Multiplier = 8
FSB - Memory Clock Mode = UnLinked
FSB - Memory Ratio = Manual
FSB (QDR) MHz = 1800
MEM (DDR) MHz = 1600
LDT Frequency = 5x
PCIE Bus Slot 1 & 2 MHz = 100
PCIE Bus Slot 3 MHz = 100
SPP<->MCP Ref Clock, MHz = 200.0MHz
SLI-Ready Memory = Disabled

Memory Timing Setting
P1 = Enabled
P2 = Enabled
tCL ( CAS Latency ) = 7
tRCD = 7
tRP = 7
tRAS = 18
Command Per Clock (CMD) = 2T
tRRD = Auto
tRC = 30
tWR = Auto
tWTR = Auto
tFAW = Auto
tRD = Auto
tRTP = Auto
tRFC = Auto
tREF = Auto

Over Voltage
CPU Voltage = 1.32500V
Loadline Calibration = Enabled
CPU PLL Voltage = Auto
CPU VTT Voltage = 1.30V
Memory Voltage = 1.86V
NB Core Voltage = 1.44V
SB Core Voltage = 1.50V
CPU GTL REF0 Ratio = Auto
CPU GTL REF1 Ratio = Auto
CPU GTL REF2 Ratio = Auto
CPU GTL REF3 Ratio = Auto
NB GTL REF Ratio = Auto
DDR3 CHA1 Ref Volt = DDR3_REF
DDR3 CHB1 Ref Volt = DDR3_REF
DDR3 CHA2 Ref Volt = DDR3_REF
DDR3 CHB2 Ref Volt = DDR3_REF

CPU Configuration
CPU Internal Thermal Control = Disabled
Limit CPUID MaxVal = Disabled
Enhanced C1 (C1E) = Disabled
Execute Disable Bit = Disabled
Virtualization Technology = Disabled
Enhanced Intel SpeedStep(tm) Tech. = Disabled
CPU Core 2 = Enabled
CPU Core 3 = Enabled
CPU Core 4 = Enabled

Spread Spectrum Control
CPU Spread Spectrum = Disabled
PCIE Spread Spectrum = Disabled
MCP PCIE Spread Spectrum = Disabled
SATA Spread Spectrum = Disabled
LDT Spread Spectrum = Disabled

Problem Description
I'm having system freezes when watching videos with Media Player Classic and VLC player whenever SLI is enabled. ~20 secs after I started the movie/video, it will freeze, a beep will sound and restarting is the only solution.
I have tried BIOS 0703, 0704, 0801. Codecs 3.9.0 and 3.9.5 also different SLI bridge and GeForce drivers 169.21 WHQL, 174.74BETA, 175.16WHQL and 175.80

PLEASE HELP