So any tweaks I can make to increase stabilization? The system is more solid now that I've upgraded the Memory (Had OCZ Reaper Orig. that never cld stabilize)

Thanks for the glance over!

790i Ultra Board
qx9650 Core Extreme
Viper Patriot Pc2-12800 1600MHz 4GB 7-7-7-20 1.9V
2 - Co-Op EVGA GTX 275 / 250 SLI focused with 2 monitors
2 RAID velociraptor 250 GB HD
XION PowerReal ATX Power Supply 1100W
A bunch o fans an a hamster spinning them.
OS: Vista Ultimate 64bit


BIOS Version: P10
**System **
CPU Freq, MHz: 3.33 GHZ
FSB Reference Clock, MHz: 1333
CPU Multiplier: [10X]
PCle x16-1 & 16-2, MHz:  Auto [100]
PCle x16-3, MHz:  Auto [100]
SPPc->MCP Ref Clock, MHz:  Auto [200]
nForce SPP --> nForce MCP:   [5X]
nForce SPP c-- nForce MCP:   [5X]
**Spread Spectrum**
CPU Spread Spectrum: [Disabled]
HT Spread Spectrum: [Disabled]
PCle Spread Spectrurn(SPP): [Disabled]
PCle Spread Spectrurn(MCP): [Disabled]
SATA Spread Spectrum: [Disabled]
**FSB & Memorv Config**
FSB - Memory Clock Mode: [unlinked]
FSB - Memory Ratio: Auto
FSB (QDR), MHz: [1333]                  <-----Can't get stable above this setting
Actual FSB (QDR), MHz: 1333
x MEM (DDR),  MHz:1333
Actual MEM (DDR), MHz: 1333
P1: [AUTO]
P2: [AUTO]
**Memory Timing Setting**
Memory Timing Setting: [manual]
tCL (CAS Latency): 7
tRCD: 7
tRP: 7
tRAS: 20
Command Per Clock: [2T]
** Advanced Memory Settings **
tRRD: [Auto] 6
tRC: [Auto] 41
tWR: [Auto] 12
tWTR: [Auto] 18
tFAW: [Auto] 31
tREF: [Auto] 7.7us
tRFC: [Auto] 88
**System Voltages**
CPU Core: [1.27500] 1.23V
CPU FSB: [1.30V] 1.30V
Memory: [1.900V] 1.900V
nForce SPP: [1.45V] 1.45V
nForce MCP: [1.600V] 1.600V
GTLVREF Lane 0: [Auto]  -50mv
GTLVREF Lane 1: [Auto]  -50mv
GTLVREF Lane 2: [Auto]  +00mv
GTLVREF Lane 3: [Auto]   +00mv
**CPU Configuration**
Limit CPUlD Maxval: Disabled
Intel Speedstep: Disabled
xPPM Mode: [Native]
CPU Thermal Control: [Disabled]
C1E Enhanced Halt State: [Disabled]
Execute Disable Bit: [Enabled]
Virtualization Technology: [Disabled]
CPU Core 0: [Enabled]
CPU Core 1: [Enabled]
CPU Core 2: [Enabled]
CPU Core 3: [Enabled]

The changes jeffreyham have recommended have been implemented. The system has had no crashes or lock ups. However the IntelBurnTest Fails under standard load settings after 140 Seconds with the Cooling system error.

CPUID Hardware Monitor Places the CP Temp at 70 C, the individual core temps max out at 67 being the highest temp of the four cores and 59 the lowest..

CPU VCore looks to peak around 1.28v according to the monitor, with teh FSB around 1.46v.

Fans at 100% still having same error.

Interestingly enough, running the stress level at Maximum lasts longer... 250seconds

On a side note, I always have had greater stability with one graphics card, with the sli set up, it seems to decrease stability... should I look at this as a factor?

Try bumping up your CPU voltage.

Stupid question maybe, but what is the OP using for a cooling solution on his CPU?  Telling him to raise his Vcore does not sound like the best advice if he is actually experiencing high temperatures?  Has he checked to make sure the TJmax is set properly in what ever HW monitoring program he is using?  If not, he may be hitting the upper temperature limit!?

Some stability came from tweaking settings even more, I can get it 100 solid at 1333. So gonna keep playing with it to get the 1600 out of it. For now gonna head over and trouble shoot the SLI issues and stability. IF i can get both stable at 1333, then I'll start re visiting the 1600. Appreciate all the direction and assistance guys.