Hello
I am having a problem that has stumped even the tech support representatives for my motherboard. Here's the issue:

Simply put, my computer will not load the OS and will reboot automatically when I have more than one stick of memory installed, but loads and works fine with just one.

After building a new computer (see computer specs below) I purchased 3x 2gb ddr3 1600 of Corsair XMS to be used with my Core i7 920. I installed Windows vista 64 bit using just one stick in (2gb) and after installation was complete I installed the other two sticks. The computer starts and posts fine, and at the exact point when windows would normally start loading, it reboots (as if pressing the reset button) and begins the booting process all over, and if left alone, would continue this cycle forever.

At this point I began to check certain things along with the tech support representative on the phone and here's what I found:
-Bios reports 6gb with 3 sticks, 4gb with 2, and 2gb with one which all seems fine.
-Post reports RAM is ddr3 1066 when Ram is actually ddr3 1600 and bios reported timings and voltages to be different than stated by memory manufacturer, but tech said that is normal, but we went into bios to change memory timings and voltages anyway to ones listed on the RAM's heat spreader: 1066 to 1600, 8-8-8-19 to 8-8-8-24, and 1.5v to 1.65v. This provided us with no success.
-I tried every possible dimm slot configuration: since single channel works fine I tried a single stick in each slot with the OS loading each time, proving no broken slots. Then tried the other two sticks separately in each slot with success each time, proving no broken sticks.
-Next I tried flashing the bios to the latest version with no success
-At this point the tech said most likely it could be a memory controller issue, and since the new Intel i7's have the memory controller on the CPU, this meant RMAing and exchanging my CPU for a new one.....which I did......to NO success.

- I called back to the tech to report that replacing the CPU did not work and he said by process of elimination it must be the motherboard and told me to replace that and if that doesn't work try different ram and if that doesn't work then we'd be in one seriously unusual situation.

I have a gut feeling that I headed for that "seriously unusual situation". I really don't want to take apart, RMA, wait two weeks, then build my computer all over again. But I do want to get this issue resolved before the RMA time window and warranty runs out.

Since I know that all of the dimms work, all of the slots work and that the memory controller is fine and BIOS is up to date, and its not a timing/voltage issue; this raises few questions:
What would be preventing the OS from loading in double or triple channel mode?
Why would the computer restart at the exact point Windows would begin to load?
Why would the bios see triple channel memory fine but not windows?
Why is the computer restarting?
Why would single channel be OK but triple not?


If anyone could help, provide input, or just tell me what they think would be greatly appreciated.

Computer Specs:
Case: Antec Solo
PSU: Corsair 650TX
Motherboard: EVGA 132-BL-E758-TR LGA 1366 Intel X58 ATX Intel Motherboard - Retail
CPU: Intel Core i7 920
Memory: CORSAIR XMS3 6GB (3 x 2GB) 240-Pin DDR3 1600 (PC3 12800) TR3X6G1600C8
Video: XFX PVT42EUDE3 GeForce 6800XT 256MB 256-bit
Hard Drives: 2X Seagate Barracuda 7200.9 ST3250824AS 250GB 7200 RPM SATA
OS: Microsoft Windows Vista Home Premium SP1 64-bit


Thank you

Jeff