With all four RAM sticks in, the RAM Stress Test causes a restart, which often spirals into a series of immediate restarts that occur even before POSTing. But when I put only three sticks in, the machine passes the stress test without a crash. Thinking that one of the sticks might be bad, I swapped them around and there was no apparent difference. It didn't matter what sticks were in, as long as no more than three sticks were in, it would run fine. I thought that the fourth RAM slot on the Motherboard might be bad, since I always filled them up in order (slots 1-3, for 3 sticks). So I moved the third stick to the fourth slot (1,2,4 - for 3 sticks), and ran the test again. It passed. So I can conclude none of the sticks are bad, and all four slots are working, right? But my machine can't run stably with all four in. What could this be? A BIOS setting, a motherboard fault, and power issue? Man, I'm running out of ideas!
Intel Core i7 3770 3.4 GHz CPU
** BIOS F9 ** Gigabyte GA-Z77-DS3H Motherboard
16GB Corsair DDR3 1600 MHz RAM, 4x4GB
OCZ Vertex 4 512GB Solid State Drive
Corsair Professional Series 650W Modular Power Supply
Intel Core i7 3770 3.4 GHz CPU
** BIOS F9 ** Gigabyte GA-Z77-DS3H Motherboard
16GB Corsair DDR3 1600 MHz RAM, 4x4GB
OCZ Vertex 4 512GB Solid State Drive
Corsair Professional Series 650W Modular Power Supply