Woo Woo!
SystemPat,
The OC settings that work for me without fail are simple - I set the multiplier (CPU Clock Ratio) to 17.5. I get CPU speed in the low 3500s and never an error.
With my new RAM, I can also edge the Bus speed (Host Clock Control)to 205 without problems. Above 205, even lowering the 17.5, I have problems w/Prime95. But before putting in the G.Skill 1066/5 that I run as 800/4, I could never change this value. (So my Memory Clock is set manually to 4.00 and DRAM Config manually to 4-4-4-10 14)
My voltages I leave on Auto. According to some programs, this sends 1.42V and 1.95V to my CPU & DRAM respectively - other say they're getting the defaults of 1.35V and 1.8V.
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I never got the re-boot loop but instead got a terminally slow boot - taking normal time to POST, then stopping for 5 minutes at the end of the list you get in Safe Mode, finally going past it to the 2 Windows loading screens and showing the Desktop. Altogether, over 10 minutes to load Windows. Oddly, once it was loaded, everything seemed to run fine and at normal speed. So I took the time to actually load it and switched users to my "Data Backup" user and took care of that task! Wheee!!
Prior to the problems I had plugged in an old SanDisk Cruser Mini 256MB to hold several BIOS versions and had used it to update the BIOS, then change it back again. So my thoughts were on bricking the BIOS somehow by helping others here. I felt incredibly stupid about this - after warning others to be so careful. And I had just moved all of my "old" hard drives to my new home (I've been moving slowly for a couple of months, down to the corner of my office with the computer, a bed and kitchen now) so I didn't have a spare boot drive. Since the problem was not in the POST but only once Windows started, I figured it wasn't the BIOS, but that the drive partition had somehow become damaged when I forgot to set it as the primary boot drive a couple times with BIOS changes. I was getting ready to reformat.
Finally, I noticed the light was on at the end of the Cruzer drive - continually. Hmmm... disconnected the device and all is well.
So my problem is a bit different from the Gigabyte boot-loop, but clearly related to it. And... if I'd swallowed my pride and asked here about the problem, would have saved myself 36hrs of agony too!
I commonly leave a couple of RAM/thumb drives connected to a USB extension unit and never have a problem. The difference perhaps, is that I had drawn the BIOS's attention to the Cruzer drive by using it within the BIOS, to save the CMOS and load the BIOS updates. This may be the fatal element, as it seems to come up in some of the previous cases.