My goodness, fierce battling going on here - I run an HX620 on my IP35-E with no problems whatsoever - one thing I did notice was the following. One day I accidentally hit my surge protector's power button and turned everything off. I turned it back on but no motherboard lights. Tried the switch on the back of the PSU, no dice. So I just turned it off for about 5 min and let it sit there. Turned the switch back on, and the mobo lights came on. Turned on the system - no problem.
This seemed like more of a safety feature to me than a problem. I started panicking at first from all of the posts of issues regarding the HX620 and IP35-E, but I took my time trying to address the issue and was able to fix it. Besides the usual double boot, everything works fine. Hell, it worked fine the first time I even started the damn thing up and I haven't built a rig in 3 years! Some people just have bad luck. If something doesn't work for you, don't assume a QC issue. Be patient, return or exchange the part and try again.
I posted a while back that when I first received my IP35-E from MWave.com that it came poorly constructed with the northbridge heatsink off completely and strange coloration on the chip itself. I didn't take a chance and just returned it. Serpent has helped elucidate a number of things regarding this board and it doesn't seem to me that he's trolling at all. He just read this thread, noticed that it was a similar problem to one that he encountered in his thread, and posted a reply. In the end it's up to the OP whether to take his advice or not. If you're just sick of reading serpent's posts, you have a scroll wheel for a reason.