my CCBWE 0532 TPMW 4400+ with the IHS removed won't even prime at 2.90 regardless what vcore I'd tried, it has a very weak mem controller as well. My very first 4200+ stepping was CDBHE 0524 SPBW....only manged 3.04Ghz @1.68v with 256MB x2 GSKILL, if I use the XP4000 Redline or 2GB Ballistix then 3.0Ghz max, but memory controller started to failed, and it died few days later hopefully this one would last me for the next 6 months