Hi, msi gaming M7 z170 with 6700k @ 4.6 GHz @ 1.3V. I have 2x 8 15 16 16 35 3000 Ripjaws V. bought another Kit with same specs. 4x8 with XMP on gives me a OC Error and I can't boot. 2x8 1 new Stick and 1 old Stick works with XMP. 4x8 Work with XMP disabled @2133. under Memory Z in Bios I took these screenshots. new ram https://www.pic-upload.de/view-36152580/DSC04730.jpg.html old ram https://www.pic-upload.de/view-36152585/DSC04732.jpg.html different Latency timings. Is that the Problem? Gskill and MSI say that the big 32 GB Kit 15 16 16 35 is compatible. But I have 2 seperate 16 Gb Kits with same specs? Is that a problem? Thx for any help. EDIT: 3Ghz 32GB @ 16 16 16 36 seems to work now, had to up the timings by +1 1st and last. EDIT 2: read out the timings with Thaiphoon and set manually, works now 15 16 16 35.