System unbootable after RAM upgrade Tags: Memory SDRAM Last response: February 23, 2008 12:26 PM in Memory Share DG-- February 23, 2008 8:29:49 AM Hi I have an MSI P965 Platinum motherboard, which had 2x1GB 533 DDR2 SDRAM installed I now have another 2x1GB DDR SDRAM, and I think its the same speed, but with all four chips installed, the system doesn't boot I can however boot the PC with either of the pairs of 2GB installed, so it recognises all the chips, but won't boot with all four installed, only when they are in their original pairs Any ideas why this might be? thanks very much for any help DG More about : system unbootable ram upgrade akhilles February 23, 2008 11:50:23 AM Not enough info. List the make & model of the ram. I think it's the vdimm. mobo57 February 23, 2008 12:17:09 PM You think it's the same speed? Thats probably the problem. You probably have your mobo SPD settings on auto. If the memory modules are different and have different settings, can be a problem, like akhilles said, vdimm for instance. Can't find your answer ? Ask ! Get the answer notherdude February 23, 2008 12:26:40 PM ^^ agreed. Tell us the exact brand/model and we can look it up. Can't find your answer ? Ask ! Publish Related resources Recovery of a Raw Format WD 320GB segate External Hdd/ Unbootable Win7 Forum Upgrades leave computer unbootable . Forum Unbootable but readable HDD. how to transfer files onto an external? Forum Win7 setup format leaves unformatted HD unbootable Forum Unbootable with Video Card Forum Random system freezes after ram upgrade Forum BSOD stops when I remove RAM sticks? Forum Missing DLL file, unbootable , need assistance Forum Impossible temps in bios and unbootable windows 7 Forum After normal win7 install, cannot boot Forum Need to use boot HD in mew Mbd after Mbd failure Forum Missing operating system after bios flash and ram upgrade Forum Laptop refuses to boot after RAM upgrade Forum Dual Booting SSD + HDD Forum System wont boot after ram upgrade Forum Can't boot after upgrade (ICH9->10) with AHCI enabled Forum CPU compatibility. Forum Whats your GA-P35 CPU and "System" temperature at idle? (air cooled) Forum MSI P31 4x1Gb XMS Ram? Forum Upgrade options for Tyan K8W Forum More resources Read discussions in other Memory categories Compatibility DDR2 DDR3 Dual Channel RAM Corsair G.SKILL !