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I recently moved from 6 2GB modules to some 4GB ones. I initially picked up a dual channel kit of some Patriot Viper Extremes and had no success in getting them to run at XMP timings. Believing that it may have just been the sticks, I decided to go with a triple channel kit of some Corsair Dominators, same issue. I tried manually clocking the Patriot Vipers, to stock settings, but to no avail.

The motherboard is reading the XMP values correctly (as advertised), but she won't post when I reboot.

I have an Extra Special e5645. I seem to remember distinctly using the XMP values from my old 6x2GB sticks (which were DDR3 1600 as well). Am I making stuff up? As it seems the e5645 only supports up to DDR3-1333, does the memory controller in the Xeon lack the multiplier to allow for DDR3-1600 operation, and am I imagining running at DDR3-1600 with my other set?

What should I try?
    
CPUMotherboardGraphicsRAM
Xeon E5645 Asus Rampage II Gene eVGA GTX460 SSC 3x4GB Corsair Dominator PC3-12800 
Hard DriveHard DriveHard DriveOS
Crucial C300 64GB Seagate Momentus XT 750 Western Digital GP 2TB EARS Windows 7 Premium 
MonitorKeyboardPowerCase
Asus VE278Q DSI SMK-88 Seasonic X-660 Lian Li U6B 2011 SE 
MouseMouse Pad
Logitech G500 KAI.g3 HIEN - HARD 
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Reply
    
CPUMotherboardGraphicsRAM
Xeon E5645 Asus Rampage II Gene eVGA GTX460 SSC 3x4GB Corsair Dominator PC3-12800 
Hard DriveHard DriveHard DriveOS
Crucial C300 64GB Seagate Momentus XT 750 Western Digital GP 2TB EARS Windows 7 Premium 
MonitorKeyboardPowerCase
Asus VE278Q DSI SMK-88 Seasonic X-660 Lian Li U6B 2011 SE 
MouseMouse Pad
Logitech G500 KAI.g3 HIEN - HARD 
  hide details  
Reply