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Turning off XMP before overclock - almost lost the PC

post #1 of 2
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I started following this guide for Intel CPU overclocking:
http://www.overclock.net/t/1411077/haswell-overclocking-guide-with-statistics

Under overclocking section part 2 states:
"Set any XMP profile OFF for ram. If your ram is above 1600, set it to 1600, no higher while we're testing overclocks. Heck, if your ram is XMP'ed for 1600, lower it to non XMP. Doesn't hurt."

Memory used: G.Skill 8GB DDR3-2133 RipjawsX, F3-17000CL9D-8GBXM

After setting DRAM frequency to 1600 in UEFI (previously was running XMP profile suggested timings - same timings as on physical stickers on the sticks) and restarting I could hear all fans working at 100% (I could hear the fans were a lot louder than usual when i reboot) - no input coming to monitor (no bios/boot input nor windows 10 input).

Eventually after several restarts and changing monitor cable from GPU to Mobo i was able to get to Windows logon screen. Though i never got any input to monitor while BIOS was loading and thus was not able to enter BIOS.

I shut down the computer for about 5 minutes, then tried again and finally monitor got input during BIOS loading - so i quickly changed back the XMP memory profile suggested for my memory and things seem to be back to normal. Did not waste any time checking temperatures or fan speeds - i could hear the fans are at maximum did not want to risk it crashing before i can revert memory settings.


Situation right now - i can boot again with monitor connected to GPU - can also boot into bios with no issues.

Did i do something horribly wrong by changing the DRAM frequency as shown on pictures or have i just gotten unlucky with the memory sticks?



post #2 of 2
I doubt that you could manually set all the timings for XMP - there are over 20 of them, some of which you can't even see without an eprom reader.

My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
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My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
FX6300 Black M5A99X EVO R2.0 Nvidia GTS450 Team Vulcan PC3 12800 
Hard DriveOptical DriveCoolingOS
Samsung 840 PRO Asus DRW-1608P (x2) Custom Water Cooling Win7 (Ult), Win 8.1 & Win Server 2012 R2 
MonitorKeyboardPowerCase
2 X Samsung 915N Ducky Shine III, Blue Cherry/Blue LEDs PCP&C 1kw Lian Li PC-71 (W/Window) 
MouseAudio
Logiteck G400s none 
  hide details  
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Overclock.net › Forums › Components › Memory › Turning off XMP before overclock - almost lost the PC