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Underclock a ddr3 1866mhz 8gbx2 kit to 1333 for phenom II x4 965

post #1 of 4
Thread Starter 
Hello its my first time here !
Have buy a asus mobo m5a99fx pro r2
my amd phenom II x4 965be i know until now that's support up to 1333mhz rams
so i wonder if my new mobo will be able to see a 1866mhz ram as a 1333mhz ram and so i ask if my mobo be able to underclock those rams automaticaly or even manualy if i have to! if not work will a 1600mhz ram will? or do i have to buy a 1333mhz ram kit? ?
my aim is to avoid buy next year one more pair of rams for a newst cpu!
post #2 of 4
1866 mhz ram will be fine - it will run at 1333 to 1600 with a phenom ii. just ask for help here if u need to go through the bios adjustments to get the speed you want. it would be a good idea to fill out your rig details and add them to your sig. welcome to overclock.net
 
bbowseroctacore
(18 items)
 
 
CPUCPUCPUCPU
fx-9590 x2 fx-9370 x1 fx-8350 x3 fx-8320 x1 
CPUCPUCPUCPU
fx-8150 x2 1100t x1 1090t x3 1055t x1 
MotherboardGraphicsGraphicsGraphics
asus crosshair iv extreme crosshair v formula x2 asus gtx-580 dcii x4 asus gtx-780 oc dcii x4 asus rog xpander 
RAMRAMRAMHard Drive
corsair dominator 2133mhz 16gb corsair dominator 1866mhz 16gb corsair dominator 2000mhz 8gb corsair force gt 120gb ssd 
Optical DriveCoolingCoolingCooling
asus dvd rw ek supreme hf ek fc580 dcii x4 ek fc780 dcii x3 
CoolingOSMonitorKeyboard
ek crosshair v formula z windows 7 64bit home premium asus 23.6" laser 
PowerCaseMouseMouse Pad
antec tpq-1200 x2 desk laser fx 
AudioOther
lil speakers seat on wheels 
CPUMotherboardGraphicsGraphics
fx-9590 asus crosshair v formula asus gtx 780 oc dcii asus gtx 780 oc dcii 
RAMHard DriveHard DriveOptical Drive
corsair dominator gt 1866 16gb corsair neutron gtx 480gb corsair neutron gtx 480gb asus dvd r/rw 
CoolingOSMonitorKeyboard
corsair h100 windows 10 64-bit lg 32" tv asus rog 
PowerCaseMouseMouse Pad
antec 1200 tpq oc corsair 800d obsidian asus rog asus rog 
AudioOther
surround 5.1 cumfy couch 
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bbowseroctacore
(18 items)
 
 
CPUCPUCPUCPU
fx-9590 x2 fx-9370 x1 fx-8350 x3 fx-8320 x1 
CPUCPUCPUCPU
fx-8150 x2 1100t x1 1090t x3 1055t x1 
MotherboardGraphicsGraphicsGraphics
asus crosshair iv extreme crosshair v formula x2 asus gtx-580 dcii x4 asus gtx-780 oc dcii x4 asus rog xpander 
RAMRAMRAMHard Drive
corsair dominator 2133mhz 16gb corsair dominator 1866mhz 16gb corsair dominator 2000mhz 8gb corsair force gt 120gb ssd 
Optical DriveCoolingCoolingCooling
asus dvd rw ek supreme hf ek fc580 dcii x4 ek fc780 dcii x3 
CoolingOSMonitorKeyboard
ek crosshair v formula z windows 7 64bit home premium asus 23.6" laser 
PowerCaseMouseMouse Pad
antec tpq-1200 x2 desk laser fx 
AudioOther
lil speakers seat on wheels 
CPUMotherboardGraphicsGraphics
fx-9590 asus crosshair v formula asus gtx 780 oc dcii asus gtx 780 oc dcii 
RAMHard DriveHard DriveOptical Drive
corsair dominator gt 1866 16gb corsair neutron gtx 480gb corsair neutron gtx 480gb asus dvd r/rw 
CoolingOSMonitorKeyboard
corsair h100 windows 10 64-bit lg 32" tv asus rog 
PowerCaseMouseMouse Pad
antec 1200 tpq oc corsair 800d obsidian asus rog asus rog 
AudioOther
surround 5.1 cumfy couch 
  hide details  
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post #3 of 4
Thread Starter 
Thank you , i know as a technician that would see it as a 1333mhz because phenom 2 x4 sees up to 1333, are you sure that this CPU can see it as a 1600? ( because that i dont know) if yes then its better!!! I had the need to know if my system will not face BSOD and to able to boot normaly !
AS about the right adjustments yes i need help so to underclock right through my mobos UEFI/bios! Thank you friend for make me more sure about it and for your welcome! thumb.gif
post #4 of 4
i have an old Asus 880 AM3 board with my Phenom II and my rams are 1600 MHz and they are set to run at those speeds. Use CPUZ to check. Go under Memory tab. Multiply by two the DRAM frequecy shown.







Actually my board says it will support up to 2000 MHz oc.

Edit: I recall setting the 1600 speed 'cause the board will set the rams to 1333 as default. I set the timings as well based on the manufacturer's spec using BIOS.
Edited by rdr09 - 2/14/16 at 10:15pm
Second Intel Rig
(16 items)
 
  
CPUMotherboardGraphicsRAM
2700 4.5/ 1.28 77 290 (2) 16 / 1866 
Hard DriveCoolingOSMonitor
1000 360/240 10 64 28 2160 
PowerCase
850 540 
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Second Intel Rig
(16 items)
 
  
CPUMotherboardGraphicsRAM
2700 4.5/ 1.28 77 290 (2) 16 / 1866 
Hard DriveCoolingOSMonitor
1000 360/240 10 64 28 2160 
PowerCase
850 540 
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