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DDR3 1066 memory in a DDR3 1333 slot, will it work?

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Guardianknight
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2013/04/03 20:02:17 (permalink)
Hello all, new PC builder here.  Built a system awhile ago that I currently have an EVGA P55V motherboard sitting in my PC with 2 Corsair XMS3 RAM Chips in it at the moment (DDR3 1600 PC312800).  I recently came across a pair of Kingston KTA-MP1066/4G RAM chips and wondered if I could use 2 of them to go from 4gb ram to 8gb ram or if they would be incompatible with my motherboard.
 
Current motherboard: EVGA P55V 120-LF-E651-TR LGA 1156 Intel P55 Micro ATX Intel Motherboard
 
Current RAM: CORSAIR XMS3 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model CMX4GX3M2A1600C9
 
New RAM: Kingston 4GB DDR3 1066 (PC3 8500) ECC Mac Memory Module w/ Thermal Sensor Model KTA-MP1066/4G
 
Any response would be greatly appreciated, and thank you for taking the time to have a look at this.
 
(Edit: Forum would not allow me to post links so I copied the description in their place)
post edited by Guardianknight - 2013/04/03 20:56:31
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    TECH_DaveB
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    Re:DDR3 1066 memory in a DDR3 1333 slot, will it work? 2013/04/04 07:01:15 (permalink)
    P55 will support 1066 just fine, however do NOT mix and match RAM.  Use 4 identical DIMMs, not 2 different sets of 2.  Likely will have configuration issues, and possibly severe stability issues.
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